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Class Information
Number: 455/257
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Local control of receiver operation > Local oscillator frequency control > Automatic
Description: Subject matter wherein the control means consists of a self-acting control circuit or loop whereby the output frequency of the oscillator means or the output of the mixer means is maintained constant at a desired frequency or within a desired frequency range. The control circuit or loop generally includes discriminator means for sensing the deviation of the oscillator output frequency in direction and amount with means for producing a control energy corresponding to the sensed deviation and applying the generated control energy to a controlling means in the oscillator circuit in the proper sense or direction to restore the oscillator output frequency to a desired value.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7596365 |
Device for transmitting and receiving |
Sep. 29, 2009 |
| 7570926 |
RF transceiver with compact stacker mixer design for multiple frequency conversion |
Aug. 4, 2009 |
| 7565112 |
Reduced adjacent channel interference in a radio receiver |
Jul. 21, 2009 |
| 7541884 |
Methods and apparatus for crystal oscillator drift estimation and compensation |
Jun. 2, 2009 |
| 7509108 |
Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence |
Mar. 24, 2009 |
| 7447483 |
Radio apparatus and a method for reducing interference in a radio apparatus |
Nov. 4, 2008 |
| 7313379 |
Generation of a self-correcting local oscillation |
Dec. 25, 2007 |
| 7295824 |
Frequency multiplier pre-stage for fractional-N phase-locked loops |
Nov. 13, 2007 |
| 7233774 |
RF transceiver with compact stacked mixer design for multiple frequency conversion |
Jun. 19, 2007 |
| 7206560 |
Chopped intermediate frequency wireless receiver |
Apr. 17, 2007 |
| 7133647 |
Chiprate correction in digital transceivers |
Nov. 7, 2006 |
| 7133653 |
Receiver and composite component having local oscillator components and mixing circuit integrally formed on semiconductor substrate |
Nov. 7, 2006 |
| 7103339 |
Automatic frequency correction method and receiver for time division duplex modes of 3G wireless communications |
Sep. 5, 2006 |
| 7095989 |
Frequency translating devices and frequency translating measurement systems with DC bias added to a mixer diode |
Aug. 22, 2006 |
| 7082295 |
On-chip loop filter for use in a phase locked loop and other applications |
Jul. 25, 2006 |
| 7079826 |
Digitally controlled analog RF filtering in subsampling communication receiver architecture |
Jul. 18, 2006 |
| 7035605 |
Method and device for automatic control of the frequency of a local oscillator in a DS-CDMA type receiver |
Apr. 25, 2006 |
| 7002233 |
Integrated circuit including an inductive element having a large quality factor and being highly compact |
Feb. 21, 2006 |
| 6980774 |
Radio frequency integrated circuit |
Dec. 27, 2005 |
| 6975839 |
Apparatus, and associated method, for estimating frequency offset using filtered, down-sampled likelihood polynomials |
Dec. 13, 2005 |
| 6968165 |
Frequency scanning receiver permitting quick PPL setting |
Nov. 22, 2005 |
| 6850745 |
Method and apparatus for generating a self-correcting local oscillation |
Feb. 1, 2005 |
| 6829469 |
Method and a device for producing a signal |
Dec. 7, 2004 |
| 6813482 |
Radio communication apparatus and method |
Nov. 2, 2004 |
| 6748036 |
Radio receiving method and apparatus |
Jun. 8, 2004 |
| 6658241 |
Radio receiver automatic frequency control techniques |
Dec. 2, 2003 |
| 6625434 |
Method of performing automatic frequency control in a mobile station during in speech communication mode |
Sep. 23, 2003 |
| 6606487 |
Automatic frequency correction method and apparatus for time division duplex modes of 3G wireless communications |
Aug. 12, 2003 |
| 6359944 |
Tuning system for achieving quick acquisition times for a digital satellite receiver |
Mar. 19, 2002 |
| 6304620 |
Sign-cross product automatic frequency control loop |
Oct. 16, 2001 |
| 6278867 |
Methods and systems for frequency generation for wireless devices |
Aug. 21, 2001 |
| 6215990 |
Method and apparatus for minimizing initial frequency errors during transceiver power up |
Apr. 10, 2001 |
| 6181923 |
Automatic frequency control circuit and method of automatic frequency control |
Jan. 30, 2001 |
| 6175726 |
Receiver architecture for the receiving of angle-modulated/angle-keyed carrier signals |
Jan. 16, 2001 |
| RE36973 |
Digitally-corrected temperature-compensated crystal oscillator having a correction-suspend control for communications service |
Nov. 28, 2000 |
| 6144844 |
Method and system for controlling frequency |
Nov. 7, 2000 |
| 6108525 |
Transceiver |
Aug. 22, 2000 |
| 6101369 |
Radio pager |
Aug. 8, 2000 |
| 6064867 |
Receiving apparatus with automatic frequency controlling |
May. 16, 2000 |
| 6044118 |
Method for adjusting the frequency of an oscillator for a receiver circuit |
Mar. 28, 2000 |
| 6029054 |
MMIC receiver |
Feb. 22, 2000 |
| 6020790 |
Oscillator calibration method and circuit and radio with oscillator |
Feb. 1, 2000 |
| 5974098 |
Received signal detector for digital demodulator |
Oct. 26, 1999 |
| 5970397 |
Method for the frequency correction of multicarrier signals and related apparatus |
Oct. 19, 1999 |
| 5949830 |
Small wireless radio |
Sep. 7, 1999 |
| 5898707 |
Data sampling circuit and portable radio terminal device |
Apr. 27, 1999 |
| 5757858 |
Dual-mode digital FM communication system |
May. 26, 1998 |
| 5678215 |
Method for frequency locking onto a pilot reference signal affected by multipath fading |
Oct. 14, 1997 |
| 5541966 |
System and circuit for estimating the carrier frequency of a PSK numeric signal |
Jul. 30, 1996 |
| 5479452 |
Method and apparatus for aligning a digital receiver |
Dec. 26, 1995 |
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