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Class Information
Number: 329/318
Name: Demodulators > Frequency modulation demodulator > Having specific distortion, noise or other interference prevention, reduction or compensation
Description: Subject matter including the neutralization of an undesirable characteristic of a frequency modulation demodulator or its signals.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7428280 |
Receiving apparatus and transceiver |
Sep. 23, 2008 |
| 7421043 |
Method and/or apparatus for stabilizing the frequency of digitally synthesized waveforms |
Sep. 2, 2008 |
| 7420409 |
Phase locked loop demodulator with gain control |
Sep. 2, 2008 |
| 7330068 |
Adjusting coefficients of a filter |
Feb. 12, 2008 |
| 7277688 |
DC offset correction for very low intermediate frequency receiver |
Oct. 2, 2007 |
| 7260163 |
Noise blanker using an adaptive all-pole predictor and method therefor |
Aug. 21, 2007 |
| 7133476 |
Apparatus and methods for suppression of interference among disparately-modulated signals |
Nov. 7, 2006 |
| 7116734 |
Method and system for providing maximum likelihood detection with decision feedback interference cancellation |
Oct. 3, 2006 |
| 7099647 |
Single chip direct conversion transceiver for reducing DC offset and method of manufacturing the same |
Aug. 29, 2006 |
| 7095799 |
Systems and methods for providing baseband-derived predistortion to increase efficiency of transmitters |
Aug. 22, 2006 |
| 7024608 |
Transmitting method and transmitting apparatus |
Apr. 4, 2006 |
| 6985029 |
Circuit configuration for tolerance correction in a frequency demodulator |
Jan. 10, 2006 |
| 6980785 |
Direct conversion wireless receiver with digital phase equalization |
Dec. 27, 2005 |
| 6977545 |
FM signal receiver and wireless communications device using same |
Dec. 20, 2005 |
| 6972617 |
FM demodulator including a DC offset detector |
Dec. 6, 2005 |
| 6724247 |
FM demodulator having DC offset compensation |
Apr. 20, 2004 |
| 6664849 |
Digital FM demodulator performing amplitude compensation |
Dec. 16, 2003 |
| 6646500 |
Integrated circuit having an FM demodulator and method therefor |
Nov. 11, 2003 |
| 6573782 |
Sigma delta FM ratio detector |
Jun. 3, 2003 |
| 6487240 |
Apparatus for receiving and recovering frequency shift keyed symbols |
Nov. 26, 2002 |
| 6456950 |
Method and apparatus for estimating and digitizing instantaneous frequency and phase of bandpass signals |
Sep. 24, 2002 |
| 6456673 |
Digital radio frequency interference canceller |
Sep. 24, 2002 |
| 6393068 |
Communication channel and frequency offset estimator |
May. 21, 2002 |
| 6304136 |
Reduced noise sensitivity, high performance FM demodulator circuit and method |
Oct. 16, 2001 |
| 6295015 |
Reference generator for demodulator calibration |
Sep. 25, 2001 |
| 6259315 |
FM demodulator being tuned to reference frequency by auxiliary detector |
Jul. 10, 2001 |
| 6121829 |
Frequency demodulator |
Sep. 19, 2000 |
| 6078578 |
Communication apparatus |
Jun. 20, 2000 |
| 6075409 |
Demodulation method and arrangement |
Jun. 13, 2000 |
| 6075410 |
Method and device for digitally demodulating a frequency modulated signal |
Jun. 13, 2000 |
| 6020784 |
FM demodulation circuit |
Feb. 1, 2000 |
| 6014412 |
Digital radio frequency interference canceller |
Jan. 11, 2000 |
| 6009126 |
Zero-IF receiver |
Dec. 28, 1999 |
| 5930310 |
Interference reduction scheme and method |
Jul. 27, 1999 |
| 5847660 |
Method for avoiding interference in a cable telephony system |
Dec. 8, 1998 |
| 5789987 |
Low-noise frequency synthesizer |
Aug. 4, 1998 |
| 5778310 |
Co-channel interference reduction |
Jul. 7, 1998 |
| 5734295 |
Quadrature demodulator having active filters formed with emitter follower output stages |
Mar. 31, 1998 |
| 5705949 |
Compensation method for I/Q channel imbalance errors |
Jan. 6, 1998 |
| 5697085 |
Radio transceiver comprising an arrangement for compensating for a DC component |
Dec. 9, 1997 |
| 5686862 |
FM demodulator integrated on semiconductor chip without discrete circuit components |
Nov. 11, 1997 |
| 5638407 |
Inversion prevention device |
Jun. 10, 1997 |
| 5621349 |
Device for controlling an output level of an FM detecting circuit using phase locked loop |
Apr. 15, 1997 |
| 5619538 |
Pulse shaping FM demodular with low noise where capacitor charge starts on input signal edge |
Apr. 8, 1997 |
| 5557643 |
Automatic frequency control system for GMSK-modulated signals |
Sep. 17, 1996 |
| 5554955 |
Method and apparatus for removing the effects of co-channel interference from the message on a dominant frequency modulated carrier and for recovering the message from each of two co-channel c |
Sep. 10, 1996 |
| 5550868 |
.pi./4-DQPSK delay spread detection and compensation apparatus and method |
Aug. 27, 1996 |
| 5548244 |
Method and apparatus for eliminating DC offset for digital I/Q demodulators |
Aug. 20, 1996 |
| 5541959 |
Method and apparatus for the cancellation of interference in electrical systems |
Jul. 30, 1996 |
| 5535249 |
Precise detection of frequency error for bursts modulated by predetermined symbol sequence |
Jul. 9, 1996 |
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