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Optical Communications > Receiver ReceiverReceiver patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.09/13/07 - 20070212080 - Infrared receiving unit and infrared headphone/hearing aid There is provided an infrared receiving unit which has an infrared receiver for receiving infrared signals and a transmitter search facility for carrying out an infrared transmitter search. Such an infrared receiving unit can be suitably used in an infrared headphone/hearing aid, a mobile terminal or an interpretation and conference ... 09/06/07 - 20070206963 - Optical quadrature-amplitude modulation receiver In one embodiment, a receiver of the invention has an optical detector coupled to a digital processor. The optical detector is adapted to mix the received optical quadrature-amplitude modulation (QAM) signal with an optical local oscillator (LO) signal having a time-varying phase offset with respect to the carrier frequency of ... 08/30/07 - 20070201881 - Discrete bootstrapping in an optical receiver to prevent signal feedback An optical receiver assembly that is configured to avoid the introduction of feedback in an electrical signal converted by the assembly is disclosed. In one embodiment, an optical receiver assembly is disclosed, comprising a capacitor, an optical detector provided with a power supply being mounted on a top electrode of ... 08/23/07 - 20070196112 - Power save mode for an optical receiver According to embodiments of the present invention, an optical receiver detects an optical signal, determines the signal strength, and is placed in a power save mode if the optical signal strength falls below a predetermined level. A microcontroller may instruct a transimpedance amplifier integrated circuit (TIA IC) or other circuitry ... 08/16/07 - 20070189780 - Fiber-to-the-home (ftth) optical receiver with distributed gain control A fiber-to-the-home (FTTH) system transmits forward and reverse optical signals, such as video, voice, and data signals, via optical fiber, and includes a plurality of home network units. The home network units include an optical receiver for receiving at least one of the video, voice, and data signals. Included is ... 07/05/07 - 20070154226 - Optical burst mode receiver An optical burst mode receiver comprises a photo-detector receiving an optical signal for conversion to a current signal, a transimpedance amplifier receiving and converting the current signal into first and second transmit signals, a limiting amplifier comprising first and second input terminals and an output terminal generating a data signal, ... 07/05/07 - 20070154225 - Optical receiver with duo-binary encoder An optoelectronic circuit has an optical to electrical converter, a duo-binary encoder with an input coupled to an output of the converter, and a duo-binary decoder having an input coupled to the output of the encoder. A decision circuit having an input coupled to an output of the decoder is ... 06/21/07 - 20070140706 - Optimum sample spacing in over-sampled maximum likelihood sequence estimation receivers In an over-sampled maximum-likelihood sequence estimation (MLSE) receiver system, the optimal sample spacing is determined for a variety of conditions. In an illustrative implementation, the system includes an optical filter for tightly filtering an incoming optical data signal with an on-off-keying (OOK) non-return-to-zero (NRZ) format, followed by an optical-to-electrical converter, ... 06/07/07 - 20070127933 - Optical dqpsk receiver apparatus A first interferometer comprises a first delay element and a first phase shift element, and a second interferometer comprises a second delay element and a second phase shift element. The amounts of phase shift in the first and second phase shift element are zero and π/2, respectively. A first photo ... 05/10/07 - 20070104494 - Opitcal receiver reliably detectable loss-of-signal state The present invention is to provide an optical receiver that prohibits the miss-detection of the recovery from the LOS (Loss-Of-Signal) state. The optical receiver includes an light-receiver device for converting an optical input signal to a photo-current, a pre-amplifier for converting this photo-current into a voltage signal, and a LOS ... 05/10/07 - 20070104493 - Optical receiver preamplifier An optical receiver preamplifier includes an inverting amplifier 1 and a current-voltage conversion element 2 connected between input and output terminals of the inverting amplifier 1. The inverting amplifier 1 includes a first transistor 3 having a gate connected to the input terminal In of the inverting amplifier 1, a ... 04/19/07 - 20070086791 - Light receiver There is provided a light receiver including a photodiode converting an optical signal into an electrical signal, and a plurality of amplifiers respectively having different gains, each input end of the plurality of amplifiers being connected to one end of the photodiode, and one of the plurality of amplifiers being ... 04/19/07 - 20070086790 - Optical receiver with matched photodetector capacitance An optical receiver has a voltage supply, a first node, and a second node. A first input of a differential amplifier is coupled to the first node and a second input of the differential amplifier is coupled to the second node. A photodetector is coupled between the voltage supply and ... 03/29/07 - 20070071455 - Automatic gain control A method and apparatus is presented for providing improved responsiveness of a receiver device. One embodiment includes a receiver device including an avalanche photodiode (APD), a transimpedance amplifier (TIA), and an automatic gain control (AGC) device configured to adjust the reverse bias voltage applied to the APD according to an ... 03/08/07 - 20070053698 - Free space optics photodetector and transceiver A novel optical detection apparatus is disclosed comprising a plurality of photodetectors and a plurality of transimpedance amplifiers wherein the photodetectors and the amplifiers are electrically connected to each other and are located in close proximity to each other, thus allowing the detecting of high frequency optical signals over a ... 03/01/07 - 20070047971 - Rz-dpsk optical receiver circuit A received RZ-DPSK signal is guided to an interferometer. The interferometer comprises a 1-bit delaying element in an upper arm. A balanced photodiode converts a pair of optical signals output from the interferometer into electrical signal. A high-pass filter, which has a cut-off frequency equal or approximately equal to the ... 02/22/07 - 20070041736 - Method and arrangement for forming reception pulses in an infrared receiver In a method and arrangement for forming reception pulses, output signals of an upstream comparator which recognizes light pulses are used to evaluate a downstream arrangement and are newly formed and emitted as pulses. The aim is to produce a method and an associated circuit arrangement for forming reception pulses ... 02/01/07 - 20070025739 - Communications systems and methods This invention relates to systems and methods for wireless and wired optical data communications, in particular infrared data communications using techniques borrowed ultra wideband (UWB) radio. An optical data communications receiver for receiving data encoded using optical pulse position, the receiver comprising: an optical signal reception device; a reference signal ... 01/25/07 - 20070019969 - Apparatus and method for converting optical signal into electrical signal An apparatus and a method for converting optical signal into electrical signal are disclosed. The apparatus includes a photo diode (PD) and a charge pump circuit. The PD receives an optical signal. The optical signal is then converted into a current signal. The charge pump circuit is electrically connected to ... 11/23/06 - 20060263100 - Optical receiver The present invention provides an optical receiver able to monitor the level of the optical input signal in accurate even when the level is quite small. The optical receiver comprises a photodiode to generate a photocurrent Ipd, a current mirror circuit to reflect the photocurrent into a mirrored current Imon, ... 11/16/06 - 20060257153 - Optical receiver applicable to multiple transmission speed The present invention provides an optical receiver that enables to vary the sensitivity depending on the transmission speed. The optical receiver provides a photodiode to generate the photocurrent, the pre-amplifier to convert the photocurrent to the voltage signal, the lead pin to supply the bias voltage to the photodiode, and ... 08/24/06 - 20060188269 - Apparatus and method for detecting beam power in optical drive An apparatus and method for detecting beam power generated by a plurality of light sources, using a single device. The apparatus includes a light-receiving unit that receives the beam power generated by one of a plurality of light sources, and an amplifying unit that selects a gain, amplifies the beam ... 08/10/06 - 20060177228 - Impedance matching broadband optical receiver circuit An impedance matching broadband optical receiver circuit including an input terminal adapted to receive an input information bearing signal, extending over a broad input frequency band, and a plurality of output terminals operative to provide, in response to receipt of the input information bearing signal, respective outputs in generally non-overlapping ... 06/22/06 - 20060133825 - Optical receiver An optical signal emitted from an optical transmitter is received and converted into electrical signals by a plurality of photodetectors 12a individually. A plurality of amplifiers 13a individually amplify the electrical signals converted by the respective corresponding photodetectors 12a. A plurality of identification sections 14a individually identify multivalued digital data ... 06/08/06 - 20060120732 - Apparatus and method in optical receiver for receiving burst mode signal Disclosed is an optical receiver for receiving burst mode signals. In a first embodiment, AGC voltage is applied to a continuous mode TIA having an AGC function, so that the AGC function is stopped and a gain of the TIA is fixed to a constant. In a second embodiment, a ... 06/08/06 - 20060120731 - Optical receiver device and method An optoelectronic device has a bright detector and a dark detector and reduces noise in the output of the bright detector using the output of the dark detector. ... 05/18/06 - 20060104647 - Receiver circuit for a receiving element A receiver circuit is disclosed which enables a reception signal fed into the receiver circuit by a reception element to be processed—e.g. amplified—with little to no errors The receiver circuit has a cascode circuit on an input side, which cascode circuit generates an output signal from the reception signal of ... 04/06/06 - 20060072926 - Optical signal receiver, and method for controlling identification point for binarization processing performed thereby A method for controlling an identification point for binarization processing in an optical signal receiver which can diminish a code error rate by optimally tracking an identification point at all times in accordance with a received signal, thereby maintaining transmission quality high. The method comprises identification point electrical signal increment/decrement ... 03/30/06 - 20060067711 - Receiver with dynamically adjustable decision threshold voltage based on input power According to embodiments of the present invention, an optical transponder and/or optical transceiver includes a decision circuit, which scales a decision threshold voltage based on power in a received optical signal. In one embodiment, the decision set point may be established based on an expected amplitude or power of an ... 03/30/06 - 20060067710 - Mechanism to select bandwidth in an optical receiver circuit An optical receiver circuit is disclosed. This receiver included in receiver optical sub-assembly (ROSA) adjusts bandwidth based on a voltage level detection at a receiver signal strength indication (RSSI) pin, or rate-adaptively adjusts the bandwidth of optical receiver circuit based on operation data rate. ... 02/16/06 - 20060034620 - Low noise optical receiver A low noise optical receiver includes an amplifier in a feedback network, which allows the value of a feedback resistor to be increased. The magnitude of the gain of the feedback amplifier is greater than one. By increasing the value of the feedback resistance, the effective noise of the receiver ... 02/16/06 - 20060034619 - Level detector for optical receivers An apparatus and method for detecting an output power level of an optical receiver, in order to hold output signal levels constant over changing input optical levels. A photodetector detects an optical signal, and a current from the photodetector is applied an amplifier. The amplifier may be either a differential ... 01/26/06 - 20060018669 - Optical receiver with dynamic gain and bandwidth The present invention provides an optical receiver applicable to various transmission rates. The optical receiver of the invention includes a main amplifier and a switching unit. The main amplifier amplifies a voltage signal output from the preamplifier, which converts the photocurrent to the voltage signal. The switching unit is inserted ... 01/12/06 - 20060008280 - Receiving circuit and electronic apparatus for optical communication In an optical communication-use receiving circuit of the present invention, the pulse width of the received pulse which is a binary signal corresponding to the signal optical pulse is specified by using an integration circuit and a trigger generating circuit. If the pulse width of the received pulse is not ... 01/12/06 - 20060008279 - Pattern-dependent error counts for use in correcting operational parameters in an optical receiver An optical transmission network includes an optical transmitter photonic integrated circuit (TxPIC) chip, utilized in an optical transmitter and has a plurality of monolithic modulated sources integrated for multiple signal channels on the same semiconductor chip is provided with channel equalization at the optical receiver side of the network that ... 01/05/06 - 20060002720 - Optical receiving unit reducing cross talk between optical transmitting unit and optical transmitting/receiving apparatus installing the same The present invention provides an optical transceiver to reduce a crosstalk in sufficient. The optical receiving unit of the invention includes an O/E-converter, a signal processing unit, and an offset voltage setting unit. The input of the signal processing unit, connected to the output of the O/E-converter, receives an electrical ... 12/29/05 - 20050286910 - Modulated processor pwm A method of, and an apparatus for, biasing photodiodes used in optical receivers or optical transceivers includes an electronic circuit for generating a bias voltage for the photodiode and a processor having a pulse-width modulation unit that produces pulse-width modulated pulses at a predetermined number of duty cycle values M. ... 12/22/05 - 20050281564 - Optical receiver circuit An optical receiver circuit comprising an optical converter circuit (38), comprising a photodiode and converting optical power into electrical power, a sensor circuit for deriving a control voltage VCONTR as a characteristic value of the electrical power output by the optical converter circuit (38); and an attenuator circuit (44) having ... 11/24/05 - 20050260001 - Burst signal receiver A burst signal receiver that performs efficient signal conversion when burst optical signals received from various terminals differ in intensity. In a PON system, a photodiode is used to receive burst signals from subscriber terminals (ONUs). An OLT system informs a light-sensitive circuit of subscriber terminals (ONUs) that transmit burst ... 11/17/05 - 20050254828 - Optical signal receiving unti and apparatus for reproducing information The optical signal receiving unit (10), which receives and processes an optical signal, can be programmed by the optical signal. The optical signal is detected by an optical sensor (20) and processed by a signal processor (40). The signal processor (40) has an operating mode, which is set by a ... 11/03/05 - 20050244167 - Signal-to-noise ratio (snr) value characterization in a data recovery channel Method and apparatus for determining a signal-to-noise ratio (SNR) value from a readback signal, such as in a data storage device. A readback signal is obtained by a receiver (such as a data transducing head) coupled to a data recovery channel having a variable gain amplifier (VGA) and a threshold ... 10/20/05 - 20050232644 - Optical heterodyne receiver based on oversampling An optical receiver adapted to apply multiple-sampling processing to an intermediate frequency (IF) signal generated based on heterodyne detection of an optical communication signal. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a signal decoder adapted to process the IF signal generated by the converter to ... 10/13/05 - 20050226640 - System and method for a compact optical receiver with wide dynamic range An optical receiver is disclosed comprising an erbium-doped fiber amplifier (EDFA) that is coupled to a photodiode and transimpedance amplifier without filtering output light signal in the EDFA. Optionally, a clock/data regenerator can be coupled to the electrical output of the transimpedance amplifier for compensating for noise distortion and timing ... 10/06/05 - 20050220459 - Receiver circuit having an optical receiving device The invention relates to a receiver circuit having an optical receiving device, a plurality of amplifiers that are connected to the receiving device, and circuit means or a control circuit for individually activating and deactivating the individual amplifiers. In this case, the amplifiers each differ from one another in at ... 09/29/05 - 20050213994 - Arrayed receiver optical sub-assembly including layered ceramic substrate for alleviation of cross-talk and noise between channels A receiver optical subassembly (ROSA) includes a photodetector array and a transimpedance amplifier (TIA) array. In each data channel, the photodetector is wire bonded to a corresponding input pad of the TIA array. A ground pad is disposed between adjacent input pads and connected to a ground plane via an ... 09/15/05 - 20050201762 - Optical rz-duobinary transmission system with narrow bandwidth optical filter Simultaneous tolerance of system nonlinearities and chromatic dispersion in an optical transmission system using return-to-zero (RZ) duobinary signaling is achieved by filtering the received signal in the optical domain with a bandpass filter having a bandwidth B substantially equal to the bit-rate of the RZ-duobinary data signal. The use of ... 09/01/05 - 20050191062 - Optical receiver comprising a receiver photodetector integrated with an imaging array A high-speed optical communications cell is integrated at the interior of a two-dimensional imaging array. The combined receiver and imager carries out both photodetection (converting photons to electrons) and circuit functions (e.g. amplifying and integrating the signals from the photodetectors). The high-speed receiver cell comprises a photodetector and a high-speed ... 08/25/05 - 20050185971 - Reset free devices It is possible to perform reset free operation in devices having polarization state controllers by employing specific sequences of phase shifters and couplers. In particular, sequences comprising a coupler/phase shifter/coupler or phase shifter/coupler/phase shifter formed in, for example, a semiconductor substrate, e.g. silicon substrate, is used to form the polarization ... 08/25/05 - 20050185970 - Reset free devices It is possible to perform reset free operation in devices having polarization state controllers by employing specific sequences of phase shifters and couplers. In particular, sequences comprising a coupler/phase shifter/coupler or phase shifter/coupler/phase shifter formed in, for example, a semiconductor substrate, e.g. silicon substrate, are used to form the polarization ... 08/25/05 - 20050185969 - Method and apparatus for processing optical duobinary signals An optical receiver adapted to apply multiple-sampling processing to an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder adapted to process an electrical signal generated by the converter to generate a ... 08/18/05 - 20050180763 - Optical detector system An optical detector circuit comprises a photodetector including an optical input for generating a detection signal; a pre-amplifier including a pre-amplifier input and a pre-amplifier output for generating a pre-amplified signal, the pre-amplifier input coupled to the photodetector; and an amplifier including a amplifier input and an amplifier output for ... 08/11/05 - 20050175361 - Receiving apparatus, transmitting apparatus, and communication system A receiving apparatus and transmitting apparatus capable of reliably transmitting and receiving a high speed optical signal and a communication system using the same, wherein provision is made of a transmitting apparatus comprising a conversion circuit for converting serially input data to a plurality of bits of parallel data given ... 08/11/05 - 20050175360 - Receiving apparatus, transmitting apparatus, and communication system A receiving apparatus and transmitting apparatus capable of reliably transmitting and receiving a high speed optical signal and a communication system using the same, wherein provision is made of a transmitting apparatus comprising a conversion circuit for converting serially input data to a plurality of bits of parallel data given ... 08/11/05 - 20050175359 - Optical receiver An optical receiver. The optical receiver includes a photodiode, a differential transimpedance amplifier, a transistor, and a current source. When the photodiode receives an optical signal, a current signal transmitted from a cathode of the photodiode to an anode thereof is generated. Two input terminals of the differential transimpedance amplifier ... 08/04/05 - 20050169646 - Lincoln distributed optical receiver array An array of spatially-separated optical detectors is configured to receive a free-space optical communication signal from a remote source. Each optical detector of the array includes an optical system and an array of light sensors. The optical system collects a portion of light received from the remote source and directs ... 08/04/05 - 20050169645 - Adjustable dynamic range optimization for analog to digital resolution for intelligent fiber optic receivers and method A receiver in a fiber optic system including an optical detector, an electronic circuit and an adjustment input circuit. The optical detector is configured to receive optical signals of varying light intensity. The optical detector has a dynamic range of sensitivity between a high optical intensity value and a low ... 07/14/05 - 20050152705 - Gain variable amplifier, carrier detection system, and infrared remote-control receiver using them In a gain variable amplifier, a carrier detection circuit system, and an infrared remote-control receiver using the gain variable amplifier or the carrier detection circuit system, to each of a positive output voltage Vo1 and a negative output voltage Vo2 of an amp to be subjected to gain control, connected ... 07/07/05 - 20050147418 - Increased transmission capacity for a fiber-optic link A method of decoding a signal in an optical fiber. In one embodiment the method includes receiving the optical signal, wherein the optical signal is a pulse amplitude modulated signal. Converting the optical signal to an electrical signal. Comparing the electrical signal with a plurality of levels. Producing comparison output ... 06/23/05 - 20050135817 - Control device with a switchable bandwidth A control device with a switchable bandwidth including: an integrating element with a first capacitance, which is charged and discharged by at least one current; at least one second capacitance, which can be connected in parallel with the first capacitance via a first switch; and at least one voltage follower, ... 06/16/05 - 20050129414 - Testing of transimpedance amplifiers Testing is performed on an amplifier wafer housing a transimpedance amplifier prior to packaging the transimpedance amplifier with an external photodetector, wherein the transimpedance amplifier includes a small, auxiliary, integrated silicon photodetector provided at the input of the transimpedance, in parallel with external photodetector attachment points. The small auxiliary photodetector ... 06/09/05 - 20050123307 - Optical receiver and data communication apparatus comprising same An optical receiver is capable of minimizing fluctuations in the pulse width of an electrical signal rendered by converting an optical signal of broad-range illumination. The optical receiver includes a light-receiving element that receives an optical signal and converts the optical signal into a current; a bypass element through which ... 06/02/05 - 20050117916 - Digital optical receiving module, and a method for monitoring the signal quality of a transmitted, modulated optical signal A digital optical receiving module including: an optical input, a first digital electrical output, an optoelectronic transducer device which converts a modulated optical signal, which is applied to the optical input, to an analog electrical signal, a decision-making device, which is electrically connected to the transducer device and converts the ... ### FreshPatents.com Support |