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| Number | Title | Issue Date |
| 8085103 | Resonant oscillator circuit with reduced startup transients Some embodiments of the present invention provide a system that implements a resonant oscillator circuit. This resonant oscillator circuit includes: a first inductor, a second inductor, a first capacitance, and a second capacitance, wherein the first and second indu... | 12/27/2011 |
| 8031018 | Oscillator with coupled amplifier An oscillator including a resonator with at least one first tuneable element, with which a resonant frequency of the resonator can be varied. The oscillator further includes an amplifier, which provides an amplification element, connected to the resonator at a coupl... | 10/04/2011 |
| 8018292 | Oscillator and communication system using the same A transfer impedance from input terminals of a resonator to output terminals of the resonator is larger than a driving-point impedance of the input terminals of the resonator at an oscillation frequency. The input terminals of the resonator are connected with the dr... | 09/13/2011 |
| 7978015 | Oscillator with reduced phase noise characteristics One well known problem associated with voltage controlled oscillators or VCOs is phase noise, and it is desirable to reduce phase noise in order to improve VCO performance. Here, a VCO is provided where gain elements are provided that reduce phase noise. These gain ... | 07/12/2011 |
| 7952445 | Method and arrangement for a voltage controlled oscillator circuit In a voltage controlled oscillator circuit comprising two transistors, the first terminals of each said two transistors, are coupled together and to a supply voltage, two interconnected resonator units, and each of said two resonator units couples a respective secon... | 05/31/2011 |
| 7944318 | Voltage controlled oscillator, and PLL circuit and radio communication device each including the same A voltage controlled oscillator includes an inductor circuit, C-coupling type variable capacitance circuits, a direct-coupling type variable capacitance circuit, and a negative resistance circuit, which are connected in parallel, and a reference voltage generating s... | 05/17/2011 |
| 7915966 | Oscillator for controlling voltage The present invention relates to a resonance type voltage control oscillator. The voltage control oscillator includes an inductor unit including two inductances serially coupled to each other, a variable capacitance unit coupled to the inductor unit in parallel, a n... | 03/29/2011 |
| 7852165 | Capacitive-degeneration double cross-coupled voltage-controlled oscillator A capacitive-degeneration double cross-coupled voltage-controlled oscillator is provided. The capacitive-degeneration double cross-coupled voltage-controlled oscillator includes a main cross-coupled oscillating unit including an oscillation transistor pair cross-cou... | 12/14/2010 |
| 7755440 | Voltage controlled oscillator for controlling phase noise and method using the same A voltage controlled oscillator (VCO) includes a VCO unit having multiple VCO unit output terminals and an amplifier having multiple amplifier output terminals respectively connected to the VCO unit output terminals. The VCO unit generates first output signals havin... | 07/13/2010 |
| 7737797 | Controllable oscillating system and related method for selectively adjusting currents passing through cross-coupling driving device A controllable oscillating system for generating a differential oscillating signal is disclosed. The controllable oscillating system includes an oscillating circuit and a current adjusting device. The oscillating circuit includes a controllable resonator, a cross-co... | 06/15/2010 |
| 7724102 | Oscillator circuit An apparatus described herein is an LC tank circuit that may include a capacitance, a first inductance, and a second inductance. The first inductance and the second inductance may each be center tapped coils. ... | 05/25/2010 |
| 7710210 | Apparatus for distributing a signal An apparatus is provided that includes an injection locked oscillator and a transmitting device. The injection locked oscillator to receive a first clock signal and to provide a second clock signal by skewing the first clock signal. The transmitting device to receiv... | 05/04/2010 |
| 7701304 | Voltage controlled oscillator, and PLL circuit and radio communication apparatus using the same A voltage controlled oscillator has a reference voltage generation section for generating a plurality of reference voltage based on a power supply voltage. Reference voltages Vref1, Vref2, and Vref3 are inputted to variable capacitance circuits ... | 04/20/2010 |
| 7692504 | Oscillator system, method of providing a resonating signal and a communications system employing the same An nth-order oscillator system for providing a resonating signal, a method of generating a resonating signal and a communications system. In one embodiment, the nth-order oscillator system, n being greater than two, includes (1) an amplifier co... | 04/06/2010 |
| 7683729 | Injection locked LC VCO clock deskewing In general, in one aspect, the disclosure describes an apparatus that includes an inductive capacitive voltage controlled oscillator (LC VCO) to generate an output clock. A voltage to current converter is used to receive a forwarded clock and to inject the forwarded... | 03/23/2010 |
| 7663445 | Voltage-control oscillator circuits with combined MOS and bipolar device A voltage controlled oscillator includes: a first merged device having a first bipolar transistor and a first MOS transistor, the first bipolar transistor having a collector sharing a common active area with a source/drain of the first MOS transistor, and an emitter... | 02/16/2010 |
| 7652544 | Voltage controlled oscillator and frequency control method of the voltage controlled oscillator A voltage controlled oscillator of the present invention includes power supply terminal (101), control terminal (2) for controlling an output frequency, output terminals (3a, 3b), cross-coupled transistors (5a, | 01/26/2010 |
| 7649424 | Method of adjusting the resonance frequency of an L-C resonant circuit and resonant circuit An L-C resonant circuit with an adjustable resonance frequency, having a capacitor and a first inductor electrically coupled together and a second inductor magnetically coupled to the first inductor. Additionally, there is a control circuit to sense a signal represe... | 01/19/2010 |
| 7646256 | Controlled oscillation module A controlled oscillation module includes a current source, an inductive load, a switching transistor section, and an adjustable parameter module. The switching transistor section is operably coupled to the current source and to the inductive load to convert a contro... | 01/12/2010 |
| 7626470 | Voltage-controlled oscillator for multi-band and RF communication apparatus having the same A voltage-controlled oscillator (VCO) for a multi-band receiver, and a radio-frequency (RF) communication apparatus having the same. The VCO includes at least two fine tune branches, that is, a main fine tune branch and an auxiliary fine tune branch. The main fine t... | 12/01/2009 |
| 7595700 | LC quadrature oscillator having phase and amplitude mismatch compensator Embodiments of the invention may provide for an LC quadrature oscillator that includes two LC oscillators that are cross-coupled with each other to generate I/Q clock signals and a phase and amplitude mismatch compensator. The phase and amplitude mismatch detector m... | 09/29/2009 |
| 7532080 | LC oscillator circuit with a compensation coil for parasitical collector capacitor 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 transistor is fed to said ... | 05/12/2009 |
| 7511589 | DFY of XtalClkChip: design for yield of trimming-free crystal-free precision reference clock osillator IC chip A Design For Yield (DFY) of Crystal Chip (XTALCHIP (Trademark for a chip equivalent to a crystal resonator)) is to have the high yield of high quality high accurate clock chip to be able to integrated in the SOC environment to save the production cost and board spac... | 03/31/2009 |
| 7508279 | Resonance circuit with variable diodes A resistance having a high impedance is connected between anode terminals of two variable capacitance diodes sharing a cathode, and the components described above are sealed in one package. The resistance can be formed of a diffusion region between p-regions of the ... | 03/24/2009 |
| 7504899 | 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... | 03/17/2009 |
| 7501907 | Self-biased active VCO level shifter A voltage-controlled oscillator (VCO) circuit includes first, second, third, and fourth transistors, wherein said third and fourth transistors bias the second and first transistors, respectively. First and second capacitances communicate with the first, second, thir... | 03/10/2009 |
| 7489207 | Structure for voltage controlled oscillator Disclosed are design structures for systems and methods of generating a periodic signal. ... | 02/10/2009 |
| 7456697 | Variable degeneration impedance supply circuit using switch and electronic circuits using the same A variable degeneration impedance supply circuit, including: two alternatively connected transistors; a capacitor circuit having a predetermined capacitance and serially connecting output terminals of the two transistors; and a switch for controlling on/off state be... | 11/25/2008 |
| 7436266 | LC quadrature VCO having startup circuit Provided is an Inductor-Capacitor (LC) quadrature Voltage Controlled Oscillator (VCO) having a startup circuit which can accurately select one of +90° and −90° as a phase difference between two clocks generated by the LC quadrature VCO by embodying the startup c... | 10/14/2008 |
| 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 |
| 7429899 | Reduced eddy current loss in LC tank circuits Placing inductors or resistors in parallel causes the combined value of inductance or resistance to decrease according to the parallel combination rule. This invention decreases the parasitic resistance of an inductor by placing several inductors in parallel. Furthe... | 09/30/2008 |
| 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 |
| 7411468 | Low voltage low-phase-noise oscillator There is a disclosed an oscillator for generating a periodic signal, comprising a transistor and two electro-magnetically coupled inductors in positive feedback configuration, one of the inductors is connected to the drain or gate of the transistor, and the other be... | 08/12/2008 |
| 7408422 | Variable-capacitance circuit element An electronic circuit element has two capacitance values selected by means of a main control signal. The electronic circuit element comprises two variable-capacitance electronic components connected in parallel and each receiving opposite intermediate control signal... | 08/05/2008 |
| 7405632 | Voltage-controlled oscillator, transmitter, and receiver A voltage-controlled oscillator includes (i) a first variable-capacity element, (ii) a resonance circuit whose resonance frequency changes in accordance with a control voltage applied to the first variable-capacity element, (iii) a second variable-capacity element c... | 07/29/2008 |
| 7400209 | Oscillator circuit Present invention relates to an oscillator circuit comprising: resonator means (102) and, first and second emitter followers (116, 118) being symmetrically coupled to the resonator means and been connected to further emitter followers (120, 122)... | 07/15/2008 |
| 7397318 | Voltage-controlled oscillator A voltage-controlled oscillator including a voltage-controlled oscillation section, a frequency control bias circuit, a temperature compensation bias circuit, and a temperature compensation bias generation circuit. The temperature compensation bias generation circui... | 07/08/2008 |
| 7385452 | Voltage controlled oscillator using capacitive degeneration A VCO is based on a capacitively emitter degenerated topology which uses a cross-coupled MOS pair as the degeneration cell. The cross-coupled MOS pair contributes additional conductance and results in a higher maximum attainable oscillation frequency and better nega... | 06/10/2008 |
| 7382206 | Voltage controlled oscillator with body of transistors bias control In a voltage controlled oscillator, a resonant circuit generates a resonant frequency in response to a tuning voltage. A differential oscillator includes first and second transistors differentially cross-coupled to the resonant circuit. The first and second transist... | 06/03/2008 |
