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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...
8928416 Transceiver, voltage control oscillator thereof and control method thereof  
A transceiver includes a phase lock loop (PLL) and a clock data recovery circuit (CDR). The phase lock loop generates a first level control signal. The clock data recovery circuit, coupled to the...
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...
8816778 Clock frequency adjusting method and circuit  
A method for adjusting an oscillator clock frequency, comprising: providing a first oscillator, applying a first setpoint value to the first oscillator, determining a first oscillator frequency...
8810322 Apparatus and method for frequency generation  
A wideband frequency generator has two or more oscillators for different frequency bands, disposed on the same die within a flip chip package. Coupling between inductors of the two oscillators is...
8797105 Tunable signal source  
The present disclosure provides a tunable signal source having a plurality of oscillator cores having a coupling input, a coupling output, and a power output that is common to each of the...
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...
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...
8723608 Method and arrangement for voltage controlled oscillator device  
Embodiments of the present invention relate to a self injection locked voltage controlled oscillator arrangement, a pair of coupled first and second voltage controlled oscillator devices are...
8704603 Low power wideband LO using tuned injection locked oscillator  
A tunable Injection-Locked Oscillator (ILO) having a wide locking range is used in a Local Oscillator (LO) of a wideband wireless transceiver to generate differential signals. The ILO includes a...
8610511 High-frequency digitally controlled oscillator  
The high-frequency digitally controlled oscillator includes fully digital cells capable of being ported to any CMOS fabrication process. The oscillator has a basic modular architecture comprising...
8564375 Methods and apparatus for self-trim calibration of an oscillator  
In one general aspect, an apparatus can include a reference oscillator counter circuit configured to produce a reference oscillator count value based on a reference oscillator signal, and a target...
8558624 Semiconductor integrated circuit  
A semiconductor integrated circuit capable of reliably detecting oscillation stop of a vibrator-type oscillation circuit and reliably restarting the oscillation circuit when oscillation stop is...
8558625 Frequency tuning and phase shifting techniques using 1-dimensional coupled voltage-controlled-oscillator arrays for active antennas  
A technique for enhancing the frequency tuning range for monolithic RF source generation using fully-integrated coupled Voltage-Controlled-Oscillator (VCO) arrays that contain an odd number of...
8552804 Frequency synthesizers with dynamic calibration intervals  
An apparatus includes an adjustable oscillator circuit configured to generate an output signal having a frequency that varies responsive to a frequency control signal and a frequency reference...
8525599 Method and system for frequency tuning based on characterization of an oscillator  
Aspects of a method and system for frequency tuning based on characterization of an oscillator are provided. A value of a first control word which controls a variable impedance of an oscillator...
8456246 Quadrature voltage-controlled oscillator and method of providing four-phase output signals  
A quadrature VCO includes a first oscillator unit and a second oscillator unit. Each of the first and second oscillator unit is composed of a DC bias source, a complementary cross-coupled pair, an...
8351867 Oscillator, frequency generating circuit and wireless communication system using the oscillator  
The present invention provides an oscillator and a communication system using the oscillator, in particular, an LC oscillator adapted to lessen phase noise deterioration due to harmonic...
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...
8306067 Dual-frequency multiplexer  
The invention discloses a dual frequency multiplexer by which a first and second coaxial harmonic oscillator type band pass filters are disposed in a box. The box includes a base body, a cover...
8160168 Method and system for efficient transmission and reception of RF energy in MIMO systems using polar modulation and direct digital frequency synthesis  
A first oscillating signal may be generated via a first direct digital frequency synthesizer of a communication device. One or more second oscillating signals may be generated via one or more...
8144249 Multi-slicing horizontal synchronization signal generating apparatus and method  
A multi-slicing horizontal synchronization signal generating apparatus and method is provided. The apparatus includes a slicer, a numerically controlled oscillator (NCO), a first phase detector, a...
8143955 Oscillator circuit for radio frequency transceivers  
Oscillator circuit for radio frequency transceivers. An oscillator circuit includes a first oscillator that generates a signal having a first frequency and a second oscillator that generates a...
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...
8130044 Phase-locked loop circuitry with multiple voltage-controlled oscillators  
Configurable phase-locked loop circuitry is provided. The phase-locked loop circuitry may include a buffer having a buffer output and a multiplexer having inputs and an output. The phase-locked...
8125282 Dual-band coupled VCO  
In a dual band capable voltage controlled oscillator VCO circuit comprising two voltage controlled oscillator units VCO1, VCO2, the voltage controlled oscillator units VCO1, VCO2 are synchronized...
8058934 Apparatus and method for frequency generation  
A wideband frequency generator has two or more oscillators for different frequency bands, disposed on the same die within a flip chip package. Coupling between inductors of the two oscillators is...
8000162 Voltage-controlled oscillator, phase-locked loop, and memory device  
A voltage-controlled oscillator comprises a first oscillator and a second oscillator. The first oscillator may generate a plurality of intermediate clock signals at a plurality of first nodes,...
7961056 Low phase noise voltage controlled oscillator  
Embodiments of the present invention include a low phase noise oscillator circuit using a current-reuse technique to reduce power consumption and improve phase noise, where the oscillator circuit...
7952438 Injection locking clock generator and clock synchronization circuit using the same  
An injection locking clock generator can vary the free running frequency of an injection locking oscillator to broaden an operating frequency range of an oscillation signal injected to itself,...
7898344 Phase-locked oscillator and multi-radar system using same  
In a multi-radar system, configured comprising a plurality of radar units which generate and output signals the frequency of which increases and decreases periodically, each radar unit generates...
7868705 High-frequency oscillator and electronic apparatus  
In a high-frequency oscillator, a first resonance circuit and a second resonance circuit are respectively connected to a first amplifier circuit and a second amplifier circuit. A selection circuit...
7812679 Multi-band frequency generation method and apparatus  
A frequency generation unit (FGU) 100 includes a plurality of selectable voltage controlled oscillators (110) whose output frequencies are chosen in relationship with a predetermined intermediate...
7808327 Method and apparatus to provide digitally controlled crystal oscillators  
Methods and systems to provide digitally controlled crystal oscillators are disclosed. One example method includes determining a state of an oscillator system and selecting a first output of a...
7791423 Two-frequency switchover type crystal oscillator  
The present invention relates to a two-frequency switchover type crystal oscillator in which first and second IC chips and first and second crystal resonators are connected to wiring patterns of a...
7782145 Method and system for frequency tuning based on characterization of an oscillator  
Aspects of a method and system for frequency tuning based on characterization of an oscillator are provided. In this regard, a frequency of an oscillator in an integrated circuit may be controlled...
7772933 Multiple band oscillator system  
In one embodiment, a multiple band oscillator system is disclosed which comprises a first oscillator having a first input, a resonating element, a first output, and a second output. In addition,...
7760031 Method for reducing inter modulation distortion products of a combined carrier wave using phase alignment of the carrier components  
A method is provided for reducing inter modulation distortion products using multi-carrier phase alignment of the type where a combined carrier signal is generated from the combined output carried...
7705688 Period signal generator of semiconductor integrated circuit  
A period signal generator comprises a first period signal generating unit for generating a first period signal of which period changes according to a temperature, a second period signal generating...
7612625 Bang-bang architecture  
In one embodiment, the present invention includes an apparatus having a voltage controlled oscillator (VCO) to generate a first clock signal having a frequency controlled by a bias current...
7567135 Power monitoring device and methods thereof  
To determine performance degradation at functional module in a normal power state due to a power control device, voltages are applied to oscillators at a power diagnostic module. A first voltage...
7564316 Variable-frequency oscillator incorporating thin-film bulk acoustic resonators  
Variable-frequency oscillators incorporating thin-film bulk acoustic resonators (FBARs) are described. In one aspect, a variable-frequency oscillator includes a first oscillator circuit and a...
7557662 Oscillator and frequency detector  
In an oscillating apparatus or a frequency detecting apparatus in which a center frequency and a variable frequency range are freely or optionally established with a high stability and a high...
7535981 Clock generation circuit and method thereof  
The present invention generates an output clock signal CLKreq having a frequency freq between the frequency fref/A of a divided clock signal CKL1 and the frequency fref/(A+1) of a divided clock...
7496155 Duty cycle correction of a multi-gigahertz clock signal with crossover point control  
A clock recovery circuit includes a crossover adjustment circuit operable to adjust a crossover point to adjust a corresponding duty cycle. The adjustment circuit comprises a feedback adjustment...
7482888 Fast startup resonant element oscillator  
A startup circuit 200 and method 700 is provided for quickly starting up a resonator based oscillator. Tunable oscillator 201 provides an impetus signal to oscillator 205 through capacitor 202....
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...
7342465 Voltage-controlled oscillator with stable gain over a wide frequency range  
An apparatus and method for providing a stable gain over wide frequency range in a VCO are presented. A VCO uses a waveform generator along with a bias generator having a frequency select input....
7342462 Quadrature LC voltage controlled oscillator with opposed bias and coupling control stages  
A voltage controlled oscillator unit is provided with cross coupled voltage controlled oscillators to generate quadrature phases. One control stage adjusts coupling between the oscillators....
7313369 Communication semiconductor integrated circuit and radio communication system  
A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit...

Matches 1 - 50 out of 149 1 2 3 >