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8183937 Integrated circuit frequency generator  
An integrated circuit frequency generator is disclosed. In some embodiments, the frequency generator comprises an electronic oscillator configured to generate an oscillator frequency and...
8166322 Portable terminal device  
A portable terminal device includes a supplying unit for supplying, to a CPR, an operating frequency of a clock signal used to operate the CPU, a setting unit for setting one clock level out of a...
8164390 Regulating an operating condition of an integrated circuit to compensate for a manufacturing variation  
An integrated circuit has operational circuitry to perform an operation. An operational regulator regulates an operating condition of the operational circuitry. The operational regulator has a...
8154782 Method and system for generating a drive signal for a MEMS scanner  
A method for generating a drive signal for a micro-electro-mechanical system (MEMS) scanner is provided. The method includes generating the drive signal for the MEMS scanner using a direct digital...
8138842 PLL frequency synthesizer  
A frequency synthesizer includes a voltage-controlled oscillator, a frequency range tuning circuit which detects a frequency control code that sets a voltage-controlled frequency range of the...
8125253 System and method for dynamically switching between low and high frequency reference clock to PLL and minimizing PLL output frequency changes  
A circuit is provided for use with a clock having an input divider portion, a feedback divider portion, a phase detector portion, a loop compensation filter portion and a voltage controlled...
8120394 Automatic frequency calibration circuit and automatic frequency calibration method  
An automatic frequency calibration circuit and an automatic frequency calibration method for a fractional-N frequency synthesizer are provided. In a calibration mode, a state machine adjusts a...
8102158 Phase synchronization circuit  
A phase synchronization circuit comprising: a charging/discharging-circuit to charge/discharge a capacitor in accordance with a drive-signal, charging and/or discharging current-values of the...
8076979 Lock detection circuit for phase locked loop  
A lock detector circuit for detecting a lock condition between a reference signal and a feedback signal includes a first counter for outputting a first counter value indicative of a number of clock...
8076978 Circuit with noise shaper  
In an embodiment, a circuit comprising an oscillator is provided. The oscillator is controlled based on a feedback value and an input reference value. The feedback value or the reference value or...
8065553 Phase interpolator for a timing signal generating circuit  
A semiconductor integrated circuit device has a command decoder for issuing a control command in accordance with a supplied control signal, a DRAM core, and a timing adjusting circuit for supplying...
8058915 Digital phase-locked loop and digital phase-frequency detector thereof  
A digital phase-locked loop and a digital phase-frequency detector thereof are provided. The digital PFD includes a divisor switch unit, a low-resolution phase-error detecting unit, an accumulating...
8049568 Feedback-based linearization of voltage controlled oscillator  
Embodiments of the present invention enable a feedback-based VCO linearization technique. Embodiments include a frequency locked loop formed by feeding back a VCO's output into the VCO's input in...
8026769 Frequency-locked clock generator  
A frequency-locked clock generator includes a voltage-controlled oscillator (VCO), a frequency-to-current converter, a reference current source and a gain stage. The VCO generates an output signal....
8022775 Systems and methods for maintaining a drive signal to a resonant circuit at a resonant frequency  
Systems and methods for maintaining a drive signal to a resonant circuit at a resonant frequency are provided. A system for maintaining a drive signal to a resonant circuit at a resonant frequency...
8008978 Oscillator circuit and memory system  
An oscillator circuit generates a constant delay time by use of a current source and a load element to determine a frequency of a clock. The oscillator circuit includes an integrator which...
8004324 Phase-locked loop frequency synthesizer of fractional N-type, and phase shift circuit with frequency converting function  
Provided is a phase-locked loop frequency synthesizer, including: a reference oscillator; a voltage controlled oscillator; a variable frequency divider that divides the high frequency signal in...
7999622 Adaptive phase noise cancellation for fractional-N phase locked loop  
An embodiment of the invention is a circuit for adaptive phase noise cancellation for a fractional-N PLL. A preferred embodiment employs a split loop filter architecture. Two loop filter halves...
7990224 Dual reference phase tracking phase-locked loop  
A phase-locked loop circuit having a dual-reference input and a phase detector. The dual-reference input is configured to accept both a rising edge of an input clock having a first phase and a...
7982552 Automatic frequency calibration apparatus and method for a phase-locked loop based frequency synthesizer  
An automatic frequency calibration apparatus and a method thereof for a phase-locked loop based frequency synthesizer are disclosed. The apparatus includes a frequency-to-digital converter...
7978111 High resolution time-to-digital converter  
A time-to-digital converter (TDC) can have a resolution that is finer than the propagation delay of an inverter. In one example, a fractional-delay element circuit receives a TDC input signal and...
7978017 Control voltage generator for a clock, frequency reference, and other reference signal generator  
Exemplary embodiments of the invention provide a reference signal generator, system and method. An exemplary apparatus to generate a harmonic reference signal includes a reference resonator, such...
7956695 High-frequency low-gain ring VCO for clock-data recovery in high-speed serial interface of a programmable logic device  
A voltage-controlled oscillator operates at high frequency without high gain by dividing the frequency range into a plurality of subranges, which preferably are substantially equal in size. Within...
7920663 Using the AC mains as a reference for frequency comparison  
Adjusting a local frequency source is disclosed. A local frequency comparison data is compared with a received frequency comparison data, wherein the local frequency comparison data reflects a...
7911248 Apparatus for linearization of digitally controlled oscillator  
There is provided an apparatus for the linearization of a digitally controlled oscillator. The apparatus includes a first filter outputting only a low frequency band signal of an input signal to...
7911284 Voltage controlled oscillator  
A voltage controlled oscillator circuit comprises a variable current generator to supply an operation current to a voltage controlled oscillator, the voltage controlled oscillator to include a...
7907021 Two-step VCO calibration method  
The present invention discloses a two-step VCO calibration method. The two-step VCO calibration method, comprising power-on calibration, used to provide a coarse VCO tuning; real-time calibration,...
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...
7884676 PLL/FLL circuit with gain control  
An FLL circuit having a capability of configuring a desired loop bandwidth in a short period of time is provided. An FDC 17 generates a feedback of an output signal of a VCO 15. An error detector...
7825781 Tire pressure monitoring system  
A tire pressure monitoring system is capable of ensuring accuracy of the rate of transmission of data via wireless communications without an increase in the number of oscillators and an increase in...
7827430 Integrated circuit with interpolation to avoid harmonic interference  
An integrated circuit (IC) includes a clock circuit, a processing module, and processing circuitry. The clock circuit is coupled to produce a digital clock signal. The processing module is coupled...
7800454 Digital controlled oscillator  
A digital controlled oscillator including a programmable current source, a first variable capacitor and a second variable capacitor. A comparator compares the voltage across the variable capacitors...
7793132 Integrated circuit having frequency dependent noise avoidance  
An integrated circuit includes first, second and third circuits, a clock module and a rate adapting module. The first circuit causes frequency dependent noise and is clocked based on a clock...
7728678 Semiconductor device outputting oscillation signal  
A semiconductor device includes a voltage control and oscillation circuit oscillating at a frequency according to a first control voltage to output an oscillation signal, a frequency/voltage...
7719331 PLL circuit  
Disclosed is a PLL circuit including a phase frequency detector (PFD) for comparing phase and frequency between an input signal and an output signal, a charge pump circuit for charging a capacitor...
7715515 Method and apparatus for reducing non-montonic regions in a digitally controlled oscillator  
The control word input to a Digitally Controlled Oscillator (DCO) is modified to reduce non-monotonic regions in the output response of the DCO. The DCO may be included in a Phase-Locked Loop (PLL)...
RE41235 Phase locked loop circuit  
A PLL circuit comprises a frequency comparator for detecting a phase difference based on a difference in frequencies between a reproduced data pulse and a clock generated by a VCO; a phase...
7671690 Method and signal control system providing fast transitions in an oscillating signal  
In one embodiment, a signal control system has a signal output and includes: 1) a phase-locked loop (PLL) having a voltage-controlled oscillator (VCO), a phase error detector, an oscillating output...
7656236 Noise canceling technique for frequency synthesizer  
A frequency synthesizer is disclosed. According to one embodiment, the frequency synthesizer includes an input terminal and an output terminal, a loop filter, a digital phase detector, and an...
7649420 Frequency detecting and converting apparatus  
A frequency detecting and converting apparatus comprises a plurality of frequency-dividers, a multiplexer, a pulse width detector, a comparing unit and an encoder. The invention automatically...
7646253 Frequency-locked clock generator  
A frequency-locked clock generator includes a voltage-controlled oscillator (VCO), a frequency-to-current converter, a reference current source and a gain stage. The VCO generates an output signal....
7642824 PLL circuit and method of controlling the same  
A PLL circuit includes a phase detector that compares the phase of an input clock with the phase of a feedback clock so as to generate pull-up and pull-down control signals. A low pass filter pumps...
7633235 Inductively-powered power transfer system with one or more independently controllable loads  
The present invention provides a system for controlling one or more operating unites in an inductive power transfer (IPT) system. Each operating unit includes a pick-up coil that takes power from a...
7576622 Method of generating an output of a frequency synthesizer  
A method of generating an output of a frequency synthesizer is disclosed. The method comprises the steps of generating an output of the frequency synthesizer based upon frequency synthesizer values...
7573348 Arrangement and method for determining a gradient factor for a digitally controlled oscillator, and phase locked loop  
An arrangement for determining a gradient factor for a digitally controlled oscillator has a data alignment device and an identification device. The data alignment device can be supplied a...
7567883 Method and apparatus for synchronizing signals in a testing system  
The preferred embodiments of the present invention provide approaches for synchronizing signals in a testing system. In some embodiments, the timing signal associated with each device under test...
7538619 Oscillator reducing clock signal variations due to variations in voltage or temperature  
Provided is an oscillator including a logic signal generator and a clock generator. The logic signal generator generates a first logic signal and a second logic signal that have the same period but...
7528664 Method of and apparatus for improving the signal-to-noise ratio for a digital conversion circuit  
The signal-to-noise ratio for a digital conversion circuit is improved by taking a source signal and generating N signals that are each phase-shifted relative to each other, thereby generating N...
7528663 Microwave oscillator tuned with a ferromagnetic thin film  
A microwave tuned oscillator utilizing a ferromagnetic thin film resonator comprises: a) a microwave resonator (1) comprising a ferromagnetic thin film resonance plate (110) such as a disc-shaped...
7498884 Self calibrating RC oscillator  
There is disclosed a self-calibrating resistor-capacitor (RC) oscillator in which a resistor has a resistance value varied minimally by temperature change and process variation, a capacitor has a...
Matches 1 - 50 out of 331 1 2 3 4 5 6 7 >