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Class Information
Number: 331/17
Name: Oscillators > Automatic frequency stabilization using a phase or frequency sensing means > Particular error voltage control (e.g., intergrating network)
Description: Subject matter wherein the A.F.S. loop of the oscillator is provided with means to modify or control the error voltage so as to compensate or correct for undesired changes in the error voltage brought about by some deficiency in the oscillator system, such as a drift in reference frequency, hunting due to instability around the A.F.S. loop, undesired shift in phase of side band frequencies, and so forth.


Patents under this class:

Patent Number Title Of Patent Date Issued
7616071 PLL circuit and semiconductor device provided with PLL circuit Nov. 10, 2009
7616069 Method and system for fast PLL close-loop settling after open-loop VCO calibration Nov. 10, 2009
7616068 Frequency synthesizer for integrated circuit radios Nov. 10, 2009
7616067 Phase synchronization circuit and electronic apparatus Nov. 10, 2009
7613267 Digitally-synthesized loop filter method and circuit particularly useful for a phase locked loop Nov. 3, 2009
7612618 PLL apparatus for OFDM system having variable channel bands and operating method thereof Nov. 3, 2009
7612617 Voltage-controlled oscillator gain calibration for two-point modulation in a phase-locked loop Nov. 3, 2009
7612590 Oscillating apparatus Nov. 3, 2009
7609756 Rotary clock flash analog to digital converter system and method Oct. 27, 2009
7609118 Phase-locked loop calibration system Oct. 27, 2009
7609117 Phase-locked loop circuit with current-pulse injection for improving linearity Oct. 27, 2009
7609108 Phase-locked loop and compound MOS capacitor thereof Oct. 27, 2009
7605667 Frequency synthesizer with a harmonic locked phase/frequency detector Oct. 20, 2009
7605664 All digital phase locked loop system and method Oct. 20, 2009
7605663 Method and apparatus for stabilizing output frequency of PLL (phase lock loop) and phase lock loop thereof Oct. 20, 2009
7602259 Voltage-controlled oscillator Oct. 13, 2009
7599418 Method and apparatus for a frequency hopper Oct. 6, 2009
7598816 Phase lock loop circuit with delaying phase frequency comparson output signals Oct. 6, 2009
7595699 Look loop circuit and method having improved lock time Sep. 29, 2009
7595698 PLL lock time reduction Sep. 29, 2009
7586379 Voltage controlled oscillator with operation current adjusting device Sep. 8, 2009
7586378 Method and system for using a frequency locked loop logen in oscillator systems Sep. 8, 2009
7583773 Frequency synthesizing device with automatic calibration Sep. 1, 2009
7583152 Phase-locked loop with self-correcting phase-to-digital transfer function Sep. 1, 2009
7580498 Closed loop control system and method of dynamically changing the loop bandwidth Aug. 25, 2009
7580443 Clock generating method and clock generating circuit Aug. 25, 2009
7573348 Arrangement and method for determining a gradient factor for a digitally controlled oscillator, and phase locked loop Aug. 11, 2009
7570123 Digitally controlled analog frequency synthesizer Aug. 4, 2009
7567643 Phase lock loop device Jul. 28, 2009
7567133 Phase-locked loop filter capacitance with a drag current Jul. 28, 2009
7567132 Synthesizer Jul. 28, 2009
7557671 Real time VCO gain non linearity calibration Jul. 7, 2009
7557663 Digital PLL for a system-on-chip for digital control of electronic power devices Jul. 7, 2009
7554413 Voltage controlled oscillator with compensation for power supply variation in phase-locked loop Jun. 30, 2009
7551039 Phase adjustment in phase-locked loops using multiple oscillator signals Jun. 23, 2009
7551037 PLL circuit having reduced pull-in time Jun. 23, 2009
7548123 Dividerless PLL architecture Jun. 16, 2009
7548122 PLL with switched parameters Jun. 16, 2009
7545937 Chrominance processing arrangement having immunity to colorstripe encoding Jun. 9, 2009
7545223 PLL circuit Jun. 9, 2009
7545222 Phase lock loop for rapid lock-in and method therefor Jun. 9, 2009
7541881 Power supply noise insensitive charge pump, loop filter, VCO control, and VCO Jun. 2, 2009
7541879 System for compensation of VCO non-linearity Jun. 2, 2009
7541877 Auto-adjusting high accuracy oscillator Jun. 2, 2009
7538623 Phase locked loop modulator calibration techniques May. 26, 2009
7538620 Phase lock control system for a voltage controlled oscillator May. 26, 2009
7536164 Controlling the frequency of an oscillator May. 19, 2009
7535272 Zero-delay buffer with common-mode equalizer for input and feedback differential clocks into a phase-locked loop (PLL) May. 19, 2009
7528666 Apparatus and method for phase lock loop gain control using unit current sources May. 5, 2009
7522005 K.sub.FM frequency tracking system using an analog correlator Apr. 21, 2009



 
 
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