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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 |
| 7449963 |
Apparatus and method for phase lock gain control using unit current sources |
Nov. 11, 2008 |
| 7446615 |
Semiconductor integrated circuit with clock generator |
Nov. 4, 2008 |
| 7444268 |
Method and apparatus for identifying a drift in a quantized signal in a computer system |
Oct. 28, 2008 |
| 7443250 |
Programmable phase-locked loop responsive to a selected bandwidth and a selected reference clock signal frequency to adjust circuit characteristics |
Oct. 28, 2008 |
| 7443249 |
Phase locked loop for stably operating in a matter that is insensitive to variation in process, voltage and temperature and method of operating the same |
Oct. 28, 2008 |
| 7443248 |
Apparatus and method for phase lock loop gain control using unit current sources |
Oct. 28, 2008 |
| 7439812 |
Auto-ranging phase-locked loop |
Oct. 21, 2008 |
| 7436264 |
Charge supply apparatus and method in frequency synthesizer |
Oct. 14, 2008 |
| 7436263 |
Apparatus and method for presenting a modulated output signal at an output locus |
Oct. 14, 2008 |
| 7436227 |
Dual loop architecture useful for a programmable clock source and clock multiplier applications |
Oct. 14, 2008 |
| 7428284 |
Phase detector and method providing rapid locking of delay-lock loops |
Sep. 23, 2008 |
| 7427900 |
Integrated PLL loop filter and charge pump |
Sep. 23, 2008 |
| 7425874 |
All-digital phase-locked loop for a digital pulse-width modulator |
Sep. 16, 2008 |
| 7425852 |
Phase-locked loop |
Sep. 16, 2008 |
| 7420428 |
Low noise phase locked loop with a high precision lock detector |
Sep. 2, 2008 |
| 7420426 |
Frequency modulated output clock from a digital phase locked loop |
Sep. 2, 2008 |
| 7417513 |
System and method for signal filtering in a phase-locked loop system |
Aug. 26, 2008 |
| 7414489 |
Phase controlled oscillator circuit with input signal coupler |
Aug. 19, 2008 |
| 7411463 |
Method, system, apparatus, and program for measuring the damping factor of an Nth order phase locked loop (PLL) |
Aug. 12, 2008 |
| 7408419 |
Sigma-delta fractional-N PLL with reduced frequency error |
Aug. 5, 2008 |
| 7408418 |
Phase locked loop circuit having reduced lock time |
Aug. 5, 2008 |
| 7408417 |
Filter automatic adjustment apparatus, filter automatic adjustment method, and mobile telephone system |
Aug. 5, 2008 |
| 7408415 |
Voltage controlled oscillator phase locked loop circuit with loop filter capacitance tuning |
Aug. 5, 2008 |
| 7405633 |
Methods and apparatus for loop bandwidth control for a phase-locked loop |
Jul. 29, 2008 |
| 7405630 |
Frequency synthesizer with improved spurious performance |
Jul. 29, 2008 |
| 7405627 |
PLL frequency synthesizer |
Jul. 29, 2008 |
| 7403063 |
Apparatus and method for tuning center frequency of a filter |
Jul. 22, 2008 |
| 7400210 |
Voltage controlled oscillator, PLL circuit, pulse modulation signal generating circuit, semiconductor laser modulation device and image forming apparatus |
Jul. 15, 2008 |
| 7398071 |
Loop filter with gear shift for improved fractional-N PLL settling time |
Jul. 8, 2008 |
| 7397313 |
Auto-gain controlled digital phase-locked loop and method thereof |
Jul. 8, 2008 |
| 7397312 |
Spectrum analyzer and method for correcting frequency errors |
Jul. 8, 2008 |
| 7394418 |
Apparatus comprising a sigma-delta modulator and method of generating a quantized signal-delta modulator |
Jul. 1, 2008 |
| 7394323 |
PLL frequency synthesizer |
Jul. 1, 2008 |
| 7391271 |
Adjustment of PLL bandwidth for jitter control using feedback circuitry |
Jun. 24, 2008 |
| 7388440 |
Circuit and method to speed up PLL lock-time and prohibit frequency runaway |
Jun. 17, 2008 |
| 7388439 |
Low pass filter and electronic device |
Jun. 17, 2008 |
| 7386064 |
Communication semiconductor integrated circuit device and a wireless communication system |
Jun. 10, 2008 |
| 7385539 |
All-digital phase locked loop (ADPLL) system |
Jun. 10, 2008 |
| 7382201 |
Signal generating apparatus and method thereof |
Jun. 3, 2008 |
| 7382200 |
Type-II all-digital phase-locked loop (PLL) |
Jun. 3, 2008 |
| 7378918 |
Two-point modulation type phase modulation apparatus, polar modulation transmission apparatus, wireless transmission apparatus and wireless communication apparatus |
May. 27, 2008 |
| 7375595 |
Method and apparatus for calibrating a phase locked loop in open-loop |
May. 20, 2008 |
| 7369002 |
Phase locked loop fast lock method |
May. 6, 2008 |
| 7365609 |
Hybrid stochastic gradient based digitally controlled oscillator gain K.sub.DCO estimation |
Apr. 29, 2008 |
| 7365607 |
Low-power, low-jitter, fractional-N all-digital phase-locked loop (PLL) |
Apr. 29, 2008 |
| 7365581 |
Regulated adaptive-bandwidth PLL/DLL using self-biasing current from a VCO/VCDL |
Apr. 29, 2008 |
| 7362185 |
Analog based, state machine controlled, frequency smooth switching method for frequency timing generators |
Apr. 22, 2008 |
| 7362184 |
Frequency divider monitor of phase lock loop |
Apr. 22, 2008 |
| 7358827 |
Process-insensitive self-biasing phase locked loop circuit and self-biasing method thereof |
Apr. 15, 2008 |
| 7355487 |
Method for reducing phase lock time and jittering and phase lock loop using the same |
Apr. 8, 2008 |
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