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Class Information
Number: 331/23
Name: Oscillators > Automatic frequency stabilization using a phase or frequency sensing means > With reference oscillator or source > Sensing modulation (e.g., frequency modulation controlled oscillator
Description: Subject matter wherein means are provided to frequency modulate the generated oscillations of the controlled oscillator by a low frequency reference source, signals representative of the modulated signal being compared with signals from the low frequency reference source in a signal comparator, the error signal from the output of the comparator being utilized to restore the generated frequency of the oscillator to the desired relationship with the reference frequency.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7443261 |
Phase modulating apparatus, communication device, mobile wireless unit, and phase modulating method |
Oct. 28, 2008 |
| 7436263 |
Apparatus and method for presenting a modulated output signal at an output locus |
Oct. 14, 2008 |
| 7420433 |
Phase lock loop RF modulator system |
Sep. 2, 2008 |
| 7417514 |
Method for modulating phase or frequency in a communication system using clock division |
Aug. 26, 2008 |
| 7411469 |
Circuit arrangement |
Aug. 12, 2008 |
| 7408418 |
Phase locked loop circuit having reduced lock time |
Aug. 5, 2008 |
| 7391270 |
Phase locked loop and method for phase correction of a frequency controllable oscillator |
Jun. 24, 2008 |
| 7382201 |
Signal generating apparatus and method thereof |
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 |
| 7372337 |
Voltage controlled oscillator comprising an injection pulling compensation circuit |
May. 13, 2008 |
| 7358825 |
Variable capacitance circuit arrangement |
Apr. 15, 2008 |
| 7352250 |
Phase locked loop circuits, offset PLL transmitters, radio frequency integrated circuits and mobile phone systems |
Apr. 1, 2008 |
| 7292107 |
Modulation method and apparatus with adjustable divisors of the dividers in phase-locked loop |
Nov. 6, 2007 |
| 7292118 |
Modulator |
Nov. 6, 2007 |
| 7288999 |
Pre-distortion system for a synthesizer having modulation applied in the reference path |
Oct. 30, 2007 |
| 7209016 |
Variable capacitance circuit arrangement |
Apr. 24, 2007 |
| 7205850 |
Communication semiconductor integrated circuit device and a wireless communication system |
Apr. 17, 2007 |
| 7187247 |
Variable capacitance circuit arrangement |
Mar. 6, 2007 |
| 7180385 |
Direct frequency modulation system having an IQ mixer in the phase locked loop |
Feb. 20, 2007 |
| 7173493 |
Range controller circuit and method |
Feb. 6, 2007 |
| 7154347 |
Compensating method for a PLL circuit that functions according to the two-point principle, and PLL circuit provided with a compensating device |
Dec. 26, 2006 |
| 7145398 |
Coarse frequency detector system and method thereof |
Dec. 5, 2006 |
| 7142070 |
Two-point modulator arrangement |
Nov. 28, 2006 |
| 7113047 |
Clock generator and its control method |
Sep. 26, 2006 |
| 7109805 |
Direct modulator for shift keying modulation |
Sep. 19, 2006 |
| 7103127 |
System for controlling the frequency of an oscillator |
Sep. 5, 2006 |
| 7081798 |
Variable frequency synthesizer comprising a sigma-delta modulator |
Jul. 25, 2006 |
| 7075376 |
Frequency synthesizer using digital pre-distortion and method |
Jul. 11, 2006 |
| 6946915 |
Maximally digitized fractional-N frequency synthesizer and modulator with maximal fractional spurs removing |
Sep. 20, 2005 |
| 6879218 |
Frequency modulation corrector keeping a good oscillating signal quality and suppressing dependability of a modulation degree |
Apr. 12, 2005 |
| 6833767 |
Frequency synthesizer using digital pre-distortion and method |
Dec. 21, 2004 |
| 6803828 |
Lock detector for phase locked loops |
Oct. 12, 2004 |
| 6774738 |
Trimming method for a transceiver using two-point modulation |
Aug. 10, 2004 |
| 6771133 |
Phase-locked oscillator with improved digital integrator |
Aug. 3, 2004 |
| 6765879 |
Communications apparatus, frequency control method for communications apparatus, and recording medium |
Jul. 20, 2004 |
| 6717476 |
Modulator |
Apr. 6, 2004 |
| 6718276 |
Method and apparatus for characterizing frequency response on an error performance analyzer |
Apr. 6, 2004 |
| 6674331 |
Method and apparatus for simplified tuning of a two-point modulated PLL |
Jan. 6, 2004 |
| 6650193 |
Oscillator with a noise reduction function, a writer, and a method of controlling a writer |
Nov. 18, 2003 |
| 6636816 |
Vector signal analysis method and apparatus therefor |
Oct. 21, 2003 |
| 6580328 |
Lock detector for phase locked loops |
Jun. 17, 2003 |
| 6501583 |
Optical receiver module optical transmitter module phase-locked loop circuit voltage-controlled oscillator and frequency response controllable amplifier |
Dec. 31, 2002 |
| 6442188 |
Phase locked loop |
Aug. 27, 2002 |
| 6417738 |
Adaptive frequency-hopping oscillators |
Jul. 9, 2002 |
| 6396355 |
Signal generator having fine resolution and low phase noise |
May. 28, 2002 |
| 6345173 |
Frequency modulator |
Feb. 5, 2002 |
| 6281823 |
Direct digital synthesis using a sine weighted DAC |
Aug. 28, 2001 |
| 6268780 |
Frequency synthesizer with digital frequency lock loop |
Jul. 31, 2001 |
| 6262634 |
Phase-locked loop with built-in self-test of phase margin and loop gain |
Jul. 17, 2001 |
| 6259326 |
Clock recovery from a burst-mode digital signal each packet of which may have one of several predefined frequencies |
Jul. 10, 2001 |
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