Oscillators inventions 04/09

20090108945 - Frequency synthesizer: A frequency synthesizer switches the frequency at a high rate, is of low power consumption, and has a high signal-to-noise ratio. CMOS quadrature VCOs 31, 32 generate and output four-phase signals 36, 37, respectively. CMOS selector 33 selects either one of two four-phase signals 36, 37 generated by CMOS quadrature... Agent: Young & Thompson

20090108946 - Switch, negative resistance cell, and differential voltage controlled oscillator using the same: The present invention relates to a switch, a negative resistance cell, and a differential voltage controlled oscillator using the same. The present invention includes a first signal line provided in a first direction, a second signal line provided in parallel with the first signal line, and first to fourth gate... Agent: Rabin & Berdo, PC

20090108947 - Voltage controlled oscillator: A voltage controlled oscillator includes an LC-tank circuit, a cross-coupled pair circuit, and a trans-conductance adjusting circuit. The LC-tank circuit provides an inductance and a capacitance. The cross-coupled pair circuit is coupled to the LC-tank circuit and has a first transistor and a second transistor in a cross-coupled manner. The... Agent: North America Intellectual Property Corporation

20090108948 - Relaxation oscillator for compensating system delay: A relaxation oscillator compensates for system delay. The relaxation oscillator includes first and second input signal units that generates first and second capacitor voltages, a delay compensation unit that receives a reference voltage and the first and second capacitor voltages and that generates a compensation voltage. In certain embodiments, a... Agent: Mills & Onello LLP

20090108949 - Temperature compensation for crystal oscillators: Methods and apparatus for generating a temperature compensated frequency estimate for a crystal oscillator, wherein the temperatures of the crystal and oscillator are both accounted for. A crystal temperature measurement is used to generate a first frequency component. The difference between the oscillator temperature measurement and a second temperature is... Agent: Qualcomm Incorporated

20090108950 - Oscillation control apparatus and oscillator: An oscillation control apparatus is provided with: an oscillating unit for oscillating an oscillating element; an output amplifying circuit having two pieces of same types of transistors series-connected to each other, for outputting a signal from a junction point between the two transistors in response to an oscillation signal outputted... Agent: Mcdermott Will & Emery LLP

20090102569 - Phase adjustment in phase-locked loops using multiple oscillator signals: Phase-locked loop (PLL) logic comprises an oscillator that produces a first oscillator signal and phase detect logic that determines a phase difference between the first oscillator signal and a second oscillator signal. After the second oscillator signal is replaced by a third oscillator signal, the phase detect logic determines another... Agent: Hewlett Packard Company

20090102570 - Phase locked loop circuit and wireless communication system: In a PLL circuit including a VCO having a plurality of oscillation frequency bands, a TDC circuit calculates a phase difference between a predetermined reference signal from a fixed frequency divider and a PLL frequency-divided signal from a variable frequency divider on a rising edge of the reference signal and... Agent: Mcdermott Will & Emery LLP

20090102564 - Method and apparatus for compensating for tuning nonlinearity of an oscillator: Techniques to compensate for nonlinearity of a tuning function of an oscillator are described. The tuning nonlinearity of the oscillator may be modeled as a disturbance input to the oscillator and may be compensated with an equal but opposite disturbance. In one design, a nonlinearity correction signal to compensate for... Agent: Qualcomm Incorporated

20090102565 - Injection-locked frequency divider: An injection-locked frequency divider is provided. The injection-locked frequency divider includes a voltage control oscillator (VCO) and a mixer. The VCO includes a LC resonance tank and a negative-resistance generator for generating a differential oscillation signal including a first and a second oscillation signals. The LC resonance tank adjusts a... Agent: Jianq Chyun Intellectual Property Office

20090102566 - Oscillator phase matching: A system comprises a primary oscillator that provides a first signal having a first phase and a backup oscillator that provides a second signal having a second phase. The system also comprises trim logic coupled to the backup oscillator logic. Prior to failure of the primary oscillator, the trim logic... Agent: Hewlett Packard Company

20090102567 - Heating system for a double-ovenized oscillator on a single printed circuit board: A system is provided for the regulation of temperature of a crystal oscillator, that system having a thermally conductive support disposed upon a substrate and upon which is disposed the crystal oscillator, an array of thermal vias disposed around the crystal oscillator within the substrate, at least one primary heater... Agent: Vern Maine & Associates

20090102568 - Voltage controlled oscillator with cascaded emitter follower buffer stages: A voltage controlled oscillator (VCO) is provided that includes an output buffer having a first buffer stage including a first transistor and a second buffer stage including a second transistor. The first and second transistors are connected in a cascaded emitter follower buffer arrangement.... Agent: Autoliv Asp Inc

20090102571 - Cascode amplifier and differential cascode voltage-controlled oscillator using the same: Provided is a differential cascode voltage-controlled oscillator that can reduce a phase noise by the use of a quality factor enhancement technique with negative conductance and can mitigate a ground-caused noise effect by the use of a cascode connection technique. The differential cascode voltage-controlled oscillator includes an AC signal generator,... Agent: Staas & Halsey LLP

20090102572 - Parallel-structured switched variable inductor circuit: An inductor circuit includes a pair of inductors connected in parallel with each other and a switch for turning on and off electric power to one of the pair of inductors. The inductance of the inductor circuit can be varied and the quality factor Q can be improved. Further, RF... Agent: Sughrue Mion, PLLC

20090096538 - All-digital phase-locked loop, loop bandwidth calibration method, and loop gain calibration method for the same: For decreasing errors within an analog phase-locked loop, an all-digital phase-locked loop (ADPLL) with digital components and digital operations is used. The ADPLL may also be used for direct frequency modulation (DFM). By defining a proportional path gain of an ADPLL by a bandwidth and a reference frequency of the... Agent: North America Intellectual Property Corporation

20090096537 - Digital-controlled oscillator for eliminating frequency discontinuities and all-digital phase-locked loop using the same: A digital-controlled oscillator (DCO) is utilized in an all-digital phase-locked loop for eliminating frequency discontinuities. The DCO includes a tank module and a negative gm cell. The tank module comprises a plurality of cells, at least a portion of the cells comprising a first tracking set and a second tracking... Agent: North America Intellectual Property Corporation

20090096539 - Error protection method, tdc module, ctdc module, all-digital phase-locked loop, and calibration method thereof: An error predict code is added into a cycle signal for raising precision of an output signal of a time-to-digital (TDC) decoder. A cyclic TDC (CTDC) is specifically designed within a phase-frequency detector (PFD)/CTDC module of an all-digital phase-locked loop (ADPLL) for enhancing loop bandwidth calibration of the ADPLL. A... Agent: North America Intellectual Property Corporation

20090096540 - Logical level converter and phase locked loop using the same: A logical level converter generates an output signal by which a logical circuit accurately operates even if there is a threshold fluctuation factor. In the logical level converter, an output signal of a voltage control oscillator in a phase locked loop is inputted to a threshold variable inverter. A DC... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20090096534 - Voltage controlled oscillator circuit, phase-locked loop circuit using the voltage controlled oscillator circuit, and semiconductor device provided with the same: A VCO circuit includes: a control portion to which a first voltage is inputted and from which a second voltage corresponding to the first voltage is outputted; a current source portion to which the second voltage is inputted and from which a current corresponding to the second voltage is outputted;... Agent: Eric Robinson

20090096535 - All-digital phase-locked loop: For decreasing errors within an analog phase-locked loop, an all-digital phase-locked loop (ADPLL) with only digital components and digital operations is used. The ADPLL may also be used for direct frequency modulation (DFM). By modulating certain parameters within the ADPLL by following an all-pass frequency response, a loop gain of... Agent: North America Intellectual Property Corporation

20090096536 - Arrangement for phase synchronization according to the master/slave principle: An apparatus for the phase synchronization of several devices, wherein one device is the master device and the other devices are slave devices, with a phase synchronization unit for every device, each of which has: a first controlled oscillator for producing a master reference signal, a first phase detector which,... Agent: Marshall, Gerstein & Borun LLP

20090096541 - Crystal oscillator circuit having fast start-up and method therefor: In one embodiment, a method of programming an oscillator circuit includes providing a resonator, a first programmable capacitor, a second programmable capacitor, and an amplifier. The first programmable capacitor and the second programmable capacitor may be programmed at a first capacitance value during a first time period, wherein the first... Agent: Freescale Semiconductor, Inc. Law Department

20090096542 - Frequency stabilizing device of an oscillator: A frequency stabilizing device of an oscillator is disclosed. The frequency stabilizing device of an oscillator is used for stabilizing the frequency of an oscillator to keep the frequency in constant when input voltage is changed. The frequency stabilizing device comprises a plurality of transmission gates for receiving an input... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20090091395 - Microwave signal generator: The microwave signal generator includes a magnetron generating microwave signal. A filter filters a signal that may be a signal of the intrinsic oscillation frequency band of the magnetron, which is fed-back to the magnetron.... Agent: Mckenna Long & Aldridge LLP

20090091396 - Method and system for calibration of a tank circuit in a phase lock loop: A phase lock loop includes a calibration loop for calibrating a tank circuit for capacitance variation through process variations of manufacturing an integrated circuit including the phase lock loop. A capacitance profile for setting the frequency of the phase lock loop at a process corner, such as a typical process... Agent: Dla Piper LLP (us )

20090091397 - Oscillating apparatus and frequency convert apparatus: An oscillating apparatus for outputting an oscillating signal includes a resonant circuit that generates the oscillating signal, an amplifier circuit that amplifies the oscillating signal generated by the resonant circuit, and feeds the amplified oscillating signal back to the resonant circuit, and an output circuit that receives the oscillating signal... Agent: Jianq Chyun Intellectual Property Office

20090091398 - Oscillating apparatus: Provided is an oscillating apparatus that includes a plurality of variable frequency oscillators, each of which is provided in correspondence with a different oscillating band from one another; and a selection section that selects an oscillating signal that is from a variable frequency oscillator provided in correspondence with a designated... Agent: Jianq Chyun Intellectual Property Office

20090091399 - Low voltage synchronous oscillator for dc-dc converter: Systems and methods which provide an oscillator circuit outputting non-overlapping trigger signals throughout a range of operating voltages using a reset-set (RS) flip-flop type circuit configuration are shown. Embodiments utilize output driver buffers internal to the RS flip-flop circuit configuration to provide oscillator feedback delay. Feedback control circuitry may be... Agent: Fulbright & Jaworski L.l.p

20090085679 - Dual path phase locked loop (pll) with digitally programmable damping: In a method and apparatus for controlling damping and bandwidth in a phase locked loop (PLL), a loop filter is configured to have a dual path for charge pump current. A 3 dB bandwidth of the PLL is controlled by adjusting gain of a proportional current path. An integral current... Agent: Texas Instruments Incorporated

20090085677 - Locked loop system: This disclosure relates to a phase locked loop and a frequency locked loop.... Agent: Lee & Hayes, PLLC

20090085678 - Method and system for signal generation via a digitally controlled oscillator: Aspects of a method and system for digitally controlling a VCO are provided. In this regard, a phase difference between two signals may be determined, represented digitally, and utilized to adjust the output frequency of a LOGEN. In this regard, the output frequency may be adjusted by controlling one or... Agent: Mcandrews Held & Malloy, Ltd

20090085672 - Frequency synthesizer: By performing rough adjustment of a local oscillation frequency by a first lock loop using an up/down counter (5) and micro adjustment of the local oscillation frequency by a second lock loop using an S/H circuit (11), it is possible to eliminate the need of operation of charging and pumping... Agent: Connolly Bove Lodge & Hutz LLP

20090085673 - Method and system for signal generation via a pll with ddfs feedback path: Aspects of a method and system for signal generation via a PLL with a DDFS feedback path are provided. In this regard, a phase difference between a reference signal and a feedback signal may be utilized to control a VCO, wherein the feedback signal is generated by a DDFS. Voltage,... Agent: Mcandrews Held & Malloy, Ltd

20090085674 - Method and system for signal generation via a pll with digital phase detection: Aspects of a method and system for signal generation via a PLL with a digital feedback path are provided. In this regard, an output of a VCO may clock an accumulator to generate a digital feedback signal for phase comparison with a digital reference signal, wherein a value of a... Agent: Mcandrews Held & Malloy, Ltd

20090085675 - Method and system for signal generation via a pll with undersampled feedback: Aspects of a method and system for signal generation via a PLL with undersampled feedback are provided. In this regard, the output of a VCO may clock a DDFS to generate a sampling frequency, and the output of the VCO may be undersampled at the sampling frequency to generate a... Agent: Mcandrews Held & Malloy, Ltd

20090085676 - Oscillator: An oscillator of the present invention includes a constant current circuit in which a constant current generated in the constant current circuit varies positively with an on threshold voltage of a transistor included in the constant circuit; and an oscillating circuit in which the oscillating frequency of a clock signal... Agent: Fish & Richardson P.C.

20090085680 - Oscillator generating normal clock signal: Disclosed is an oscillator including a reference voltage generator generating a reference voltage, and a logic combination circuit generating complementary first and second internal clock signals in response to the reference voltage and complementary first and second output voltages. One of the first and second output voltages—the one going high—is... Agent: Volentine & Whitt PLLC

20090085681 - High-resolution digitally controlled oscillator and method thereof: A digitally controlled oscillator provides high resolution in frequency tuning by using a digitally controlled capacitive network that includes a tunable capacitive circuit, a first capacitor and a second capacitor. The tunable capacitive circuit generates a variable capacitance according to a digital control word. The first capacitor is coupled in... Agent: Knobbe Martens Olson & Bear LLP

20090085682 - Injection-locked frequency divider with a wide injection-locked frequency range: An injection-locked frequency divider includes a signal injection circuit and colpitts VCO. The signal injection circuit is for injecting an injection signal. The colpitts VCO includes first and second transistors, first and second LC tank circuits and a cross-coupled transistor pair. The first terminals of the first and second transistors... Agent: Bacon & Thomas, PLLC

20090085683 - Resonator, oscillator and communication device: A resonator containing a plurality of resonator elements, respectively having an electrode and an oscillating component opposed while having a space in between, arranged so as to form a closed system. The oscillating component of the plurality of resonator elements is continuously formed in an integrated manner.... Agent: Sonnenschein Nath & Rosenthal LLP

20090085684 - Low power rtc oscillator: The integrated circuit package includes a processing core for operating on a set of instructions to carry out predefined processes. An internal oscillator provides a system clock for the integrated circuit package. A programmable load capacitor array provides a programmable load to tune an oscillation frequency of the internal oscillator.... Agent: Howison & Arnott, L.l.p

20090085685 - System and method for calibrating bias current for low power rtc oscillator: The integrated circuit package includes a processing core for operating on a set of instructions to carry out predefined processes. A real time clock circuit provides a system clock for the processing core. The real time clock further comprises an internal oscillator that generates the system clock for the integrated... Agent: Howison & Arnott, L.l.p