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Class Information
Number: 329/315
Name: Demodulators > Frequency modulation demodulator
Description: Subject matter where the demodulator extracts the modulating signal from a modulated signal which has undergone frequency modulation.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7420409 |
Phase locked loop demodulator with gain control |
Sep. 2, 2008 |
| 7418033 |
Selectively filtering a signal |
Aug. 26, 2008 |
| 7405613 |
Differential slope demodulator for low-IF frequencies |
Jul. 29, 2008 |
| 7330068 |
Adjusting coefficients of a filter |
Feb. 12, 2008 |
| 7248649 |
Digital baseband receiver including a time domain compensation module for suppressing group delay variation distortion incurred due to analog low pass filter deficiencies |
Jul. 24, 2007 |
| 7173982 |
Method and circuit for digitally correcting the frequency of a signal |
Feb. 6, 2007 |
| 7145965 |
Digital demodulator for terrestrial receiver |
Dec. 5, 2006 |
| 7136433 |
Frequency offset cancellation circuit for data determination in FM wireless communications |
Nov. 14, 2006 |
| 7026864 |
Non-coherent FSK demodulator |
Apr. 11, 2006 |
| 7006806 |
System and method for SAP FM demodulation |
Feb. 28, 2006 |
| 6985029 |
Circuit configuration for tolerance correction in a frequency demodulator |
Jan. 10, 2006 |
| 6972617 |
FM demodulator including a DC offset detector |
Dec. 6, 2005 |
| 6850113 |
Demodulator and communication device using the same |
Feb. 1, 2005 |
| 6809584 |
Signal transmission and receiving methods optimized for integrated circuit implementation |
Oct. 26, 2004 |
| 6724247 |
FM demodulator having DC offset compensation |
Apr. 20, 2004 |
| 6714025 |
Method and apparatus for synchronous demodulation of multiply modulated signals |
Mar. 30, 2004 |
| 6677816 |
Circuit arrangement for demodulating signals |
Jan. 13, 2004 |
| 6664849 |
Digital FM demodulator performing amplitude compensation |
Dec. 16, 2003 |
| 6639458 |
FM demodulator capable of providing demodulated data with high determination accuracy |
Oct. 28, 2003 |
| 6611571 |
Apparatus and method for demodulating an angle-modulated signal |
Aug. 26, 2003 |
| 6605989 |
FM demodulator using a single input signal |
Aug. 12, 2003 |
| 6573782 |
Sigma delta FM ratio detector |
Jun. 3, 2003 |
| 6567480 |
Method and apparatus for sampling timing adjustment and frequency offset compensation |
May. 20, 2003 |
| 6483381 |
Signal transmission and receiving methods optimized for integrated circuit implementation |
Nov. 19, 2002 |
| 6438179 |
Frequency demodulation apparatus and method |
Aug. 20, 2002 |
| 6323727 |
Apparatus and method for detecting digital FM |
Nov. 27, 2001 |
| 6265933 |
FM demodulator |
Jul. 24, 2001 |
| 6256358 |
Digital signal processing architecture for multi-band radio receiver |
Jul. 3, 2001 |
| 6246732 |
Demodulator including adaptive equalizer and demodulating method in digital communications |
Jun. 12, 2001 |
| 6163209 |
Demodulation of angle modulated carriers using a noncoherent reference |
Dec. 19, 2000 |
| 6058291 |
Methods and apparatus for carrier suppression in a radio modulator |
May. 2, 2000 |
| 6058145 |
Method of demodulating a multi-frequency quadrature modulated signal |
May. 2, 2000 |
| 6002298 |
Reconstituted frequency modulation with feedforward demodulator |
Dec. 14, 1999 |
| 5994953 |
Apparatus and method for detecting digital FM |
Nov. 30, 1999 |
| 5982821 |
Frequency discriminator and method and receiver incorporating same |
Nov. 9, 1999 |
| 5898739 |
QPSK demodulator for obtaining phase by arithmetic operation |
Apr. 27, 1999 |
| 5857165 |
Method and apparatus for communication with chaotic and other waveforms |
Jan. 5, 1999 |
| 5781077 |
Reducing transformer interwinding capacitance |
Jul. 14, 1998 |
| 5572164 |
FM demodulator with threshold extension and receiver comprising such an FM demodulator |
Nov. 5, 1996 |
| 5568305 |
Heterodyne receiver provided with a frequency discriminator for coherent lightwave communications |
Oct. 22, 1996 |
| 5465071 |
Information signal processing apparatus |
Nov. 7, 1995 |
| 5450033 |
Frequency demodulation circuit |
Sep. 12, 1995 |
| 5418489 |
Method of recovering a frequency modulated signal |
May. 23, 1995 |
| 5251232 |
Radio communication apparatus |
Oct. 5, 1993 |
| 5220583 |
Digital FM demodulator with a reduced sampling rate |
Jun. 15, 1993 |
| 5214708 |
Speech information extractor |
May. 25, 1993 |
| 5138273 |
FM demodulator |
Aug. 11, 1992 |
| 5103463 |
Method and system for encoding and decoding frequency shift keying signals |
Apr. 7, 1992 |
| 5073898 |
Communication device |
Dec. 17, 1991 |
| 5007069 |
Decoding of signals using cophase and differentiating signal detection |
Apr. 9, 1991 |
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