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9041477 Voltage-controlled oscillator  
An apparatus is disclosed that includes a first cross-coupled transistor pair, a second cross-coupled transistor pair, at least one capacitance unit, and an inductive unit. The first cross-coupled...
9035708 Low noise voltage controlled oscillator  
An enhanced negative resistance voltage controlled oscillator (VCO) circuit is provided, in which a parallel connection of a capacitor and a resistor configured to provide frequency-dependent...
9019017 Digitally controlled oscillator and digital PLL including the same  
A digitally controlled oscillator has a high-order ΔΣ modulator configured to be of at least an order higher than a first order and configured to input a digital control signal and output a...
9008601 Single differential-inductor VCO with implicit common-mode resonance  
A circuit for a single differential-inductor oscillator with common-mode resonance may include a tank circuit formed by coupling a first inductor with a pair of first capacitors; a cross-coupled...
9000856 System and method for process and temperature calibration of capacitor-based oscillators  
A method and device for calibrating an oscillator and a temperature sensor in an electronic device are provided. A same temperature cycle, which includes at least two distinct temperatures, may be...
8994463 Push-push oscillator circuit  
A push-push oscillator circuit with a first oscillation branch with a first active device and a first tank adapted to provide a signal having a fundamental frequency f0, a second oscillation...
8994467 Method and apparatus for measuring/compensating mismatches in digitally-controlled oscillator  
A digitally-controlled oscillator (DCO) includes a first capacitor array and a second capacitor array responsive to an integer part and a fractional part of a digital control word, respectively....
8988158 Hybrid voltage controlled oscillator  
A method, an apparatus, and a computer program product are provided. The apparatus provides a VCO signal. The apparatus is a VCO. The apparatus includes a first transconductance circuit. The...
8981862 Cancelling supply noise in a voltage controlled oscillator circuit  
A voltage controlled oscillator (VCO) core for cancelling a supply noise is described. The VCO core includes an input node that receives the supply noise. The VCO core also includes a noise path...
8975977 Low noise and low power voltage controlled oscillators  
LC tank and ring-based VCOs are disclosed that each include a differential pair of transistors for steering a tail current generated by a current source responsive to a bias voltage. A biasing...
8970314 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...
8970315 Low noise oscillator having passive impedance network  
Apparatus and methods are disclosed related to an oscillator that includes a sustaining amplifier. One such apparatus includes a resonant circuit configured to operate at a resonant frequency, a...
8963648 Low noise oscillator having switching network  
Apparatus and methods are also disclosed related to an oscillator that includes a switching network configured to tune a resonant frequency of a resonant circuit. One such apparatus includes a...
8963514 Large signal VCO  
An alternation voltage- or current generator comprises a first switch driving output network whose frequency can be tuned. The tuneable network comprises a first Inductor that is coupled with a...
8957739 Ultra-low voltage-controlled oscillator with trifilar coupling  
The present disclosure relates to a device and method to reduce voltage headroom within a voltage-controlled oscillator by utilizing trifilar coupling or transformer feedback with a capacitive...
8933757 Low phase noise voltage controlled oscillators  
A voltage controlled oscillator (VCO) with low phase noise and a sharp output spectrum is desirable. The present disclosure provides embodiments of LC tank VCOs that generate output signals with...
8912857 PLL system and method for controlling a gain of a VCO circuit  
A phase locked loop system, comprises: a voltage controlled oscillator circuit, comprising a first plurality of switchable varactors for selecting a frequency band of the VCO, that has a gain that...
8912854 Structure for an inductor-capacitor voltage-controlled oscillator  
Embodiments of the present invention provide a design structure and method for compensating for a change in frequency of oscillation (FOO) of an LC-tank VCO that includes a first node; second...
8902009 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...
8896387 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...
8896389 Oscillation circuit having negative resistance element and oscillator using the oscillation circuit  
The present disclosure relates to an oscillation circuit including a differential negative resistance element, a resonance circuit connected to the differential negative resistance element, and a...
8896390 Circuit of inductance/capacitance (LC) voltage-control oscillator  
A circuit of inductance/capacitance (LC) voltage control oscillator (VCO) includes an LC VCO unit, a peak detector and a processing unit. The LC VCO unit receives a current control signal and...
8884713 Method and apparatus of cancelling inductor coupling  
This invention compensates for the unintentional magnetic coupling between a first and second inductor of two different closely spaced inductors separated by a conversion circuit. A cancellation...
8884708 Digitally controlled oscillator device and high frequency signal processing device  
The present invention provides a digitally controlled oscillator device capable of realizing a reduction in DNL. The digitally controlled oscillator device includes, for example, an amplifier...
8878614 Phase-locked loop  
A PLL circuit includes an oscillator, a detection block, an integral path and a proportional path. The oscillator generates an oscillation signal. The detection block detects a phase difference...
8866558 Integrated standing-wave voltage controlled oscillator with dual-mode coplanar waveguide resonator  
A standing wave oscillator includes a cross-coupled differential transistor pair having a pair of input terminals and a pair of output terminals; and a resonant circuit coupled to the input...
8860516 Piezoelectric oscillator and transmitter  
A piezoelectric oscillator includes: a piezoelectric resonator element having a piezoelectric substrate and an excitation electrode formed on a surface of the piezoelectric substrate; a...
8841975 Digitally controlled oscillator device and high frequency signal processing device  
The present invention provides a digitally controlled oscillator device capable of reducing noise away from an oscillation frequency, and a high frequency signal processing device. Fractional...
8836442 Variable capacitance with delay lock loop  
An integrated circuit includes a delay lock loop (DLL) circuit that generates incremental delay line signals and a delay line output signal based on a received clock signal. A pulse-width...
8830007 Ultra-low noise VCO  
An ultra-low phase noise voltage controlled oscillator uses a single bipolar transistor Colpitts oscillator circuit and a noise-reducing negative feedback path consisting of a capacitor and a...
8823463 Oscillator circuit and method for generating an oscillation  
The invention relates to an oscillator circuit, comprising a clipping element for generating a clipped signal, and a first amplification stage for amplifying and filtering the clipped signal to...
8816787 High frequency oscillator circuit and method to operate same  
A method includes providing an oscillator having a field effect transistor connected with a resonant circuit. The field effect transistor has a gate electrode coupled to a source of gate voltage,...
8810328 Circuit arrangement for inductive energy transfer  
A circuit arrangement for the inductive transfer of energy is disclosed. The circuit arrangement includes an oscillator; and a device for detecting the load of the oscillator and for setting the...
8797108 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...
8779861 Multi-phase voltage controlled oscillator using capacitance degenerated single ended transconductance stage and inductance/capacitance load  
An electrical circuit includes a first transistor having a first source, a first drain, and a first gate, whereby the first transistor receives an input voltage through the first gate. An output...
8779865 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...
8779867 Split varactor array with improved matching and varactor switching scheme  
One embodiment of the present invention relates to a digital controlled oscillator. The oscillator includes an oscillator circuit, a varactor array, and a control circuit. The oscillator circuit...
8773215 Fully decoupled LC-tank based oscillator topology for low phase noise and high oscillation amplitude applications  
There is provided a tank based oscillator. The oscillator includes one or more active devices, one or more passive devices, and a tank circuit decoupled from the active devices using at least one...
8773211 Common mode rejection circuit  
An electrical circuit includes a circuit element and a common mode rejection circuit element. The circuit element is configured to operate at a selected frequency within a variable frequency range...
8766735 Low power voltage controlled oscillator  
An enhanced negative resistance voltage controlled oscillator (VCO) is provided, in which the body of each transistor within a pair of cross-coupled transistors is coupled to the gate of the same...
8754719 Integrated circuit devices using analog dividers  
A divider for use in an integrated circuit chip, such as a clock generator chip, includes a ramp generator circuit configured to generate a ramp signal and a synchronous detector circuit...
8749316 Programmable varactor and methods of operation thereof  
Exemplary embodiments are directed to a programmable varactor device. A varactor device may include an input device configured to receive a tuning voltage and generate a bias voltage at least...
8742862 Current reuse voltage controlled oscillator with improved differential output  
A current reuse voltage controlled oscillator with improved differential output is disclosed. In an exemplary embodiment, an apparatus includes a PMOS transistor and an NMOS transistor coupled...
8742859 Tunable inductor circuit  
A tunable inductor circuit is disclosed. The tunable inductor circuit includes a first inductor. The tunable inductor circuit also includes a second inductor in parallel with the first inductor....
8736393 Variable capacitance integrated electronic circuit module  
A digitally controlled variable capacitance integrated electronic circuit module (100) comprises a set of basic cells in a matrix arrangement. Each basic cell itself comprises a functional block...
8736392 Transformer-based CMOS oscillators  
Techniques for providing transformer-based CMOS oscillators capable of operation with low voltage power supplies. In an exemplary embodiment, an LC tank is provided at the drains of a transistor...
8723609 Voltage-controlled oscillator module and method for generating oscillator signals  
A voltage-controlled oscillator (VCO) module including a first VCO unit, a second VCO unit, and a matching circuit is provided. The first VCO unit includes a first terminal and a second terminal...
8723610 Voltage controlled oscillator  
A bias loop is used to program LC tank common mode voltage to allow operation at two different supply voltages VDD (e.g., 2.5V and 1.2V), and two different tank swings. This also allows lower...
8717109 Temperature invariant circuit and method thereof  
A temperature invariant digitally controlled oscillator is disclosed. The digitally controlled oscillator is configured to generate an output clock with stable frequency. The temperature invariant...
8717113 Oscillator and semiconductor integrated circuit device  
An oscillator and a semiconductor integrated circuit device with an internal oscillator capable of compensating the temperature characteristics even when there is a large parasitic capacitance too...