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| Number | Title | Issue Date |
| 7283008 | Oscillator circuit with temperature compensation function An oscillator circuit comprising a resonant circuit which includes a negative resistor, an inductor and an oscillation frequency setting capacitor whose capacitance is varied according to a control voltage based on oscillation frequency data and which outputs a sign... | 10/16/2007 |
| 7242171 | Power converter circuit and method for power conversion The present invention provides an improved form of inverter circuit which refines the known conventional circuit to reduce its offset and then uses a combination of this refined circuit and a feedback type power converter to achieve low output offset, very high spee... | 07/10/2007 |
| 7149317 | CMOS high impedance circuit A high impedance circuit includes a diode-connected MOSFET circuit. This circuit may be used in a buffer amplifier of a hearing aid microphone, coupled across an input of the buffer amplifier and providing a high input impedance. ... | 12/12/2006 |
| 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 |
| 7075380 | Widely tuneable and fully differential LC oscillator utilizing an active inductor An inductor-capacitor voltage controlled oscillator is implemented using an active inductor. The active inductor may use bipolar technology or CMOS technology. The VCO with an active inductor offers a more compact design and is useable with flip chip technology. The... | 07/11/2006 |
| 7030725 | Semiconductor device with electrically coupled spiral inductors Multiple coupled inductors are formed in a well in a semiconductor device. The inductors, which preferably are spiral inductors, are strongly coupled with high quality factors. The coupled inductors may be used as efficient signal splitting and combining circuits. | 04/18/2006 |
| 7023316 | Semiconductor device with electrically coupled spiral inductors Multiple coupled inductors are formed in a well in a semiconductor device. The inductors, which preferably are spiral inductors, are strongly coupled with high quality factors. The coupled inductors may be used as efficient signal splitting and combining circuits. | 04/04/2006 |
| 7012487 | Transconductance device employing native MOS transistors A system on chip such as a radio receiver has reduced suceptibility to voltages in the bulk silicon by using gyrator elements in the receiver with each gyrator element including a plurality of current sources interconnected to provide output transconductance voltage... | 03/14/2006 |
| 6980062 | Oscillator circuit with temperature compensation function An oscillator circuit comprising a resonant circuit which includes a negative resistor, an inductor and an oscillation frequency setting capacitor whose capacitance is varied according to a control voltage based on oscillation frequency data and which outputs a sign... | 12/27/2005 |
| 6949983 | High-frequency piezoelectric oscillator In the high-frequency piezoelectric oscillator, capacitors C1, C2 as a part of a load capacitor are connected between a base of a transistor TR1 and the ground. The connection point of the capacitors C1, C2 is connected to an emitt... | 09/27/2005 |
| 6946924 | Low noise voltage controlled oscillator A voltage controlled oscillator, comprising a pair of transistors connected to a tank circuit, said tank circuit including a plurality of tuning diodes connected in parallel with an inductor, said tuning diodes having cathodes connected to a common connection. ... | 09/20/2005 |
| 6933793 | Method of overtone selection and level control in an integrated circuit CMOS negative resistance oscillator to achieve low jitter A stable high-frequency clock pulse apparatus and method including frequency source, overtone crystal unit coupled with a negative resistance oscillator, a bandpass overtone filter and a drive level control is provided. The apparatus can include a frequency multipli... | 08/23/2005 |
| 6606007 | Crystal oscillator with minimized Q reduction A circuit and method are disclosed herein for a crystal oscillator, wherein the Q of the resonant network is not reduced through the loading effects of the oscillator's resistive bias network. The oscillator is configured as an operational transconductanc... | 08/12/2003 |
| 6552621 | Low phase noise, wide tuning range oscillator utilizing a one port SAW resonator and method of operation There is disclosed a SAW resonator-based oscillator circuit having low phase noise that is tunable across a comparatively wide frequency range. The oscillator circuit comprises: 1) a tuning element coupled to the input port and having a variable capacitan... | 04/22/2003 |
| 6411170 | Oscillation circuit In order to provide an oscillation circuit that is capable of achieving stable oscillation over a large frequency range, oscillating operation is carried out by connecting an LC resonance circuit, of which resonance frequency is adjustable, to the collect... | 06/25/2002 |
| 6317008 | Clock recovery using an injection tuned resonant circuit A tuning signal is injected into an LC tank circuit oscillator, e.g., through an impedance (either reactive, inductive, capacitive and/or resistive) to tune the phase and/or frequency of the LC tank circuit oscillator. A negative resistance is included in... | 11/13/2001 |
| 6239664 | Low phase noise, wide tuning range oscillator utilizing a one port saw resonator and method of operation There is disclosed a SAW resonator-based oscillator circuit having low phase noise that is tunable across a comparatively wide frequency range. The oscillator circuit comprises: 1) a tuning element coupled to the input port and having a variable capacitan... | 05/29/2001 |
| 6175285 | Injection tuned resonant circuits An AC tuning signal is injected into an LC tank circuit oscillator through an impedance (either reactive, inductive, capacitive and/or resistive) to tune the phase and/or frequency of the LC tank circuit oscillator. A negative resistance is included in pa... | 01/16/2001 |
| 6169461 | High-frequency oscillating circuit A high-frequency oscillating circuit that is not degraded by external electromagnetic interference. The high-frequency oscillating circuit includes first and second oscillating transistors wherein the bases are connected together directly or via a capacit... | 01/02/2001 |
| 6107893 | Voltage tunable active inductorless oscillator An inductorless voltage controlled oscillator that may be fabricated using CMOS circuit elements. In one aspect, the present invention includes a synthetic inductance formed on a substrate and having first and second power supply terminals and a signal po... | 08/22/2000 |
| 5959504 | Voltage controlled oscillator (VCO) CMOS circuit A voltage controlled oscillator (VCO) CMOS circuit wherein back gate terminals of CMOS transistors are used to vary the parasitic capacitances of the transistors. The back gate terminals receive a signal from a variable voltage source so that oscillation ... | 09/28/1999 |
| 5920235 | Voltage controlled oscillator integrated circuit A voltage controlled oscillator has a cross-coupled negative resistance cell formed as an integrated circuit connected to off-chip components of a high-Q resonant tank circuit. To counteract spurious oscillations brought about by package parasitics caused... | 07/06/1999 |
| 5883549 | Bipolar junction transistor (BJT)--resonant tunneling diode (RTD) oscillator circuit and method A BJT, an inductor, and an RTD are configured to define a negative resistance oscillator circuit that is suitable for monolithic integration. The BJT is forward biased so that the RTD operates at a DC operating point (IQ,VQ) on its c... | 03/16/1999 |
| 5635879 | Voltage controlled oscillator formed of two differential transconductors A monolithic CMOS phase-lock loop (PLL) circuit provides a high frequency of operation suitable for RF applications. The PLL produces an output clock with high spectral purity and very low jitter. The output clock has a low static phase error relative to ... | 06/03/1997 |
| 5479129 | Variable propagation delay digital signal inverter An electronically-controlled variable propagation delay digital signal inverter comprises a digital signal inverter having an input signal port and an output signal port, and an electronically-controlled negative resistance (ECNR). The ECNR is coupled to ... | 12/26/1995 |
| 5414392 | Amplifier circuit An electrical circuit comprising means for receiving an input signal for encoding or modulating and amplification. Multiple amplification stages including at least one transconductance amplifier are provided. There are means for having the input signal mo... | 05/09/1995 |
| 5343170 | Voltage controlled oscillator provided with negative feedback biasing A voltage controlled oscillator (VCO) including a negative feedback circuit operates in response to a negative feedback signal generated during active transistor region operation of transistors in transconductance amplifying stages coupled thereto. As a r... | 08/30/1994 |
| 5117205 | Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits An electrically controllable oscillator circuit (30) comprises two balanced transconductance circuits (G1, G2), each including transistor pairs arranged as inverters (Inv14) and as resistors (Inv5-6). The oscillation frequency (f) and the quality factor (... | 05/26/1992 |
| 4801898 | Voltage-controlled oscillator A voltage-controlled oscillator includes a negative resistance generator, a resonant circuit, a first series circuit, a second series circuit, and a third series circuit. The first series circuit controls an oscillation frequency for changing a resonant f... | 01/31/1989 |
| 4760353 | Integrated gyrator oscillator An oscillator is disclosed comprising a pair of gm stages wherein the output of the second gm stage is coupled to the inverting input of the first stage and the output of the latter is coupled to the non-inverting input of the former; first and second cap... | 07/26/1988 |
| 4751480 | One port magnetostatic wave resonator An overcoupled resonator having a resonant cavity defined by a thin film of magnetic material with a pair of end walls parallel to a transducer. Because this resonator is overcoupled, it is suitable for use in a broadband oscillator.... | 06/14/1988 |
| 4608543 | Controllable effective resistance and phase lock loop with controllable filter Disclosed is a circuit providing a controllable effective resistance which comprises of transistor means that provides current at an input node responsive to an input voltage at the input node. The transistor means is coupled to a settable current source ... | 08/26/1986 |
| 4518930 | Negative resistance circuit for VCO A high-frequency negative resistance circuit for use in a voltage controlled crystal oscillator has a pair of input terminals thereby defining an input current and input voltage. The high-frequency negative resistance circuit includes a sensing circuit fo... | 05/21/1985 |
| 4485356 | Variable low frequency sinusoidal oscillator using simulated inductance A low frequency sinusoidal oscillator, comprises a circuit which contains operational amplifiers, resistors and capacitors and has no inductor. The circuit, however, operates as an inductor. The circuit is arranged to resonate at a frequency which may be ... | 11/27/1984 |
| 4394660 | Phased array feed system A combined phase shifter and signal source are formed by injection locking a variable frequency oscillator. The free running frequency control of the oscillator operates as a phase control when the oscillator is injection locked. The invention functions a... | 07/19/1983 |
| 4091341 | Oscillator circuit arrangements including nullator-norator pairs The invention relates to electrical oscillators arranged to oscillate so as to produce a substantially sinusoidal output signal. The said oscillator includes a general impedance transvertor circuit arrangement having two differential amplifiers connected ... | 05/23/1978 |
| 4091340 | Oscillator circuit arrangements including nullator-norator pairs The invention relates to electrical oscillators arranged to oscillate so as to produce a substantially sinusoidal output signal. The said oscillator includes a general impedance transvertor circuit arrangement having two differential amplifiers connected ... | 05/23/1978 |
| 3967210 | Multimode and multistate ladder oscillator and frequency recognition device A ladder oscillator composed of capacitive and inductive impedances connected together to form a ladder network which has a chosen number N oscillation modes at N different frequencies. Each oscillation mode is characterized by a unique standing wave volt... | 06/29/1976 |
