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8183949 Compensation of VCO gain curve offsets using auto-calibration  
A method is provided for selecting an operating band of a voltage-controlled oscillator (“VCO”) of a phase locked loop (“PLL”) for which the lock frequency is closest to a center of the frequen...
8183950 Auto-calibration for ring oscillator VCO  
A phase locked loop (“PLL”) includes a voltage controlled oscillator (“VCO”) operable to acquire and maintain lock at a selected output frequency of the VCO and control logic operable to perform...
8183934 PLL circuit and voltage-controlled oscillator  
In a PLL circuit, a threshold discriminator generates a control signal indicating a relative level of a control voltage. A controller outputs a controlling value based on the control signal. If the...
8183935 Phased shifted oscilator and antenna  
This invention describes new and improved phased shifted injection oscillator, a phased shifted injection locked push-push oscillator and a phased array antennas (PAA). The PAAs in accordance with...
8183943 Oscillator and phase synchronizing circuit  
When a direct-current voltage is applied from a power supply, a signal line generates a standing wave having the ¾ wavelength where a starting end of the signal line connected to the power supply ...
8179294 Apparatus and method for the calibration of delta-sigma modulators  
The application relates to a calibration apparatus and calibration method for a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type. The calibration apparatus...
8174332 Phase lock loop pre-charging system and method  
A phase lock loop pre-charging system and method are described. In one embodiment, a phase lock loop pre-charge system includes a bias component for generating a pre-charge voltage, and an...
8174326 Phase lock loop control error selection system and method  
In one embodiment, a cross zero best error selection system includes an error input interface, a most significant bit summation component and a multiplexer. The error input interface in coupled to...
8174324 Digital phase detector, and digital phase locked loop including the same  
A digital phase detector includes a quantization unit that quantizes a frequency of a reference signal to generate reference delay information and reference integer phase information, and quantizes...
8174327 Method and system for configuration of a phase-locked loop circuit  
Example embodiments are directed toward configuration of a phase lock loop (PLL) circuits for low power operation. In particular embodiments, a fraction related to a desired gain of a PLL circuit...
8154354 Nonlinear pulse oscillator methods and apparatus  
Methods and apparatus for implementing stable self-starting and self-sustaining high-speed electrical nonlinear pulse (e.g., soliton, cnoidal wave, or quasi-soliton) oscillators. Chip-scale...
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...
8145935 Clock signal generator for generating stable clock signal, semiconductor memory device including the same, and methods of operating  
A clock signal generator can include a clock signal generation unit that is configured to generate a clock signal. A clock signal control unit is configured to count a number of pulses of the clock...
8145139 Simplified radio frequency receiver  
An oscillator is provided that is arranged to function as a simplified receiver. The oscillator has a resonator portion and a non-linear portion, which cooperate to generate an oscillating signal....
8143957 Current-mode gain-splitting dual-path VCO  
Techniques to effectively handle large voltage-controlled oscillator (VCO) gain are described. The techniques utilize (1) a slow high-gain path to provide an average control current that adjusts...
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...
8138841 Apparatus and method for controlling the output phase of a VCO  
A method and apparatus controlling the output phase of a VCO (Voltage Controlled Oscillator). The apparatus has a phase locked loop 20 having a first input 21 for receiving a reference signal and a...
8138840 Optimal dithering of a digitally controlled oscillator with clock dithering for gain and bandwidth control  
A digital phase locked loop (DPLL) and method include an adjustable delay line configured to receive a reference clock as an input and to output a dithered reference clock signal. A phase and...
8134412 Synchronization of a data output signal to an input clock  
A digital apparatus for phase aligning output signals of a silicon device to an applied input clock signal in same device allows synchronization of data transfers between the device and another...
8134411 Computation spreading utilizing dithering for spur reduction in a digital phase lock loop  
A novel and useful apparatus for and method of spur reduction using computation spreading with dithering in a digital phase locked loop (DPLL) architecture. A software based PLL incorporates a...
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...
8134392 Phase locked loop  
A phase locked loop (PLL) which has a desired frequency characteristic even though a manufacturing process of a semiconductor integrated circuit has fluctuations. The semiconductor integrated...
8130046 Frequency calibration of radio frequency oscillators  
A wireless communication device incorporating a set of comparators and logic interrupt into the local oscillator generation circuit block is described. In one design, the local oscillator circuit...
8130047 Open loop coarse tuning for a PLL  
In many types of wireless applications (like wireless modems), it is important that the phase locked loops (PLLs) be able to synthesize clock frequencies in a wide tuning range. Because of the...
8125278 Clock regeneration apparatus and electric equipment  
Disclosed herein is a clock regeneration apparatus, including: an oscillator including n (an integer of two or more) gating groups connected in cascade connection to each other forming an...
8125285 Digitally controlled oscillators  
The problems of large oscillator signal frequency change per bit, small runtime tuning bandwidth, and large wiring layout (and therefore large integrated circuit (IC) layout) in...
8125277 Dual loop frequency synthesizer  
A frequency synthesizer has a fractional N1 loop and an integer N2 loop. The output frequency of the signal of the fractional N1 loop is constrained to values between adjacent harmonics of a...
8121569 Frequency generation techniques  
Techniques involving the generation of signals at particular frequencies are disclosed. For instance, an apparatus may include an oscillator module, a synthesizer module, and a control module. The...
8120431 Variable loop bandwidth phase locked loop  
An apparatus comprising a voltage controlled oscillator, a first charge pump, a second charge pump, a switch circuit and a comparator circuit. The voltage controlled oscillator may be configured to...
8120430 Stable VCO operation in absence of clock signal  
A semiconductor device having a phase-locked loop (“PLL”) (100) drives a VCO (114) of the PLL circuit with a first control voltage (VCTRL) produced by a loop filter (112) when a first clock sig...
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...
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...
8107582 Methods and apparatus for digital clock recovery  
A method and apparatus for clock recovery in synchronous digital systems. The apparatus includes a phase frequency detector, a loop filter, a compressor, and a clock generator. The phase frequency...
8098104 Estimation and compensation of oscillator nonlinearities  
A device may include an oscillator circuit, a control circuit, a frequency detector circuit, and a processor circuit. The oscillator circuit may include a frequency control input to output an...
8099621 Data reception apparatus and microcomputer having the same  
A data reception apparatus includes: an oscillation circuit that multiplies or divides an oscillation signal from a CR oscillator based on a cycle setting value, and outputs a clock signal...
8098109 Differential varactor circuit for a voltage controlled oscillator  
According to one exemplary embodiment, a differential varactor circuit for a voltage controlled oscillator having two differential outputs includes a first varactor having first and second...
8089317 Phase-locked loop circuit, recording-and-reproducing apparatus, and electronic apparatus  
A phase-locked loop circuit includes a phase detection unit, a loop filter unit including a series circuit of a resistor and a capacitor, first and second pulse-current output units which supply...
8090335 Method and apparatus for an adaptive step frequency calibration  
An open loop frequency calibration algorithm is employed whereby frequency counters are utilized to provide frequency information concerning the difference in frequency between a local oscillator...
8085097 Integrated ramp, sweep fractional frequency synthesizer on an integrated circuit chip  
An integrated ramp, sweep fractional frequency synthesizer system on an integrated circuit chip includes an integrated circuit chip having a fractional frequency synthesizer with a fractional...
8085101 Spread spectrum clock generation device  
A spread spectrum controller (20) controls a PLL (10) so that the PLL outputs a spread-spectrum processed clock signal. A loop bandwidth controller (30) controls at least one of a phase detector...
8081936 Method for tuning a digital compensation filter within a transmitter, and associated digital compensation filter and associated calibration circuit  
A method for tuning a digital compensation filter within a transmitter includes: obtaining at least one loop gain calibration result by performing loop gain calibration based upon signals of at...
8076977 Device having digitally controlled oscillator  
A device includes a digitally controlled oscillator and an interpolator having a data input and a data output coupled to the digitally controlled oscillator. The interpolator may be configured to...
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...
8073414 Auto-tuning system for an on-chip RF filter  
A Radio Frequency Receiver on a Single Integrated Circuit (“RFSIC”) is described. The RFSIC may include a mixer, a phase-locked loop (“PLL”) in signal communication with the mixer, and an on-chip...
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...
8067988 Low jitter and wide-range frequency synthesizer for low voltage operation  
A low jitter and wide-range frequency synthesizer for low voltage operation includes a detector to generate a detection signal based on a logic level difference between an input signal and a...
8063707 Phase locked loop  
Phase locked loop circuits capable of increasing an equivalent capacitance thereof to improve stability are provided, in which an integral part comprises a first phase frequency detector providing...
8058932 Digital pulse width modulation device  
A digital pulse width modulation device includes a counter, a first comparator and a second comparator, wherein the first and second comparators are connected in parallel with each other and in...
8058942 Dual reference oscillator phase-lock loop  
A phase-locked loop has a stable high frequency reference oscillator to provide a stable high frequency reference signal that has reference frequency that is a small submultiple of a generated...
8049533 Receiver and method for dynamically adjusting sensitivity of receiver  
A receiver and a method for dynamically adjusting sensitivity of the receiver are provided. The receiver includes a detection unit and a receiving unit. The detection unit detects an input signal...
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