Class 331/53 - Frequency multiplier

Subclass of Class 331 - Oscillators
Definition: Cascaded oscillators wherein at least one succeeding oscillator
No. of patents: 27
Last issue date: 02/19/2008

Number	Title	Issue Date
7332977	Crystal clock generator operating at third overtone of crystal's fundamental frequency A crystal oscillator operates at the third overtone of the crystal's fundamental frequency. A value of a shunt resistor between the two phase-shift leg nodes is chosen so that the absolute value of the product gm×(Xc1)×(Xc2) is greater than the effec...	02/19/2008
7295824	Frequency multiplier pre-stage for fractional-N phase-locked loops A WLAN (Wireless Local Area Network) communication device comprising a WLAN frequency synthesizer for generating a synthesizer signal suitable for modulating a transmission signal and/or demodulating a reception signal and corresponding methods and integrated circui...	11/13/2007
7253842	Locking display pixel clock to input frame rate To match the output frame rates to the input frame rates, a display clock signal is generated that has a frequency locked to the frequency of a reference clock signal. To generate the display clock signal, the period of the vertical incoming data clock is measured u...	08/07/2007
7196590	Multi-frequency sythesis using symmetry in arrays of coupled nonlinear oscillators Certain spatio-temporal symmetries induce one array of a two-array coupled network of oscillators to oscillate at N times the frequency of the other array, where N is the number of oscillators in each array. ...	03/27/2007
7167410	Memory system and memory device having a serial interface A memory device and system are disclosed that may include a serial data interface, a serial address interface, and a reference clock interface. The reference clock interface is configured to receive a signal from a reference clock source that provides a reference cl...	01/23/2007
7164324	CMOS single-ended frequency doubler A CMOS single-ended frequency doubler with improved subharmonic rejection and low phase noise which allows a single ended reference signal to be utilized in a Balanced Colpitts oscillator. The input is reproduced with a 180-degree phase shift for the opposite Colpit...	01/16/2007
7009429	Method and circuit for compensating MOSFET capacitance variations in integrated circuits A method for tracking the MOS oxide thickness by the native threshold voltage of a “native” MOS transistor without channel implantation for the purpose of compensating MOS capacitance variations is achieved. The invention makes use of the fact that in MOS device...	03/07/2006
6987424	Narrow band clock multiplier unit A clock multiplier unit (CMU) used for a high speed communications system is supplied with an input reference clock and utilizes a narrowband phase-locked loop (PLL) to multiply the reference clock to supply a higher speed output clock used, e.g., as a FIFO read clo...	01/17/2006
6972606	Delay circuits and related apparatus for extending delay time by active feedback elements A delay circuit and related apparatus for providing a longer delay time, such that when a level of an input signal changes, a level of an output signal changes accordingly after the predetermined delay time. The delay circuit has a storage unit, a current generator,...	12/06/2005
6788154	Phase-locked loop with composite feedback signal formed from phase-shifted variants of output signal A phase-locked loop system and method are provided. The system may include an error detector configured to receive a reference signal, and a voltage-controlled oscillator subsystem coupled to the error detector. The voltage-controlled oscillator subsystem is typical...	09/07/2004
6661298	Method and apparatus for a digital clock multiplication circuit A clock multiplication technique includes driving two oscillatory circuits by an input signal. One of the circuits has an inverted input. The oscillatory circuits are characterized by a transfer function having an unstable region bounded by two stable reg...	12/09/2003
6535037	Injection locked frequency multiplier A frequency multiplication circuit is disclosed. The circuit includes a ring oscillator formed of an even number of phase shifting stages. Each phase shifting stage provides a high frequency output comprised of harmonics of the oscillation frequency of th...	03/18/2003
6407596	Apparatus and method for a clock period subdivider An electronic circuit generates additional clock edges from a reference clock signal utilizing switch-capacitor techniques. The electronic circuit includes a first capacitance circuit and a second capacitance circuit separated by a switch. During a first ...	06/18/2002
6392498	Method and apparatus for a digital clock multiplication circuit A clock multiplication technique includes driving two oscillatory circuits by an input signal. One of the circuits has an inverted input. The oscillatory circuits are characterized by a transfer function having an unstable region bounded by two stable reg...	05/21/2002
6346833	Frequency multiplier circuit A frequency multiplier circuit outputs a desired frequency, wherein a frequency of a reference clock is divided by 4 by a frequency divider, the frequency of a unit clock is divided by 2 by another frequency divider and the output of these dividers are pr...	02/12/2002
6137309	Exclusive-or logic gate with four two-by-two complementary inputs and two complementary outputs, and frequency multiplier incorporating said gate An Exclusive-OR logic gate with four two-by-two complementary inputs and two complementary outputs. The structure of this Exclusive-Or gate is said to be symmetrical in that the gate has a propagation time that is identical whichever of the two pairs of c...	10/24/2000
5973570	Band centering frequency multiplier A frequency multiplier (120) having a tunable resonant circuit (122), is anticipated for use with a frequency synthesizer (100) having a Voltage Controlled Oscillator (110). The VCO control line (116) voltage establishes the VCO (110) fundamental frequenc...	10/26/1999
5903196	Self centering frequency multiplier A frequency multiplier (120) having a tunable resonant circuit (122), is anticipated for use with a frequency synthesizer (100) having a Voltage Controlled Oscillator (110). The VCO control line (116) voltage establishes the VCO (110) fundamental frequenc...	05/11/1999
5859571	Frequency trimmable oscillator and frequency multiplier A pure MOS-implementable oscillator requires no trimming to make the oscillation frequency Vdd independent, but permits trimming to compensate for process and fabrication variations. A current generator creates a core reference current Iosc0, mirrored pro...	01/12/1999
5563612	Frequency multiplier circuitry for radio beacons A portable emergency position indicating radio beacon (EPIRB) that transmits two signals at different frequencies whereby one frequency is twice the frequency of the other and wherein the beacon incorporates a push-push frequency multiplier to multiply th...	10/08/1996
4562412	Oscillator synchronized to a pulse An oscillation circuit has a free-running oscillator operating at a predetermined frequency. A signal generator generates a trigger signal in synchronism with an input signal. The trigger signal is supplied to the free-running oscillator to bring the sign...	12/31/1985
4516085	Microwave frequency synthesizer using plural switchable low noise oscillators Disclosed is a low noise microwave frequency synthesizer having a plurality of rapidly switchable output frequencies. Two banks of oscillators are selectively mixed to yield a range of output signals of low phase noise and low spurious noise. The first ba...	05/07/1985
4453138	Broadband injection locked oscillator system The broadband injection locked oscillator system comprises a first voltage controlled oscillator having a signal output for a first signal controlled to have a first frequency in a first relatively broad frequency range, and a second voltage controlled os...	06/05/1984
4054847	Pulse oscillator circuit A pulse oscillator circuit comprises a first pulse oscillator, which may be in the form of a monostable multivibrator, that is capable of generating a first pulse. A second pulse oscillator, which may be in the form of an astable multivibrator, is operati...	10/18/1977
4040075	Frequency converter A frequency converter utilizing a novel four terminal semiconductor device having an emitter grounded current amplification characteristic which is V-shaped wherein the gate terminal of the four terminal device is biased to the low point of the emitter gr...	08/02/1977
4032859	1 TO 18 GHz microwave signal generator A device for generating a signal varying in frequency from 1 to 18 GHz at a onstant output power. The device utilizes a tracking automatic level loop and reacquire loop which provide automatic alignment of a YIG multiplier filter with a YIG voltage-control...	06/28/1977
3970954	Digital frequency multiplier A circuit arrangement for multiplying the repetition rate of an input signal by digital techniques is disclosed. A digital counter driven by a high speed clock generates a count proportional to the input period. This count or a different count generated b...	07/20/1976

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Class 331/53 - Frequency multiplier