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| Number | Title | Issue Date |
| 8183948 | Ultra-compact PLL with wide tuning range and low noise A design for an oscillator, and a PLL incorporating such an oscillator, which takes up little physical area but maintains a large tuning range and low phase noise. Two LC-tanks are nested and switched. Through tuning the inactive tank, the range of the active tank m... | 05/22/2012 |
| 8149069 | Low-noise voltage-controlled oscillating circuit A low noise voltage-controlled oscillating circuit which can remove a power source noise to improve low frequency noise characteristics is disclosed. A capacitor C11 is provided between a base of a driving transistor Q1 and GND, whereby a low frequency... | 04/03/2012 |
| 8111110 | Low-noise voltage controlled oscillator A low-noise voltage controlled oscillator is provided, to improve a phase noise characteristic and widen a frequency variable range. The low-noise voltage controlled oscillator is configured so that an oscillation element and a capacitor 2 are connected in se... | 02/07/2012 |
| 8106718 | GM-boosted differential drain-to-source feedback colpitts voltage controlled oscillator A voltage controlled oscillator outputting a differential signal includes: an inductor connected to a first power supply supplying first voltage; first and second transistors for differential switching; first and second variable capacitors connected to the inductor ... | 01/31/2012 |
| 8072280 | Voltage-controlled oscillator A voltage-controlled oscillator comprises a variable inductor, a negative impedance circuit, an operating voltage source and a ground point. The variable inductor comprises a transformer and a transistor switch, the transformer comprising a primary side coil and a s... | 12/06/2011 |
| 8044739 | Capacitor switching circuit A capacitance switching element includes first and second capacitors connected in series by transistors. The gates of the transistors are biased by a first signal through one set of resistors, and the sources and drains are biased by a second signal through a second... | 10/25/2011 |
| 8035457 | Voltage controlled oscillator A voltage controlled oscillator (VCO) includes a voltage controlled current source (VCCS), a negative resistance circuit (NRC), a first transformer, a second transformer, a first transistor and a second transistor. A current terminal of the VCCS receives a control v... | 10/11/2011 |
| 7978017 | Control voltage generator for a clock, frequency reference, and other reference signal generator Exemplary embodiments of the invention provide a reference signal generator, system and method. An exemplary apparatus to generate a harmonic reference signal includes a reference resonator, such as an LC-tank, a control voltage generator adapted to provide a temper... | 07/12/2011 |
| 7956698 | High-frequency voltage-controlled oscillation circuit A high-frequency voltage-Controlled oscillation circuit which does not oscillate abnormally, is improved in phase noise, and has a small circuit scale. A phase shift circuit composed of third or more order odd π low-Pass filter and capacitive variable-reactance ele... | 06/07/2011 |
| 7915967 | Frequency-tunable oscillator arrangement A frequency-tunable arrangement comprises a resonance circuit having a capacitive part that is tunable throughout a capacitance range. A plurality of amplifiers is coupled to the resonance circuit so as to form an oscillation loop. At least one of the amplifiers is ... | 03/29/2011 |
| 7884680 | Dynamically adjustable Q-factors One embodiment relates to a circuit for active loss compensation. The circuit includes a parallel inductor-capacitive (LC) tank circuit having a first single-ended output. A first adjustable capacitor, which includes a first terminal and a second terminal, is couple... | 02/08/2011 |
| 7872540 | Oscillator device and transmitter module using same An oscillator device includes a resonator including a coil and a capacitor connected to the coil in parallel; and an oscillator connected to the resonator. Electric waves are emitted from the coil to at least one receiving antenna of the receiver while the oscillato... | 01/18/2011 |
| 7872541 | Inductor and capacitor-based clock generator and timing/frequency reference In various embodiments, the invention provides a clock generator and/or a timing and frequency reference comprising an LC oscillator with a frequency controller to control and provide a stable resonant frequency. Such stability is provided over variations in a selec... | 01/18/2011 |
| 7863994 | System and method for increasing radio frequency (RF) microwave inductor-capacitor (LC) oscillator frequency tuning range System and method for increasing the frequency tuning range of a RF/microwave LC oscillator. A preferred embodiment comprises a voltage controlled oscillator (VCO) configured to generate an output signal at a frequency that is dependent upon a magnitude of an input ... | 01/04/2011 |
| 7855610 | VCO capacitor bank trimming and calibration Techniques are disclosed for trimming a capacitance associated with a capacitor bank for use in a voltage-controlled oscillator (VCO). In an embodiment, each capacitance is sub-divided into a plurality of constituent capacitances. The constituent capacitances may be... | 12/21/2010 |
| 7847650 | Low phase-noise oscillator A tail-tank coupling technique combines two complementary differential LC-VCOs to form a quadrature LC-VCO. The technique reduces phase noise by providing additional energy storage for noise redistribution and by cancelling noise injected by transistors when they op... | 12/07/2010 |
| 7839229 | Voltage-controlled oscillator and communication device using the same The present invention provides a voltage-controlled oscillator operating from microwave frequencies to millimeter wave frequencies, which is capable of outputting a large power with an output impedance thereof being set up to a predetermined level at low power consu... | 11/23/2010 |
| 7821349 | 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. ... | 10/26/2010 |
| 7808335 | Circuit arrangement and signal processing device A circuit arrangement and signal processing device are disclosed. In one embodiment, the circuit arrangement includes a resonator circuit for generating an output signal from an input signal with a capacitance and with an inductance, with an input at which the input... | 10/05/2010 |
| 7755442 | Receiver with colpitts differential oscillator, colpitts quadrature oscillator, and common-gate low noise amplifier Embodiments of the present invention include a common-gate amplifier having an input terminal and an output terminal, a transistor having a source, a drain, and a gate, four inductors, and two capacitors, and a negative amplification circuitry. The negative amplific... | 07/13/2010 |
| 7741923 | Transistor voltage-controlled oscillator and frequency synthesizer having the same A transistor voltage-controlled oscillator (VCO) and a frequency synthesizer having the transistor VCO are provided. The frequency synthesizer adopts a divide-by-five injection-locked frequency divider, which includes a five-stage inverter ring oscillating frequency... | 06/22/2010 |
| 7710211 | 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-coupl... | 05/04/2010 |
| 7671689 | Transistor voltage controlled oscillator A FET transistor voltage-controlled oscillator is provided that includes a crossed-coupled inductor capacitor tank (LC-Tank) transistor voltage-controlled circuit having a first transistor and a second transistor, as well as a transistor frequency multiplying circui... | 03/02/2010 |
| 7636021 | Low noise and low phase hits tunable oscillator A voltage controlled oscillator compising a distributed coupled resonator (DCR) that desirably produces a low noise signal source with reduced phase hits in comparison to a high Q resonator, such as a ceramic and SAW (Surface Acoustic Wave) resonator based oscillato... | 12/22/2009 |
| 7629859 | Integrated resonance circuit An integrated resonance circuit is provided for providing a high-frequency output signal, comprising a first output for providing a first high-frequency output signal with a first frequency and a first amplitude, a first inductive unit connected to the first output,... | 12/08/2009 |
| 7609120 | Voltage-controlled oscillator using LC resonator Provided is a voltage-controlled oscillator (VCO) using an LC resonator circuit which includes a first resonance circuit in which two serially connected varactor diodes and an inductor are connected in parallel, a second resonance circuit in which one or more induct... | 10/27/2009 |
| 7583156 | Oscillator with multi-tap inductor, capacitors, and negative-Gm stages System and method for increasing the frequency tuning range of a RF/microwave LC oscillator. An electronic communications device includes a controller to regulate the operation of the electronic communications device, a modem coupled to the controller, a radio frequ... | 09/01/2009 |
| 7561001 | Electronic oscillator circuit device An electronic circuit device includes a negative resistance generating circuit, a second transistor and a path. The negative resistance generating circuit has a first transistor having a control terminal coupled to a resonator. The second transistor has a control te... | 07/14/2009 |
| 7561000 | Oscillator circuit for a sensor An oscillator circuit for a sensor, with a tuned circuit and an operational amplifier, the electrical oscillation of the tuned circuit is capable of being tapped between a first terminal and a second terminal of the tuned circuit, and the first terminal of the tuned... | 07/14/2009 |
| 7557668 | Injection-locked frequency divider An injection-locked frequency divider is provided. The injection-locked frequency divider includes a variable reactance unit, a signal injection unit, a first switch, a second switch, a first transformer, and a second transformer. The variable reactance unit, the fi... | 07/07/2009 |
| 7535308 | Voltage-controlled oscillator decreasing phase noise A voltage-controlled oscillator includes an LC bank, a negative resistor circuit, a DC block, an AC block including a source resistor, and a first bias circuit controlled by a junction node of a first and second transistor, wherein the first bias circuit provides a ... | 05/19/2009 |
| 7518458 | Oscillator and data processing equipment using the same and voltage control oscillator and data processing equipment using voltage control oscillator An LC resonant circuit of an oscillator includes a parallel circuit of an inductor, a first fine adjustable capacitor and a first capacitor bank, and a series circuit of a second fine adjustable capacitor and a second capacitor bank. A frequency conversion gain of t... | 04/14/2009 |
| 7489209 | High stability fast start up oscillator for implants An oscillator for use within an implantable medical device is provided. The oscillator includes a resonator and a first switch coupled to a first resistive network. The first resistive network provides a first electrical path through the first switch and a second el... | 02/10/2009 |
| 7474164 | Radar oscillator A radar oscillator has an oscillation unit and first and second switch circuits. The first switch circuit turns off an electric power supply to an amplifier in a non-input period of a pulse signal to set the oscillation unit in a non-oscillation state and turns on t... | 01/06/2009 |
| 7463107 | Resonant circuit and oscillator having a resonant circuit The invention is directed to a resonant circuit having a frequency-determining element which has at least one switchable frequency-changing element connected in parallel therewith. The frequency-changing element has two series-connected transistors whose control con... | 12/09/2008 |
| 7463106 | Push-push voltage controlled oscillator for obtaining differential signals Disclosed is a push-push voltage controlled oscillator which obtains output signals having a frequency two times the fundamental resonance frequency of an LC resonator with differential signals having the same amplitude and opposite phases, creating the advantage of... | 12/09/2008 |
| 7432768 | Voltage controlled digital analog oscillator and frequency synthesizer using the same Provided are a voltage controlled digital analog oscillator and a frequency synthesizer using the same, the oscillator comprising an oscillator having a frequency of an output signal being determined by a voltage inputted to an analog input end and a digital value i... | 10/07/2008 |
| 7426373 | Electrically tuned resonance circuit using piezo and magnetostrictive materials An impedance tuning system, especially for a cellular telephone system. The system can be used to match the impedance of an antenna element with that of an output stage of a transmitter driving the antenna element. The system includes a piezo capacitor in parallel w... | 09/16/2008 |
| 7423495 | Oscillator and method for generating an oscillator signal An oscillator includes a first resonator circuit, a second resonator circuit coupled to the first resonator circuit and a reconfigurable network having a transconductance and coupled to at least one of the resonator circuits. Reconfiguration of the reconfigurable ne... | 09/09/2008 |
| 7414488 | Low phase noise differential LC tank VCO with current negative feedback A differential voltage controlled oscillator (VCO) employed in a frequency synthesizer used as a local oscillator of a wireless communication on-chip transmitter/receiver is provided. More particularly, a differential current negative feedback VCO equipped with a cu... | 08/19/2008 |
