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| Number | Title | Issue Date |
| 8436689 | Multiple phase voltage controlled oscillator including a resonant circuit and negative resistance circuit A voltage controlled oscillator includes a resonant circuit including one or more transformers and a plurality of variable capacitor circuits connected in parallel to the one or more transformers and generating a plurality of oscillation signals having multiple phas... | 05/07/2013 |
| 8400226 | Oscillation circuit and associated method An oscillation circuit and associated method, wherein the oscillation circuit provides a pair of oscillation signals at two oscillation nodes, and includes a first capacitor, a switch circuit and a second capacitor serially coupled between the two oscillation nodes;... | 03/19/2013 |
| 8390386 | Variable inductor A variable inductor includes: a first inductor having two ends connected to a first terminal and a second terminal; a second inductor having two ends connected to the first terminal and the second terminal; a first node provided on the first inductor; a second node ... | 03/05/2013 |
| 8350632 | Energy-conserving driver for reactive loads A dipole oscillation tank circuit includes a first capacitive structure, an inductive structure, and a second capacitive structure connected in series. The tank circuit transfers electric energy back and forth between the capacitive structures in dipole oscillation ... | 01/08/2013 |
| 8339208 | Method and apparatus for tuning frequency of LC-oscillators based on phase-tuning technique A tunable multiphase ring oscillator includes a plurality of stages connected in series in a ring structure, where each stage generating a stage output from a stage input. Each stage of the tunable multiphase ring oscillator includes a plurality of trans-conductance... | 12/25/2012 |
| 8339209 | Method for selecting natural frequency in resonant clock distribution networks with no inductor overhead An inductor architecture for resonant clock distribution networks is described. This architecture allows for the adjustment of the natural frequency of a resonant clock distribution network, so that it achieves energy-efficient operation at multiple clock frequencie... | 12/25/2012 |
| 8305151 | Resonance type oscillation circuit and semiconductor device A resonance type oscillation circuit includes an inductance element which is connected between a first terminal and a second terminal, an amplifier circuit which is connected in parallel with the inductance element between the first terminal and the second terminal,... | 11/06/2012 |
| 8299862 | Tuning circuit for inductor capacitor (LC) tank digitally controlled oscillator In one embodiment, an apparatus includes a first circuit of a digitally controlled oscillator (DCO). The first circuit has a loss component. A second circuit is coupled to the first circuit and configured to transform a positive impedance into a negative impedance i... | 10/30/2012 |
| 8294528 | Wideband multi-mode VCO A VCO includes a transformer-based resonator that has a first LC tank and a second LC tank. The resonator has an even resonant mode and an odd resonant mode. The VCO further includes an active transconductance network that is coupled to a two-terminal port of the fi... | 10/23/2012 |
| 8294527 | Oscillator circuit There is provided an oscillator circuit including: a current source; a resonant unit; an oscillation amplification unit connected to the current source while being connected in parallel to the resonant unit; a feedback resistor connected in parallel to the oscillati... | 10/23/2012 |
| 8264290 | Dual positive-feedbacks voltage controlled oscillator A dual positive-feedbacks voltage controlled oscillator includes an oscillation circuit and a cross coupled pair circuit. The oscillation circuit includes a first transistor, a second transistor, an inductor and a plurality of capacitors. The gates of the first and ... | 09/11/2012 |
| 8258885 | Frequency-coupled LCVCO In one embodiment, a method includes generating, by a LCVCO, a first signal having a first phase based on a resonant frequency of a first LC tank; generating, by a second LCVCO, a second periodic signal having a second phase based on a resonant frequency of a second... | 09/04/2012 |
| 8222963 | Voltage-controlled oscillator A voltage-controlled oscillator includes a resonator section in which a plurality of types of variable capacitance elements having different structures and capacitance variation characteristics are connected in parallel and capacitance values of the plurality of typ... | 07/17/2012 |
| 8217728 | LC voltage-controlled oscillator An LC voltage-controlled oscillator (VCO) is provided. The LC VCO includes an LC resonant circuit including at least one inductor whose both terminals are connected to output nodes and at least one capacitor connected in parallel with the inductor, and an amplifier ... | 07/10/2012 |
| 8212625 | Differential VCO and quadrature VCO using center-tapped cross-coupling of transformer Provided are a differential voltage-controlled oscillator (VCO) and a quadrature VCO using center-tapped cross-coupling of a transformer. The differential VCO and the quadrature VCO can be driven by low power through a current reuse structure and have an excellent p... | 07/03/2012 |
| 8169269 | Hartley voltage controlled oscillator In a Hartley voltage controlled oscillator (VCO) circuit comprising two inductors (Ld, Lg), a transistor (Q1) and a varactor (C), the two inductors (Ld, Lg) are arranged as a coupled inductor pair to enable positive... | 05/01/2012 |
| 8159308 | Low power voltage controlled oscillator (VCO) An apparatus includes a tank circuit of a voltage controlled oscillator (VCO). A pair of alternating current (AC) coupling capacitors couple the gates of the pair of transistors to the drains of the pair of transistors. A bias circuit is coupled to the gates of the ... | 04/17/2012 |
| 8149067 | Voltage-controlled oscillator A voltage-controlled oscillator that can achieve low phase noise while ensuring stable oscillation startup and stable oscillation maintenance even under low supply voltage conditions. The voltage-controlled oscillator includes an LC parallel resonant circuit, whose ... | 04/03/2012 |
| 8143960 | Voltage controlled oscillator with multi-tap inductor According to one exemplary embodiment, a voltage controlled oscillator configured to operate in low and high band modes includes a low band section and a high band section. The voltage controlled oscillator further includes a multi-tap inductor having a high inducta... | 03/27/2012 |
| 8138845 | Method and apparatus for auto-frequency calibration for multi-band VCO A method and apparatus for auto-frequency calibration for multi-band VCO have been disclosed where a VCO is first adjusted to a major frequency band and then adjusted to a sub-band within the major frequency band. ... | 03/20/2012 |
| 8130049 | Submillimeter-wave signal generation by linear superimposition of phase-shifted fundamental tone signals Generation of Terahertz range (300 GHz to 3 THz) frequencies is increasingly important for communication, imaging and spectroscopic systems, including concealed object detection. Apparatus and methods describe generating multiple phase signals which are phase-locked... | 03/06/2012 |
| 8102216 | Voltage controlled oscillator having reduced phase noise A VCO comprises an LC tank circuit coupled to a plurality of cross-coupled transistor devices. A first resonance frequency of a waveform output of the VCO is dependent upon the values of a first capacitor and a first inductor of the LC tank. The VCO further comprise... | 01/24/2012 |
| 8098106 | Low noise voltage controlled oscillator (VCO) In one embodiment, a voltage controlled oscillator (VCO) includes a tank circuit having a first node and a second node. A first pair of transistors includes a first transistor and a second transistor each having a gate, a drain, and a source. The gates of the first ... | 01/17/2012 |
| 8089324 | Varactor-free amplitude controlled oscillator(ACO) for system on chip and system on card Xtaless clock SOC The fundamental breakthrough in green technology are the Varactor Free Amplitude Controlled Oscillator VFACO and the planar EMI-Free Planar Inductor. The VFACO makes the fine tune for oscillation frequency. It has the frequency compensation over temperature. It does... | 01/03/2012 |
| 8089323 | Green technology: green circuit and device designs of green chip Green Design is to save the resource and energy for earth. Applying the recycling of energy concept to the electrical and electronic device and circuit, we can save many nuclear power plants to save the earth and human society. Comparing with today power amplifier P... | 01/03/2012 |
| 8081039 | High efficiency harmonic voltage controlled oscillator (VCO) In one embodiment, a voltage controlled oscillator (VCO) is provided. The VCO includes a tank circuit. Also, the VCO includes a first pair of transistors. The drains of the first pair of transistors are coupled to the tank circuit and the gates of the first pair of ... | 12/20/2011 |
| 8076982 | Voltage-controlled variable frequency oscillation circuit and signal processing circuit A voltage-controlled variable frequency oscillation circuit, includes: an oscillation circuit section including a resonance circuit which includes a coil and a variable capacitance element, and a negative resistance circuit; and a first resistor connected between th... | 12/13/2011 |
| 8058938 | Voltage controlled oscillator A voltage controlled oscillator (VCO) includes a first and a second n-type transistor, a first and a second p-type transistor, a first and second capacitive element, a bridge connecting (1) the ground-facing connection of the first n-type transistor and power-facing... | 11/15/2011 |
| 8044732 | Continuously tunable inductor and method to continuously tune an inductor A continuously tunable inductor with an inductive-capacitive (LC) voltage controlled oscillator (VCO) having a primary coil. The inductor includes a separate isolated secondary coil, a set of transistors composing a closed loop with the secondary coil, a magnetic co... | 10/25/2011 |
| 8044733 | Stress tolerant differential colpitts voltage controlled oscillators Some of the embodiments of the present disclosure provide an apparatus comprising a voltage controlled oscillator (VCO) having a first transistor, a first resistor operatively coupled between a first terminal of the first transistor and a first node, a first capacit... | 10/25/2011 |
| 8035456 | Multi-phase signal generator and voltage-controlled oscillator thereof A VCO comprising a cross-coupled transistors module and a resonant module is provided. The resonant module comprises a first transistor, second transistor, a first inductor and varactor string and a second inductor and varactor string. The first source/drain termina... | 10/11/2011 |
| 8031019 | Integrated voltage-controlled oscillator circuits Techniques for providing voltage-controlled oscillator circuits having improved phase noise performance and lower power consumption. In an exemplary embodiment, a voltage controlled oscillator (VCO) is coupled to a mixer or a frequency divider such as a divide-by-tw... | 10/04/2011 |
| 8031020 | Bias circuit to reduce flicker noise in tunable LC oscillators In one embodiment, the present invention includes noise reduction circuits and methods. In one embodiment, cross coupled switching transistors incorporate bias voltages between the control terminal of each transistor and the drain of the other transistor. The bias v... | 10/04/2011 |
| 8022778 | Low phase noise frequency synthesizer Various apparatuses and methods for a low phase noise frequency synthesizer are disclosed herein. For example, some embodiments provide an oscillator that may be used in a low phase noise frequency synthesizer. The oscillator includes a tank circuit, a plurality of ... | 09/20/2011 |
| 8018293 | Configurable wide tuning range oscillator core An oscillator includes a resonator, a first and a second p-type transistor, and a first and a second n-type transistor. The resonator has a first terminal and a second terminal. The first p-type transistor is switchably connected to the first terminal while the seco... | 09/13/2011 |
| 7982548 | Resonant oscillator with oscillation-startup circuitry Some embodiments of the present invention provide a system that implements a resonant oscillator circuit. This system includes a first inductor with a constant potential terminal coupled to an input voltage, and a time-varying potential terminal coupled to a first p... | 07/19/2011 |
| 7907026 | Broadband voltage controlled oscillator and method for generating broadband oscillation frequency The present invention relates to a broadband voltage controlled oscillator and a method for generating a broadband oscillation frequency; and, more particularly, to a broadband voltage controlled oscillator and a method for generating a broadband oscillation frequen... | 03/15/2011 |
| 7893782 | Voltage-controlled oscillator A voltage-controlled oscillator comprises an inductor and a group of variable capacitance elements forming a resonance circuit. The group of variable capacitance elements includes first and second variable capacitance elements connectable in parallel and having mutu... | 02/22/2011 |
| 7884677 | Method and apparatus for reducing phase noise in an oscillator signal of a Colpitts oscillator A Colpitts oscillator includes a tank circuit, a first transistor, and a first feedback circuit. The first transistor includes a first region, a second region, and a control region. The first region communicates with the tank circuit. The first feedback circuit comm... | 02/08/2011 |
| 7760038 | Voltage controlled oscillator capable of tuning negative resistance Provided is a voltage controlled oscillator having a new type of a resonator and a negative resistance part capable of finely tuning negative resistance. Thus, the voltage controlled oscillator has an excellent quality factor characteristic and can finely tune the n... | 07/20/2010 |
