Class 331/108A - Use of complimentary-type transistors

Subclass of Class 331 - Oscillators
No. of patents: 45
Last issue date: 09/02/2008

Number	Title	Issue Date
7420429	Source coupled differential complementary colpitts oscillator A source coupled differential complementary Colpitts oscillator is described, which enables a differential oscillation and also can improve phase noise performance by source-coupling a complementary Colpitts oscillator using an inductor. A differential complementary...	09/02/2008
7355488	Differential amplifier for use in ring oscillator A differential amplifier circuit for use in a ring oscillator includes first and second MOS transistors to each source of which an operating power source voltage is applied, and which individually respond to first and second input signals with mutually contrary phas...	04/08/2008
7106142	Ring-type voltage oscillator with improved duty cycle A ring-type voltage-controlled oscillator with a good duty cycle for use in a PLL frequency synthesizer. The delay cell circuit used in the ring-type VCO comprises two first inverters, two resistance units, and a differential delay circuit. The inverters receive res...	09/12/2006
7102450	Method and apparatus for providing clock signals at different locations with minimal clock skew A tapped phase shift ring oscillator may be used to provide multiple clock signals having variable phase delays. Phase delays may be selected to compensate for clock skews at different locations on high speed chips, or to provide clock signals having specific, desir...	09/05/2006
6903614	Oscillator having an AC-coupling between fundamental frequency ground points A method of locking a first differential oscillator with a second differential oscillator and a circuit and an arrangement therefor. The method comprises AC coupling a fundamental frequency AC-ground of the first differential oscillator with a fundamental frequency ...	06/07/2005
6731179	System and method for measuring circuit performance degradation due to PFET negative bias temperature instability (NBTI) A ring oscillator (and test circuit incorporating the ring oscillator and test method therefor) includes an odd number of elements interconnected in a serially-connected infinite loop, each oscillator element having an associated programmable delay feature. The circ...	05/04/2004
6664862	Oscillator with constant output level over oscillation frequency range An oscillator includes an oscillation circuit unit and an amplification circuit unit of the common-base type. The oscillation circuit unit includes an oscillation transistor and a resonance circuit, the collector of the oscillation transistor being ground...	12/16/2003
6556091	Low noise oscillator having dissimilar MOS gate structures An oscillator which is used for a portable telephone or the like, comprises a transistor fabricated by MOS process, and entails a low level of noise other than the desired oscillation frequency. The oscillator includes quartz oscillating element 1 and a f...	04/29/2003
6525617	Buffering for LC-based stage A two-stage ring oscillator system that provides a phase shift of 90° in each of the two stages. Each stage includes an LC-based stage including a voltage controlled oscillator (VCO) and an in-line signal buffer that provides an additional controllable p...	02/25/2003
6310523	Wide-range and low-power consumption voltage-controlled oscillator A wide-range and low power consumption voltage-controlled oscillator according to the invention includes a logic control circuit, a parallel series controllable inverter bank and a voltage control load. The logic control circuit consists of a plurality of...	10/30/2001
5999062	Crystal oscillator driver with amplitude control A crystal oscillator drive circuit controls the maximum amplitude of the drive signal to a crystal by limiting the bias current of a gm cell which senses the oscillation amplitude of the crystal. The bias current is commutated by the gm cell responsive to...	12/07/1999
5900787	Dual-mode, crystal resonator/external clock, oscillator circuit An oscillator circuit, having an inverter with input and output terminals interconnected through a feedback resistance, operates in two modes. In a first mode, the input and output terminals are coupled to an external crystal resonator. In a second mode, ...	05/04/1999
5896069	Cross coupled differential oscillator A multi-stage apparatus used as a voltage controlled oscillator. Each stage includes a first complementary differential current switch and a second complementary differential current switch with a second set of complementary differential current switches ...	04/20/1999
5721516	CMOS inverter A CMOS inverter capable of reducing a through current therein including an E-type PMOS transistor, an E-type NMOS transistor and a D-type NMOS transistor. In the E-type PMOS transistor, the gate and the drain are connected to input and output terminals. I...	02/24/1998
5677650	Ring oscillator having a substantially sinusoidal signal A ring oscillator comprising an odd number of inverters connected in a ring, and apparatus for driving the ring oscillator so that it oscillates at a frequency slightly less than its maximum oscillating frequency such that harmonics of the oscillating fre...	10/14/1997
5654677	Relaxation oscillator of reduced complexity using CMOS equivalent of a four-layer diode A relaxation oscillator of reduced complexity is described which can be constructed as part of a silicon integrated circuit. The current controlled oscillator includes complementary field effect transistors operating in enhancement mode. The drain of one ...	08/05/1997
5606292	Ring oscillator having its output amplified in a comparator A ring oscillator for a semiconductor device comprising a ring oscillation circuit for generating a pulse signal according to a logic state of a control signal, the pulse signal having a predetermined period and a reduced operating voltage level, a compar...	02/25/1997
5457429	Ring oscillator circuit for VCO In a ring oscillator type VCO in which plural stages of inverter circuits are cascade-connected to each other so as to constitute a positive feedback loop, delay amounts for both a rising edge and a falling edge of an output signal from the inverter circu...	10/10/1995
5426398	High speed differential mode voltage controlled ring oscillator A differential mode voltage controlled oscillator (VCO) includes an odd number of delay cells. Each delay cell has a pair of input terminals and a pair of output terminals with the input terminals of each delay cell being connected to the output terminals...	06/20/1995
5341113	Voltage controlled oscillator having a 50% duty cycle A voltage controlled oscillator (VCO) (2) provides an output signal which has a 50% duty cycle and a frequency which depends on the voltage of a control signal (V) supplied thereto. The VCO (2) comprises first (CL) and second (CR) ca...	08/23/1994
5302920	Controllable multi-phase ring oscillators with variable current sources and capacitances An electrically controlled oscillator circuit having multi-phase outputs with programmable frequency. The circuit includes a ring oscillator having a plurality of inverting stages. Each stage has an output which is connected to a switch that can be progra...	04/12/1994
5300898	High speed current/voltage controlled ring oscillator circuit A differential inverter such as may be used in an oscillator circuit. The differential inverter is connected between first and second current sources. The differential inverter includes first and second single signal CMOS inverters connected in parallel b...	04/05/1994
5278522	High frequency voltage controlled oscillator A phase lock loop operates independent of temperature and process variation by digitally loading a VCO until reaching the desired operating frequency. The VCO reaches a high output frequency even under worst case processing by controlling multiple current...	01/11/1994
5272453	Method and apparatus for switching between gain curves of a voltage controlled oscillator A method and apparatus for switching between gain curves of a switched gain voltage controlled oscillator (VCO) 52, 52' or 52". In one form, the present invention uses a switched gain voltage controlled oscillator (VCO) 52, 52' or 52" which utilizes a rin...	12/21/1993
5220291	Complementary transistor oscillator An oscillator of the feedback amplifier type is described that employs a complementary bipolar transistors pair in which the collectors have a common connection with the output terminal. The oscillator operates from a single power supply, provides near ra...	06/15/1993
4965535	Multiple speed oscillator A CMOS oscillator is disclosed using an inverter in which a pair of control terminals are employed to invoke various sized devices which control the flow of current. The inverter gain is determined by the size of the CMOS devices employed. A tuned circuit...	10/23/1990
4956618	Start-up circuit for low power MOS crystal oscillator A CMOS crystal oscillator circuit for producing a 32 KHz clock signal operates at low power over a range of power supply voltages without overdriving the crystal. To accomplish this, the complementary MOS transistors in the oscillator inverter are supplie...	09/11/1990
4910471	CMOS ring oscillator having frequency independent of supply voltage A CMOS ring oscillator includes an odd number of serially connected inverter stages with each stage comprising a CMOS transistor pair. The output of each stage is taken at the common terminal of the CMOS transistor pair with capacitive means shunting the ...	03/20/1990
4891609	Ring oscillator A ring oscillator circuit comprises a plurality of inverter states (301, 302, 303) connected in a series loop. Each stage has a voltage input (315, 315', 315") with an associated input capacitance and input threshold voltage, and a current output (316, 31...	01/02/1990
4887053	High frequency VLSI oscillator Maximum frequency range in a VLSI voltage controllable crystal oscillator is obtained with a two-stage amplifier with feedback across both stages. The first stage is implemented by an MOS transistor connected in source-follower configuration to minimize i...	12/12/1989
4853655	High frequency CMOS oscillator Maximum frequency range in a CMOS voltage-controllable crystal oscillator is obtained with a two-stage amplifier with feedback across both stages. The first stage is connected in source-follower configuration to minimize input capacitance, and the second ...	08/01/1989
4845444	Frequency doubling crystal oscillator via a current mirror A crystal oscillator comprising a crsytal and an inverter amplifier which utilizes a current mirror to provide a voltage output having a frequency double the frequency of the voltage waveform present in the inverter amplifier....	07/04/1989
4594565	Clock oscillator for a cardiac pacer having frequency compensation for temperature and voltage fluctuations A temperature and voltage stable clock circuit for use in implantable cardiac pacers employs CMOS devices to minimize current drain. The circuit includes a timing capacitor which is alternately charged to and discharged between two established threshold v...	06/10/1986
4571557	Wide band transistor oscillator An oscillator includes two transistors or like devices having their emitters connected to a common of a power source. The two transistors or like devices are interconnected with the base of the first connected to the collector of the second and the base o...	02/18/1986
4471326	Current supplying circuit as for an oscillator A circuit for supplying first and second currents to a load comprises two current generators for providing those currents during first and second time intervals and a resistance through which those currents flow. Two control potentials developed by two se...	09/11/1984
4418323	Oscillator having capacitor charged and discharged by current mirror circuits An oscillator circuit adapted for use as a voltage controlled oscillator in which all of the transistors of the oscillator circuit are operated in non-saturated regions so that the minority carrier accumulation time does not affect the maximum operating f...	11/29/1983
4318170	Power inverter oscillator circuit A power inverter oscillator circuit has an output transformer with a primary winding, coupled in parallel with a capacitor, and the opposite ends of which are connected to the respective emitters of a PNP and a NPN transistors. The collector of the NPN tr...	03/02/1982
4147996	Current-controlled oscillator A pulsing oscillator employs a capacitor that is charged through a diode from a current-source circuit and repeatedly discharges through a PNP and an NPN transistor when the capacitor voltage reaches a predetermined voltage. Another transistor is connecte...	04/03/1979
4106278	Electronic timepiece utilizing semiconductor-insulating substrate integrated circuitry An electronic timepiece wherein the timekeeping circuitry utilizes semiconductor-insulating substrate integrated circuitry for effecting high frequency operation is provided. The timepiece includes an oscillator circuit adapted to produce a high frequency...	08/15/1978
4052673	Combined controlled oscillator and frequency multiplier A voltage controlled oscillator which, for example, may be utilized in a phase locked loop, includes an odd number (n) of cascaded COS-MOS inverter stages with a feedback path coupling the output of the last stage to the input of the first stage to form a...	10/04/1977

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Class 331/108A - Use of complimentary-type transistors