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| Number | Title | Issue Date |
| 7626469 | Electronic circuit An electric circuit, for use in a phase lock loop circuit, the electric circuit comprising: a first circuit element, being a phase frequency detector or a charge pump; at least one LC resonant loop, the first circuit element forming part of the loop; and means arran... | 12/01/2009 |
| 7365610 | Push compensation in an oscillator The effect of supply voltage variations on an oscillator circuit output are compensated for to reduce supply pushing. The change in a value of a first capacitance in a first direction in response to the variation in the supply voltage is canceled using one or more d... | 04/29/2008 |
| 7307484 | Semiconductor integrated circuit device with noise reduction function A semiconductor integrated circuit device includes a semiconductor substrate; at least one integrated circuit block formed in the semiconductor substrate; a first electrode pad which receives a first clock, the first electrode pad being disposed on the semiconductor... | 12/11/2007 |
| 7274263 | Microstrip stabilized quantum well resonance-tunneling generator for millimeter and submillimeter wavelength range A microstrip stabilized quantum well resonance-tunneling generator which generates electromagnetic waves for millimeter and submillimeter wavelength range is provided The generator includes a resonant tunneling semiconductor quantum well diode, and a microstrip reso... | 09/25/2007 |
| 7253693 | Method and apparatus for noise compensation in an oscillator circuit A variable capacitance circuit includes a first and a second capacitor. A switch having an associated first nonlinear capacitance, selectively couples the first and second capacitors. To compensate for the first nonlinear capacitance, a second nonlinear capacitance ... | 08/07/2007 |
| 7209010 | Oscillator with tunable diffusion capacitance as resonant circuit capacitance An oscillator includes a resonant circuit of at least one inductance device and at least one tunable capacitance. The tunable capacitance is implemented through diffusion capacitances of at least one current-carrying transistor. The tunable capacitance has a first d... | 04/24/2007 |
| 7190083 | High frequency integrated circuit using capacitive bonding A high frequency integrated circuit includes a die, a package and capacitive bond. The die includes a circuit that processes a high frequency signal and also includes at least one bonding pad coupled to the circuit. The package includes a plurality of bonding posts,... | 03/13/2007 |
| 7173498 | Reducing the coupling between LC-oscillator-based phase-locked loops in flip-chip ASICs Disclosed are integrated circuits having multiple electromagnetically emissive devices, such as LC oscillators. The devices are formed on an integrated circuit substrate and are given different planar orientations from each other. Particular integrated circuit packa... | 02/06/2007 |
| 7132896 | Circuit for minimizing filter capacitance leakage induced jitter in phase locked loops (PPLs) A method, an apparatus, and a computer program are provided to minimize filter capacitor leakage in a Phased Locked Loop (PLL). In high frequency processors and devices, filter leakage currents can cause substantial problems by causing PLLs to drift out of phase loc... | 11/07/2006 |
| 7105852 | High speed electron tunneling devices A detector includes a voltage source for providing a bias voltage and first and second non-insulating layers, which are spaced apart such that the bias voltage can be applied therebetween and form an antenna for receiving electromagnetic radiation and directing it t... | 09/12/2006 |
| 7102453 | Oscillator circuit configuration The invention relates to an oscillator circuit configuration comprising in an LC-parallel oscillatory circuit and a transistor as an amplifying element. A compensating winding is associated with the parallel oscillatory circuit whereby the collector voltage of the t... | 09/05/2006 |
| 7067842 | Method and apparatus for monitoring parasitic inductance The present invention includes a method and apparatus for measuring a parasitic inductance associated with a portion of an integrated circuit fabricated on a semiconductor substrate. A test chip for measuring the parasitic inductance is fabricated together with the ... | 06/27/2006 |
| 6998927 | Techniques to provide increased voltage swings in oscillators Briefly, an oscillator device with impedance elements to prevent premature improper biasing of transistor nodes and to increase the maximum possible peak-to-peak signal swing. ... | 02/14/2006 |
| 6927640 | Apparatus and method for reducing phase noise in oscillator circuits A resonant oscillator circuit includes an active device and a resonator that causes the active device to oscillate at a resonant frequency of the resonator. The active device includes one or more transistors that are DC biased using one or more resistors. The bias r... | 08/09/2005 |
| 6798304 | Apparatus and method for reducing phase noise in oscillator circuits A resonant oscillator circuit includes an active device and a resonator that causes the active device to oscillate at a resonant frequency of the resonator. The active device includes one or more transistors that are DC biased using one or more resistors. The bias r... | 09/28/2004 |
| 6639476 | Correlator stabilized digitally tuned oscillator synthesizer A digitally tuned oscillator synthesizer having a correlator circuit and selectable voltage controlled oscillators is disclosed. The correlator circuit develops an accurate output which provides frequency stability for the synthesizer, whereas the voltage... | 10/28/2003 |
| 6639478 | Apparatus and method for reducing phase noise in oscillator circuits A resonant oscillator circuit includes an active device and a resonator that causes the active device to oscillate at a resonant frequency of the resonator. The active device includes one or more transistors that are DC biased using one or more resistors.... | 10/28/2003 |
| 6611179 | Voltage-controlled oscillator and communication apparatus incorporating the same A voltage-controlled oscillator has a structure that is very compact and prevents characteristic deterioration. The voltage-controlled oscillator includes a first resonant circuit resonating in a first frequency band, a second resonant circuit resonating ... | 08/26/2003 |
| 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 |
| 6507248 | Voltage-controlled crystal oscillator Disclosed is an integrated voltage-controlled crystal oscillator intended to present the conditions for circuit constants in an oscillator circuit that can improve the oscillator's frequency tuning range with respect to the variable capacitance range of a... | 01/14/2003 |
| 6437652 | Apparatus and method for reducing phase noise in oscillator circuits A resonant oscillator circuit includes an active device and a resonator that causes the active device to oscillate at a resonant frequency of the resonator. The active device includes one or more transistors that are DC biased using one or more resistors.... | 08/20/2002 |
| 6437651 | Oscillating circuit An electric potential of an epitaxial layer 2A provided under a bonding pad 5 to which a resonance circuit for a VCO is to be connected is fixed to a predetermined (Vcc) electric potential through a resistor 6 in a conventional floating state. Consequentl... | 08/20/2002 |
| 6215367 | Circuit for avoiding parasitic oscillation modes in an oscillator resonant circuit The reduction of interfering influences in an LC resonant circuit with an integrated circuit is effected by including the interfering elements of the housing in the resonant circuit. This precludes the occurrence of parasitic radio-frequency oscillation m... | 04/10/2001 |
| 6140882 | Phase lock loop enabling smooth loop bandwidth switching The present invention, generally speaking, provides a PLL that enables smooth switching of loop bandwidth without changing the loop filter. In accordance with one aspect of the invention, the loop bandwidth of a phase lock loop including an output frequen... | 10/31/2000 |
| 6124766 | Frequency converter circuit for cable modem tuner A local oscillation circuit in a frequency converter circuit includes a resonant circuit, and a differential amplifier circuit connected to the resonant circuit. The differential amplifier circuit includes two transistors constituting a differential stage... | 09/26/2000 |
| 6107892 | Method for reduction of phase noise in microwave voltage-controlled oscillators Phase noise in an RF oscillator is significantly reduced by loosely couping another quieter RF oscillator having noise patterns uncorrelated to the first RF oscillator so that it frequency locks with the first RF oscillator. The coupling is increased unti... | 08/22/2000 |
| 6091309 | Tunable low noise oscillator using delay lines and ring mode trap filter An oscillator comprises an active device with a phase shift of less than 180 degrees. A first delay line has first and second ends. The first end of the first delay line is coupled to an active port of the active device. A ring mode trap filter is coupled... | 07/18/2000 |
| 6046647 | Voltage-controlled oscillator A Voltage Controlled Oscillator (VCO) mitigates the effects of package parasitics by providing positive feedback connections, to sustain a desired oscillation, external to the IC package, thereby mitigating the effect of the bond wires and internal parasi... | 04/04/2000 |
| 5959503 | Voltage controlled oscillator tuning by metal lid aperture selection A method (100) for tuning a voltage controlled oscillator by changing electrical circuit parasitics includes a first step (102) of providing a voltage controlled oscillator circuit on a circuit board and a plurality of different metal lids each having dif... | 09/28/1999 |
| 5841322 | Phase detector using carrier suppression and oscillator using the phase detector A phase detector responsive to a first signal having a carrier frequency and a second signal close to the carrier frequency, including a carrier suppression circuit which produces a carrier suppressed signal from the first and second signals, and a mixer ... | 11/24/1998 |
| 5781074 | Low electromagnetic interference clock oscillator module A low noise clock oscillator in modular form to plug into a standard 14 or 8 pin DIP clock oscillator socket on the motherboard of a host device to retrofit the host device without redesign of the host device motherboard so that the host device can reduce... | 07/14/1998 |
| 5712598 | Driving apparatus for electrostatic converting means A driving circuit and a Self-oscillating circuit incorporating a piezoelectric oscillator having one terminal connected to ground. In the driving circuit, an alternating driving power is supplied to a first terminal of the piezoelectric oscillator, and th... | 01/27/1998 |
| 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 |
| 5675295 | Microwave oscillator, an antenna therefor and methods of manufacture A millimeter or microwave oscillator device for a receiver or a transmitter is described. The oscillator device including a high frequency oscillating circuit including an active device 41; said active device 41 having a first and a second contact 56, 52,... | 10/07/1997 |
| 5568096 | Apparatus and method for using negative FM feedback in high quality oscillator devices An apparatus and method are provided for increasing the effective Q-value of an oscillator so that the required Q-value can be reached with the use of a low Q-value oscillator. In this apparatus and method, the FM noise is measured at the output of the os... | 10/22/1996 |
| 5302921 | Piezoelectric oscillator having reduced radiation of higher harmonics A piezoelectric oscillator in which radiation of higher harmonic components is reduced. A piezoelectric vibrator and a semiconductor device are provided in an oscillation circuit for making the piezoelectric vibrator oscillate, as is a filter for cutting ... | 04/12/1994 |
| 5185585 | Crystal oscillator and method with amplitude and phase control Crystal oscillator and method which in one embodiment have a crystal element connected in a positive feedback loop with a charge amplifier and an integrator, with the gain of the loop being maintained at a level of unity. Compensation is provided to offse... | 02/09/1993 |
| 5053726 | Circuit for preventing VCXO mode jumping An oscillator includes a mechanical resonator, such as a crystal, and having an amplifier arranged for oscillating at a first frequency. A resonant circuit is coupled in series with the crystal. The resonant circuit is antiresonant at an undesired harmoni... | 10/01/1991 |
| 5047734 | Linear crystal oscillator with amplitude control and crosstalk cancellation A series-feedback crystal oscillator has a crystal element in series with a buffer amplifier. The oscillator maintains a linear oscillation signal by using an amplitude control circuit to hold the oscillation signal to a certain level at which distortion,... | 09/10/1991 |
| 4864256 | Oscillator with reduced harmonics An oscillator for producing an oscillating signal with reduced harmonics includes an oscillator stage coupled to an output stage having a relatively fast switching speed yet producing an oscillating signal having relatively slow rise and fall times so tha... | 09/05/1989 |
