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Class Information
Number: 331/14
Name: Oscillators > Automatic frequency stabilization using a phase or frequency sensing means > With intermittent comparison controls
Description: Subject matter wherein means are provided to open and close the A.F.S. loop of the oscillator periodically. By way of example, a periodically actuated switch may connect the input of the comparator in the A.F.S. loop of an oscillator alternately to the oscillator output and the reference oscillator output.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7439813 |
Method and system for generating carrier frequencies for UWB application |
Oct. 21, 2008 |
| 7436263 |
Apparatus and method for presenting a modulated output signal at an output locus |
Oct. 14, 2008 |
| 7420427 |
Phase-locked loop with a digital calibration loop and an analog calibration loop |
Sep. 2, 2008 |
| 7408415 |
Voltage controlled oscillator phase locked loop circuit with loop filter capacitance tuning |
Aug. 5, 2008 |
| 7391273 |
Clock signal output apparatus and control method of same, and electric apparatus and control method of same |
Jun. 24, 2008 |
| 7388437 |
System and method for tuning a frequency synthesizer |
Jun. 17, 2008 |
| 7382201 |
Signal generating apparatus and method thereof |
Jun. 3, 2008 |
| 7362826 |
Receiver including an oscillation circuit for generating an image rejection calibration tone |
Apr. 22, 2008 |
| 7323944 |
PLL lock management system |
Jan. 29, 2008 |
| 7315214 |
Phase locked loop |
Jan. 1, 2008 |
| 7301414 |
PLL circuit, radio-communication equipment and method of oscillation frequency control |
Nov. 27, 2007 |
| 7301416 |
Semiconductor integrated circuit for wireless communication |
Nov. 27, 2007 |
| 7288997 |
Phase lock loop and the control method thereof |
Oct. 30, 2007 |
| 7215207 |
Phase and frequency detection circuits for data communication systems |
May. 8, 2007 |
| 7205853 |
Method to configure phase-locked loop dividing ratio |
Apr. 17, 2007 |
| 7203149 |
PLL circuit and data read-out circuit |
Apr. 10, 2007 |
| 7199673 |
Precharge circuit |
Apr. 3, 2007 |
| 7183860 |
Gain calibration of a digital controlled oscillator |
Feb. 27, 2007 |
| 7183863 |
Self-initializing frequency detector |
Feb. 27, 2007 |
| 7173494 |
Method and system for operating a feedback system for a voltage controlled oscillator that involves correcting for offset related to the feedback system |
Feb. 6, 2007 |
| 7095287 |
Method and apparatus to achieve a process, temperature and divider modulus independent PLL loop bandwidth and damping factor using open-loop calibration techniques |
Aug. 22, 2006 |
| 7081798 |
Variable frequency synthesizer comprising a sigma-delta modulator |
Jul. 25, 2006 |
| 7064621 |
Synchronous clock generation circuit capable of ensuring wide lock-in range and attaining lower jitter |
Jun. 20, 2006 |
| 7058528 |
Automated optimization of asymmetric waveform generator LC tuning electronics |
Jun. 6, 2006 |
| 7031675 |
FM transmitter |
Apr. 18, 2006 |
| 7012472 |
Digital control loop to improve phase noise performance and RX/TX linearity |
Mar. 14, 2006 |
| 6998922 |
Phase locked loop modulator calibration techniques |
Feb. 14, 2006 |
| 6999020 |
Semiconductor integrated circuit |
Feb. 14, 2006 |
| 6975176 |
Self-tuning varactor system |
Dec. 13, 2005 |
| 6972631 |
Rubidium frequency standard control method and system for voltage-controlled oscillators |
Dec. 6, 2005 |
| 6949980 |
Phase-locked loop with high frequency adjustment of the operating range of the oscillator |
Sep. 27, 2005 |
| 6922047 |
Startup/yank circuit for self-biased phase-locked loops |
Jul. 26, 2005 |
| 6885252 |
Clock recovery circuit capable of automatically adjusting frequency range of a VCO |
Apr. 26, 2005 |
| 6822519 |
Synthesizer structures and alignment methods that facilitate quadrature demodulation |
Nov. 23, 2004 |
| 6806782 |
Frequency synthesizer circuit |
Oct. 19, 2004 |
| 6795517 |
Low power phase locked loop frequency synthesizer |
Sep. 21, 2004 |
| 6791421 |
Input-switching voltage-controlled oscillator and PLL-controlled oscillator |
Sep. 14, 2004 |
| 6778022 |
VCO with high-Q switching capacitor bank |
Aug. 17, 2004 |
| 6774732 |
System and method for coarse tuning a phase locked loop (PLL) synthesizer using 2-PI slip detection |
Aug. 10, 2004 |
| 6734738 |
Low power timer circuit having stable output frequency |
May. 11, 2004 |
| 6734740 |
Enhanced ZDB feedback methodology utilizing binary weighted techniques |
May. 11, 2004 |
| 6707342 |
Multiple-VCO tuning |
Mar. 16, 2004 |
| 6677824 |
Changing the output frequency of a phase-locked loop |
Jan. 13, 2004 |
| 6664828 |
Post-silicon control of phase locked loop charge pump current |
Dec. 16, 2003 |
| 6636120 |
Decimated digital phase-locked loop for high-speed implementation |
Oct. 21, 2003 |
| 6621354 |
Feedback methods and systems for rapid switching of oscillator frequencies |
Sep. 16, 2003 |
| 6614315 |
Tuning circuit for a YIG oscillator |
Sep. 2, 2003 |
| 6614319 |
Phase-locked loop circuit of fractional frequency-dividing type |
Sep. 2, 2003 |
| 6608530 |
Enhanced ZDB feedback methodology utilizing binary weighted techniques |
Aug. 19, 2003 |
| 6597250 |
Low-noise and rapid response frequency synthesizer, and corresponding frequency synthesizing method |
Jul. 22, 2003 |
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