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| Number | Title | Issue Date |
| 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 |
| 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 |
| 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 |
| 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 |
| 7701303 | Oscillator with Darlington nodes A voltage-controlled oscillator has a resonance tank core providing a voltage-dependent resonance frequency, switching units connected with the resonance tank core for changing output voltage levels of the oscillator with a frequency corresponding to the resonance f... | 04/20/2010 |
| 7688153 | Automatically tuned tail filter The present invention relates to an oscillating circuit arrangement having a resonating arrangement with a first resonance frequency (coo) comprising a voltage controlled oscillator arrangement. It further comprises a tunable filter arrangement connected to the sour... | 03/30/2010 |
| 7679465 | Oscillator circuit The present invention relates to an oscillator circuit having a resonant element, an active element, a feedback loop, and an additional loop comprising a phase shifting element. ... | 03/16/2010 |
| 7511588 | Flux linked LC tank circuits forming distributed clock networks CMOS LC tank circuits and flux linkage between inductors can be used to distribute and propagate clock signals over the surface of a VLSI chip or processor. The tank circuit offers an adiabatic behavior that recycles the energy between the reactive elements and mini... | 03/31/2009 |
| 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 |
| 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 |
| 7420429 | Source coupled differential complementary colpitts oscillator A source coupled differential complementary Colpitts oscillator is described, which enables a differential oscillation and also can improve phase noise performance by source-coupling a complementary Colpitts oscillator using an inductor. A differential complementary... | 09/02/2008 |
| 7394328 | Oscillator circuit and test apparatus An oscillator circuit that generates an oscillation signal is provided. The oscillator circuit includes an oscillator that generates the oscillation signal based on positive feedback of a signal, a synchronization signal generating section that generates a compulsor... | 07/01/2008 |
| 7391275 | Circuits and methods for a ring oscillator with adjustable delay and/or resonator tank stage Circuits and methods for generating an oscillator output. The circuit generally includes a ring oscillator, with a series of inverters connected in series and an LC resonator tank (or a variable resistance) coupled to the input and output of the inverter series. The... | 06/24/2008 |
| 7375598 | 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 ... | 05/20/2008 |
| 7375597 | Low-noise fine-frequency tuning Circuits, methods, apparatus, and code that provide low-noise and high-resolution electronic circuit tuning. An exemplary embodiment of the present invention adjusts a capacitance value by pulse-width modulating a control voltage for a switch in series with a capaci... | 05/20/2008 |
| 7372342 | Oscillator A high-performance crystal oscillator providing effective bias resistors with low power consumption and minimal substrate surface area. In various embodiments of the invention, a switched-capacitor resistor is operably coupled to circuit components, such as an oscil... | 05/13/2008 |
| 7372337 | Voltage controlled oscillator comprising an injection pulling compensation circuit The present invention relates to a method for stabilising the operation of a voltage controlled oscillator driven by a phase locked loop, the voltage controlled oscillator delivering an RF signal and receiving through at least one spurious path a harmonic component ... | 05/13/2008 |
| 7372343 | Oscillator circuit The invention is directed to an oscillator circuit in which a frequency-determining resonant circuit includes an inductive element, a first capacitive element and at least one second capacitive element which is connected in series with the first capacitive element. ... | 05/13/2008 |
| 7369009 | Oscillator device for frequency modulation The present invention pertains to an oscillator arrangement for carrying out a frequency modulation process, wherein an oscillator (1) with automatic amplitude control (5, 6, 7) is provided. The shift keying is not realized with reconnectable capacitan... | 05/06/2008 |
