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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...
8169270 Overlapping, two-segment capacitor bank for VCO frequency tuning  
A VCO (for example, in an FM receiver) includes an LC resonant tank. The LC resonant tank includes a coarse tuning capacitor bank and a fine tuning capacitor bank. The coarse tuning capacitor bank...
8169050 BEOL wiring structures that include an on-chip inductor and an on-chip capacitor, and design structures for a radiofrequency integrated circuit  
Back-end-of-line (BEOL) wiring structures that include an on-chip inductor and an on-chip capacitor, as well as design structures for a radiofrequency integrated circuit. The on-chip inductor and...
8169271 Interference resistant local oscillator  
With some embodiments, a VCO (voltage controlled oscillator) operates at an integer multiple (N) above a desired transmission frequency. In accordance with one embodiment, a chip is provided with a...
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...
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...
8154350 PLL with continuous and bang-bang feedback controls  
An apparatus is provided. The apparatus comprising a voltage controlled oscillator (VCO), an amplifier, a switch, a calibration capacitor, and a control loop. The VCO includes a capacitive network...
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...
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...
8143962 Tuning circuit with a wide tuning range  
Tuning circuits with a wide tuning range and a method of tuning an integrated circuit (IC) are disclosed. An embodiment of the disclosed circuits includes varactor banks coupled in series. Each of...
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...
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...
8134417 Automatic amplitude control for voltage controlled oscillator  
A circuit and method for calibrating a VCO (voltage controlled oscillator) is disclosed. In one embodiment, a circuit includes a VCO and a bias control circuit coupled to a tail node of the VCO. An...
8134421 Voltage control oscillator and quadrature modulator  
A voltage control oscillator includes: first and second field effect transistors, a drain of one of which is connected to a gate of the other and a drain of the other of which is connected to a...
8134414 Clock, frequency reference, and other reference signal generator with frequency stability over temperature variation  
Exemplary embodiments provide a reference signal generator having a reference or center frequency within a predetermined variance over variations in temperature within a specified range. An...
8134413 Low-power oscillator  
Techniques for synthesizing a signal having a desired frequency from an oscillation signal. In an aspect, a reference signal having a known frequency may be periodically used to determine a ratio...
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...
8130051 Method and system for varactor linearization  
Aspects of a method and system for varactor linearization are provided. In this regard, a relationship between control voltage and capacitance of a variable capacitor may be controlled utilizing a...
8120440 Voltage controlled oscillator (VCO) with simultaneous switching of frequency band, oscillation core and varactor size  
The invention relates to a voltage controlled oscillator for generating a variable frequency. The oscillator comprises an oscillator core and a transconductive portion for compensating current...
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...
8106719 Voltage-controlled oscillator, phase-locked loop circuit and clock data recovery circuit  
A voltage-controlled oscillator is provided with inductor 7a arranged between a power supply and a ground; and a variable capacitive section 56 that configures a resonator circuit with inductor 7a....
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...
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...
8093957 Method and apparatus for frequency compensation for multi-band VCO  
A method and apparatus for frequency compensation for multi-band VCO have been disclosed where a VCO tank loading capacitance is adjusted slowly to allow VCO operation in a linear range.
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...
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...
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...
8085087 Switched capacitor circuit capable of minimizing clock feedthrough effect and having low phase noise and method thereof  
A switched capacitor circuit includes a positive side capacitor coupled to a first positive side node; a first positive side switch element for selectively coupling the first positive side node to...
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...
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...
8076985 PLL/FLL with voltage controlled oscillator  
Provided is a voltage-controlled oscillator that can hold an oscillation frequency at a desired value when an oscillation frequency changes due to the temperature, without narrowing a variable...
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...
8067987 Millimeter-wave wideband voltage controlled oscillator  
A voltage controlled oscillator-phase lock loop (VCO-PLL) system includes a voltage controlled oscillator (VCO) system implementing four-channel architecture, such that two bands support two...
8067995 Voltage controlled oscillator, and PLL circuit and wireless communication device each using the same  
A voltage controlled oscillator includes first and second variable capacitance circuits 120 and 130, and first and second capacitance switch circuits 140 and 150. A control voltage Vt is fixedly...
8063712 Method and system for voltage controlled oscillator impedance control to optimize performance, efficiency, and power consumption  
Methods and systems for VCO impedance control to optimize performance, efficiency, and power consumption are disclosed and may include selectively coupling one of a plurality of taps on a multi-tap...
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...
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...
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...
8044741 Systems and methods for reducing flicker noise in an oscillator  
Various systems and methods for implementing dynamic logic are disclosed herein. For example, some embodiments of the present invention provide LC tank circuits having an inductance and a...
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...
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...
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...
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...
8031016 Multiplying oscillator and wireless apparatus in which the same is installed  
An object of the invention is to provide a multiplying oscillator capable of generating a high frequency signal by small circuit scale and power consumption in an oscillator for generating a signal...
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...
8022776 Origami cascaded topology for analog and mixed-signal applications  
The present disclosure relates to coupled circuits and methods of coupling circuits having a power supply wherein a plurality of transistors are inductively coupled directly to the power supply for...
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...
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...
8008981 Multi-phase ultra-wideband signal generator using differential pulse oscillators and array thereof  
A multi-phase ultra-wideband signal generator uses differential pulse oscillators. The multi-phase ultra-wideband signal generator using differential pulse oscillators includes N pulse oscillators...
7990227 Phased-locked loop (PLL) synthesizer-synthesizer with improved voltage-controlled oscillator (VCO) pre-tuning  
An apparatus for providing Phased-Locked Loop (PLL) synthesis comprises a phase detector, at least one switchable filter, an oscillator controlled by a control voltage (uPLL) and a divider. The...
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