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Class Information
Number: 331/175
Name: Oscillators > Frequency stabilization
Description: Subject matter wherein means are provided in the oscillator circuit to prevent or compensate for undesirable drift or change in oscillator frequency caused by changes in oscillator frequency such as by changes in (1) space discharge device characteristics, (2) circuit parameters, or (3) supply or bias voltages, or any combination of (1), (2) or (3).
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7609117 |
Phase-locked loop circuit with current-pulse injection for improving linearity |
Oct. 27, 2009 |
| 7602255 |
Loop circuits that reduce bandwidth variations |
Oct. 13, 2009 |
| 7602259 |
Voltage-controlled oscillator |
Oct. 13, 2009 |
| 7570125 |
Crystal oscillator |
Aug. 4, 2009 |
| 7561001 |
Electronic oscillator circuit device |
Jul. 14, 2009 |
| 7557669 |
Voltage controlled oscillator and its control method |
Jul. 7, 2009 |
| 7548122 |
PLL with switched parameters |
Jun. 16, 2009 |
| 7545228 |
Dynamic temperature compensation for a digitally controlled oscillator using dual MEMS resonators |
Jun. 9, 2009 |
| 7532079 |
Digital tuning of crystal oscillators |
May. 12, 2009 |
| 7528670 |
Sine wave oscillator having a self-startup circuit |
May. 5, 2009 |
| 7522009 |
Oscillation stabilization circuit |
Apr. 21, 2009 |
| 7502602 |
Method and apparatus to compensate loop error of phase locked loop |
Mar. 10, 2009 |
| 7498893 |
Circuit for generating a high-frequency oscillation in a specified frequency band |
Mar. 3, 2009 |
| 7498885 |
Voltage controlled oscillator with gain compensation |
Mar. 3, 2009 |
| 7498891 |
Method for calibration of an oscillator for a microcontroller chip operation |
Mar. 3, 2009 |
| 7492228 |
Voltage controlled oscillator having improved phase noise |
Feb. 17, 2009 |
| 7489206 |
High-frequency power device and method for controlling high-frequency power |
Feb. 10, 2009 |
| 7486151 |
Semiconductor circuit for use in timer circuit or oscillator circuit |
Feb. 3, 2009 |
| 7474163 |
System and method for oscillator noise cancellation |
Jan. 6, 2009 |
| 7474162 |
RC-oscillator circuit |
Jan. 6, 2009 |
| 7456700 |
Variable loop gain oscillator system |
Nov. 25, 2008 |
| 7449968 |
Frequency and temperature compensation synthesis for a MEMS resonator |
Nov. 11, 2008 |
| 7449969 |
Printed circuit board |
Nov. 11, 2008 |
| 7408416 |
Phase locked loop, signal generating apparatus and synchronization method |
Aug. 5, 2008 |
| 7405632 |
Voltage-controlled oscillator, transmitter, and receiver |
Jul. 29, 2008 |
| 7398163 |
Sensing apparatus |
Jul. 8, 2008 |
| 7394324 |
Method and system to calibrate an oscillator within an RFID circuit utilizing a test signal supplied to the RFID circuit |
Jul. 1, 2008 |
| 7391273 |
Clock signal output apparatus and control method of same, and electric apparatus and control method of same |
Jun. 24, 2008 |
| 7391276 |
Oscillation apparatus capable of compensating for fluctuation of oscillation frequency |
Jun. 24, 2008 |
| 7372341 |
Noise immunity circuitry for phase locked loops and delay locked loops |
May. 13, 2008 |
| 7369000 |
Adaptive frequency detector of phase locked loop |
May. 6, 2008 |
| 7352256 |
Crystal oscillation circuit |
Apr. 1, 2008 |
| 7342460 |
Expanded pull range for a voltage controlled clock synthesizer |
Mar. 11, 2008 |
| 7342461 |
Feedback circuit for minimizing VCO sensitivity |
Mar. 11, 2008 |
| 7327201 |
Semiconductor integrated circuit device and wireless communication device |
Feb. 5, 2008 |
| 7327197 |
Radiation hardened phase locked loop |
Feb. 5, 2008 |
| 7323942 |
Dual loop PLL, and multiplication clock generator using dual loop PLL |
Jan. 29, 2008 |
| 7321270 |
Current-controlled CMOS ring oscillator circuit |
Jan. 22, 2008 |
| 7298226 |
Noise tolerant voltage controlled oscillator |
Nov. 20, 2007 |
| 7292114 |
Low-noise high-stability crystal oscillator |
Nov. 6, 2007 |
| 7292117 |
Temperature-compensated piezoelectric oscillator |
Nov. 6, 2007 |
| 7271675 |
Automatic gain control circuit and method and super-regenerative RF receiver |
Sep. 18, 2007 |
| 7268631 |
Phase locked loop with scaled damping capacitor |
Sep. 11, 2007 |
| 7265641 |
Oscillator circuit arrangement with an automation feedback control |
Sep. 4, 2007 |
| 7262671 |
Amplitude level control circuit |
Aug. 28, 2007 |
| 7262670 |
Low thermal drift, tunable frequency voltage controlled oscillator |
Aug. 28, 2007 |
| 7253767 |
Flat model software compensated crystal oscillator for GPS receiver |
Aug. 7, 2007 |
| 7250825 |
Method and apparatus for calibration of a low frequency oscillator in a processor based system |
Jul. 31, 2007 |
| 7250826 |
Mutual inductance in transformer based tank circuitry |
Jul. 31, 2007 |
| 7248128 |
Reference oscillator frequency stabilization |
Jul. 24, 2007 |
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