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Telecommunications > Receiver Or Analog Modulated Signal Frequency Converter > Frequency Modifying Or Conversion Frequency Modifying Or ConversionFrequency Modifying Or Conversion 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.03/01/07 - 20070049235 - Apparatus and method for transmitting signals A signal transmission apparatus may transmit and receive a differential signal using transmission lines. The apparatus may include a transmitter and a receiver. The transmitter may transmit a mixed signal obtained by mixing the differential signal with a single ended signal. The receiver may restore the differential signal and the ... 03/01/07 - 20070049234 - Wideband variable gain amplifier in an ultra wideband receiver A method (700, 1100) and apparatus (300) are provided in a receiver for applying a variable gain to a received signal including a transmitted codeword in accordance with an Ultra Wideband (UWB) protocol. A first signal is generated and input to a selectable gain stage including a series of selectable ... 02/22/07 - 20070042743 - Frequency changer and tuner A frequency changer for a radio frequency tuner and a tuner incorporating such a frequency changer are provided. The frequency changer comprises a mixer comprising a plurality of mixing stages. The output signals of these stages are supplied without relative phase shift to a summer, for example, in the form ... 02/22/07 - 20070042742 - Terrestrial-digital multimedia broadcasting and digital audio broadcasting low intermediate frequency receiver A terrestrial-digital multimedia broadcasting (T-DMB) and digital audio broadcasting (DAB) low intermediate frequency (IF) receiver comprises a low noise amplifier (LNA), an image rejection down-conversion mixer, a low pass filter, an amplifier, a local oscillator, a phase-locked loop, and an automatic gain controller (AGC). Particularly, the LNA, the image rejection ... 02/15/07 - 20070037542 - Combined low-if/direct down conversion baseband architecture for 3g gsm/wcdma receivers A radio receiver for receiving signals of at least two different communication standards, including a narrow band signal having a narrow bandwidth and a wide band signal having a wide bandwidth, is provided. The receiver comprises a shared radio frequency (RF) front-end that receives the wide band signal during at ... 02/08/07 - 20070032215 - Circuit current generation apparatus and method thereof, and singal processing apparatus A semiconductor integrated circuit for use in a receiver can reduce fluctuations in characteristics caused by fluctuations in current to thereby reduce dissipation power. A bias current detection circuit and a current control circuit are provided to decrease a current of a high-frequency circuit if a bias current is large ... 02/01/07 - 20070026834 - High frequency semiconductor integrated circuit device, wireless electric unit and wireless communication system A transmission oscillator of differential output configuration is incorporated into a high frequency IC. Further, an equivalent impedance having an impedance equivalent to the impedance connected with a regular output terminal is provided. Or, a dummy external terminal for outputting transmit signals in opposite phase is provided. One of the ... 01/18/07 - 20070015482 - Simplified high frequency tuner and tuning method A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the channel spacing or one-half of a channel spacing ... 01/18/07 - 20070015481 - Signal conversion apparatus and signal conversion method A signal conversion apparatus includes a local oscillator for locally generating a signal having a frequency, a phase shifter for shifting the phase of the locally generated signal output from the local oscillator by an amount determined based on a relationship between the amount of phase shift and the amount ... 01/11/07 - 20070010228 - Mixer arrangement, use of the mixer arrangement and method for frequency conversion A mixer arrangement includes a mixer cell coupled by a signal input to a mixer input, and is embodied for frequency conversion of a signal present on the input side to an intermediate frequency. A first current source is coupled to the signal input of the mixer cell, and a ... 12/21/06 - 20060286956 - Signal processing device and method for operating a signal processing device A signal processing device implemented in a semiconductor body includes a frequency conversion device and a converter connected to the frequency conversion device. The conversion device is coupled by a terminal to a terminal on the surface of the semiconductor body. One terminal of the converter is connected to a ... 12/14/06 - 20060281430 - Frequency converter capable of preventing level of intermediate frequency signal from lowering due to rise in temperature There is provided a bias power supply for setting a collector bias current of a mixer transistor and a collector bias current of an oscillation transistor. When a control voltage is equal to or smaller than a first predetermined value, an output voltage of the bias power supply is set ... 12/14/06 - 20060281429 - Downconverter and upconverter A downconverter and upconverter are provided which can obtain a satisfactory image rejection ratio in a low-Intermediate Frequency (IF) scheme while reducing power consumption, and can improve Error Vector Magnitude (EVM) in a zero-IF scheme. A complex-coefficient transversal filter rejects one side of a positive or negative frequency, and converts ... 10/12/06 - 20060229052 - Circuit and method for signal reception using a low intermediate frequency reception A method and circuit for receiving a radio frequency signal by receiving and amplifying the radio frequency signal to produce a received signal and generating first and second clock signals corresponding to first and second channel signals, respectively, of the received signal and multiplying the received signal with the clock ... 10/05/06 - 20060223481 - Integrated circuit layout for a television tuner An integrated circuit including one or more radio frequency (RF) filters to receive an RF signal and to generate a filtered RF signal and a down conversion stage coupled to the RF filters, the down conversion stage further including a local oscillator circuit and an intermediate frequency (IF) filter, the ... 09/21/06 - 20060211396 - Receiver apparatus and method of processing received signal which attain optimum snr A receiver apparatus includes a band-pass filter having a variable frequency band coupled to a node for receiving a received signal including a plurality of channels to output at an output node thereof a limited-band signal made by limiting a frequency band of the received signal to a frequency band ... 08/31/06 - 20060194557 - Tuner A tuner is provided for permitting independent reception of a plurality of channels from a multiple channel radio frequency input signal. A first analog converter of the upconverter type block-converts the radio frequency band to an intermediate frequency band. Several second analog frequency converters, such as quadrature ZIF downconverters, are ... 07/27/06 - 20060166637 - Mixer To realize a mixer with a charge subsampling circuit with which a base band signal can be readily obtained without being affected by noise from wide bandwidth signals or undesired signals. A current generating circuit 8 outputs a current in proportion to the input signal voltage. In response to a ... 07/06/06 - 20060148438 - Dc trimming circuit for radio frequency (rf) down-conversion The present invention relates generally to communications, and more specifically to a method and apparatus for minimizing DC offset and second-order modulation products (IM2 noise) while demodulating RF signals. The principle of the invention can be applied to differential, down-conversion circuits (50) consisting of two differential mixers (54, 56) in ... 06/29/06 - 20060141973 - Digital architecture for radio-frequency apparatus and associated methods A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry. The receiver analog circuitry resides within a first integrated circuit and the receiver digital circuitry resides within a second integrated circuit. The second integrated circuit couples to the first integrated circuit via a one-bit digital interface. ... 06/29/06 - 20060141972 - Signal processing device and direct conversion reception device A base band signal input from an input terminal (10) has a DC component which is blocked off by a high pass filter (12). When the signal which has passed through the high pass filter (12) has a voltage out of a predetermined set voltage range, the signal of the ... 06/22/06 - 20060135108 - Phase-accurate multi-phase wide-band radio frequency local oscillator generator A local oscillator (LO) generator for driving a bank of mixers that provides precise phase relationship between multi-phase LO outputs comprises a shift register using slave-master-slave flip-flop elements. The LO generator can be used over a wide operating frequency range. The LO generator is suitable for driving a multi-phase LO ... 06/15/06 - 20060128343 - Method for processing an analog signal and device therefor The invention relates to a method of processing an analog signal whose frequency spectrum exhibits over a determined bandwidth two main lobes separated by a frequency band where the power is negligible; it comprises a step of sampling according to a determined sampling frequency, and prior to this sampling step, ... 06/08/06 - 20060121871 - Apparatus for freqeuncy direct conversion reception in mobile communication terminal and method thereof An apparatus for frequency direct conversion reception in a mobile communication terminal and method thereof are disclosed, by which a DC offset can be removed. The present invention includes a power distributor configured to distribute a radio frequency input signal into two signals having 180° phase differences, an equal phase ... 06/01/06 - 20060116098 - Sound intermediate frequency conversion circuit In a sound intermediate frequency conversion circuit, a second mixer receives an output of a first mixer which converts a first SIF; reference signal sources and receives an output of a frequency divider. The output of the reference signal source is got through the divider, and then a frequency conversion ... 05/04/06 - 20060094390 - Method and system for a dual mode receiver with low intermediate frequency (if) and zero second if In RF transceivers, a method and system for a dual mode receiver with low intermediate frequency (IF) and zero second IF are provided. An RF receivers may be adapted to operate in a low IF down conversion mode or a baseband down conversion mode. A control signal may be generated ... 05/04/06 - 20060094389 - Push-pull amplifier and frequency converter circuit As an output amplifier of a frequency converter circuit, a push-pull amplifier that allows operating with a small consumption current and providing a high gain is used. Further, the push-pull amplifier is configured to have a voltage drop circuit to lower the collector potential of the upper transistor to the ... 04/13/06 - 20060079196 - Data receiver adaptive to rssi and a method of determining its threshold A modem generates a new RSSI threshold value in response to a flag signal representing the quality of the threshold value indicated by the result of error detection supplied from one monitor, and supplies the generated threshold value to another monitor. The RSSI threshold value set in the other monitor ... 04/13/06 - 20060079195 - Low if receiver systems and methods Embodiments of a low intermediate frequency system and method are disclosed. In one embodiment, among others, a method for operating a receiver is disclosed that comprises receiving a radio frequency signal, downconverting the radio frequency signal to a downconverted signal comprising an in-phase component and quadrature component, and estimating a ... 02/23/06 - 20060040634 - Mixers with a plurality of local oscillators and systems based thereon Apparatus (40) for processing an input signal (SRF (t)) with a carrier frequency (?RF) defining a desired band and at least a sideband being defined by a side-band frequency (n?LO) that is higher than the carrier frequency (?RF). The apparatus (40) comprises a main input (50) for receiving said input ... 02/16/06 - 20060035616 - Wireless data communication device A radio communication device is disclosed. A millimeter range mixer having a first immediate frequency port, a second reference port, and a millimeter wave port receives an intermediate frequency radio signal. A local oscillator source provides a reference signal to the reference port of the mixer, and using a millimeter ... 02/16/06 - 20060035615 - Balanced hybrid coupler network An electrical processing network including a first set of ports and a second set of ports electrically coupled to the first set of ports. The first set of ports are for a first set of signals with approximately 0° and 180° relative phase. The second set of ports are for ... 02/02/06 - 20060025099 - Apparatus and method for downward mixing an input signal into an output signal Device for downward mixing an input signal into an output signal includes means for generating a first receive signal and a second receive signal on a first intermediate frequency, a converter means for analog/digital converting the first and the second receive signals on the first intermediate frequency, a phase detection ... 01/05/06 - 20060003725 - Frequency division The invention relates to a method of operating a frequency divider. The frequency divider includes a plurality of divider cells arranged in a chain. Each divider cell is adapted to divide a frequency of an input signal with one of two enabled division ratios in accordance with an applied division ... 12/22/05 - 20050282514 - Apparatus and method generating multi rf tone signals in uwb communication system An apparatus and method for converting a frequency of a high frequency signal received from an antenna in an ultra wide band communication system transmitting and receiving using at least two reference frequencies. The method includes generating generation frequencies having frequencies set to convert the frequency of the high frequency ... 12/22/05 - 20050282513 - Sample rate conversion systems with an independent internal oscillator Because of the natural ability to reject clock jitter, the SRC circuits include an internal oscillator to provide an operating clock signal. The internal oscillator can be operated independently of any external frequency control signal, including input and output frame clocks. The internal oscillator can be implemented as a relatively ... 11/17/05 - 20050255820 - Pole switch down converter with symmetric resonator A pole switch down-converter with symmetric resonator which reduce the non resonating phase to approximately half of the RF carrier period of the modulated signal is proposed. The down-converter comprises a first and second λ/2 resonator for collecting RF energy, wherein a differential RF signal is coupled to the first ... 11/03/05 - 20050245225 - Wideband i/q signal generation device An apparatus for generating an in-phase/quadrature-phase (I/Q) signal in a wireless transceiver is disclosed, including a local oscillator for generating a local oscillation signal, and first and second mixers for mixing the oscillation signal with a transmission/reception signal to convert the transmission/reception signal into a baseband or high-frequency signal. The ... 10/20/05 - 20050233722 - Signal-processing electronics The present invention relates to a method and an electronic circuit for processing at least two at least partially correlated output signal streams of a mixer, the mixer having at least two signal inputs and at least two electric signal outputs. In order to provide a method and a device ... 10/20/05 - 20050233721 - Receiver In a receiver, a mixer portion provided in a front-end portion thereof is built with two mixers with different input/output linearity characteristics and different current consumption. According to the electric-field strength of a received signal, or manually, one of the mixers is chosen to operate so that, when the electric-field ... 09/22/05 - 20050208922 - Frequency mixer preventing degradation in linearity on amplitude of input signal A frequency mixer includes a first N channel MOS transistor, second and third N channel MOS transistors constituting a local oscillator signal differential pair, and having substantially identical properties, a first load, and a second load. The first N channel MOS transistor receives an RF signal at its gate. A ... 09/15/05 - 20050202797 - Methods and systems for down-converting electromagnetic signals, and applications thereof Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an aliasing rate. The EM signal is aliased according to the aliasing signal to ... 09/08/05 - 20050197091 - System and method for radio signal reconstruction using signal processor A waveform reconstruction circuit receives an rf signal from an antenna, digitizes it, and then generates an undistorted reconstructed waveform. The reconstructed waveform can then be conventionally mixed and demodulated to extract useful signal information with enhanced receiver fidelity and sensitivity. ... 09/08/05 - 20050197090 - Current-mode direct conversion receiver A current-mode direct conversion RF receiver is presented. In one set of embodiments the RF receiver comprises a simple transconductor input stage to create a current-mode modulated signal from a voltage-mode modulated signal. A downconversion mixer may be coupled to the transconductor input stage via a low impedance current cascode ... 08/11/05 - 20050176397 - Versatile charge sampling circuits A charge sampling circuit, has a control signal generator for controlling an analog input signal to the charge sampling circuit to be integrated by an integrator during a sampling phase responsive to a sampling signal from the control signal generator. The current of the analog input signal is integrated to ... 08/11/05 - 20050176396 - Receiver apparatus A receiver (11) converts a received signal directly to a baseband signal, and includes: a switched-capacitor filter (19) controlling a cutoff frequency when the baseband signal is filtered according to a control signal provided for a switched-capacitor element (27); an oscillator generating a periodic signal; and a divider (31) dividing ... 06/30/05 - 20050143042 - Dc offset, re-radiation, and i/q solutions using universal frequency translation technology Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset voltages and re-radiation generated when down-converting an electromagnetic (EM) signal is also described herein. Down-converting a signal and improving receiver dynamic range is also ... 06/30/05 - 20050143041 - Frequency generation apparatus and method for data transmission A reference frequency generation method and apparatus for communication systems that transmit and receive data by use of an ultra wide band of at least two frequency groups having at least two reference frequencies. The method and apparatus generate the reference frequencies by generating generation frequencies by use of a ... 06/23/05 - 20050136877 - Frequency offset correction in transmitters and receivers having non-ideal synthesizer channel spacing In a receiver of a transmission system in which the data transmission rate is not an integer multiple of the spacing between transmission channels, a single oscillator is used to generate both the system clock used to process the data signal as well as the mixing signal used to downconvert ... 06/02/05 - 20050118976 - Receiving system and semiconductor integrated circuit device for processing wireless communication signal The invention provides a receiving system and a transmitting system capable of decreasing an offset between differential signals and between quadrature signals and improving a manufacturing yield and a semiconductor integrated circuit device for processing a wireless communication signal having therein the systems. A receiving system includes: a local oscillator ... ### FreshPatents.com Support |