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Class Information
Number: 329/341
Name: Demodulators > Frequency modulation demodulator > Input signal converted to and processed in pulse form (e.g., pulse counter or digital type demodulator)
Description: Subject matter in which the frequency modulated input signal is first changed to a pulse equivalent and then processed.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7245673 |
Windowed multiuser detection |
Jul. 17, 2007 |
| 7071773 |
Digital phase locked loop |
Jul. 4, 2006 |
| 6943847 |
FM demodulator for SECAM decoder |
Sep. 13, 2005 |
| 6646500 |
Integrated circuit having an FM demodulator and method therefor |
Nov. 11, 2003 |
| 6639459 |
Demodulator using digital circuitry |
Oct. 28, 2003 |
| 6630820 |
Method and apparatus for measuring the instantaneous frequency of FM signals |
Oct. 7, 2003 |
| 6597251 |
Method for demodulating signal |
Jul. 22, 2003 |
| 6518836 |
Frequency-variation type demodulator and demodulating method |
Feb. 11, 2003 |
| 6496547 |
Digital FM receiver employing combined sample-and-hold and integrate-and-dump detectors for improved bit error rates |
Dec. 17, 2002 |
| 6459333 |
Differentiate and divide FM demodulator |
Oct. 1, 2002 |
| 6396338 |
Variable delay line detector |
May. 28, 2002 |
| 6294953 |
High sensitivity demodulator for a radio tag and method |
Sep. 25, 2001 |
| 6269128 |
Clock recovery control in differential detection |
Jul. 31, 2001 |
| 6265933 |
FM demodulator |
Jul. 24, 2001 |
| 6229386 |
Digital FM demodulation circuit |
May. 8, 2001 |
| 6172557 |
Time counting circuit, pulse converting circuit and FM demodulating circuit |
Jan. 9, 2001 |
| 6163209 |
Demodulation of angle modulated carriers using a noncoherent reference |
Dec. 19, 2000 |
| 6137353 |
Linearized integrated FM demodulator using a plurality of cascaded all-pass filters or a bessel filter |
Oct. 24, 2000 |
| 6121829 |
Frequency demodulator |
Sep. 19, 2000 |
| 6081155 |
Digital quadrature discriminator for demodulation of frequency-modulated information |
Jun. 27, 2000 |
| 6075410 |
Method and device for digitally demodulating a frequency modulated signal |
Jun. 13, 2000 |
| 6064255 |
Pulse counting FM demodulator |
May. 16, 2000 |
| 6031418 |
Method and apparatus for demodulating digital frequency modulation (FM) signals |
Feb. 29, 2000 |
| 6002726 |
FM discriminator with automatic gain control for digital signal processors |
Dec. 14, 1999 |
| 5990733 |
Delay line ramp demodulator |
Nov. 23, 1999 |
| 5920228 |
Digital demodulation with compensation for phase and frequency of tentatively demodulated signal |
Jul. 6, 1999 |
| 5910752 |
Frequency demodulator with resampled output |
Jun. 8, 1999 |
| 5705949 |
Compensation method for I/Q channel imbalance errors |
Jan. 6, 1998 |
| 5703527 |
Frequency modulated signal demodulator circuit and communication terminal equipment |
Dec. 30, 1997 |
| 5694079 |
Digital FM demodulator using a lagrangian interpolation function |
Dec. 2, 1997 |
| 5684435 |
Analog waveform communications reduced instruction set processor |
Nov. 4, 1997 |
| 5680418 |
Removing low frequency interference in a digital FM receiver |
Oct. 21, 1997 |
| 5661433 |
Digital FM demodulator |
Aug. 26, 1997 |
| 5614862 |
Digital demodulator for a frequency modulated signal and an amplitude modulated signal |
Mar. 25, 1997 |
| 5602847 |
Segregated spectrum RF downconverter for digitization systems |
Feb. 11, 1997 |
| 5570137 |
Device for digital demodulation of video and audio elements of television signal |
Oct. 29, 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 |
| 5550505 |
Frequency shift keying (FSK) demodulator for use in low signal-to-noise ratio environments |
Aug. 27, 1996 |
| 5495204 |
Digital FM demodulator and method with enhanced resolution |
Feb. 27, 1996 |
| 5465071 |
Information signal processing apparatus |
Nov. 7, 1995 |
| 5459432 |
Use of a chopper and a sigma-delta modulator for downconverting and digitizing an analog signal including information modulated by a carrier |
Oct. 17, 1995 |
| 5454007 |
Arrangement for and method of concurrent quadrature downconversion input sampling of a bandpass signal |
Sep. 26, 1995 |
| 5448202 |
Sigma-delta FM demodulator |
Sep. 5, 1995 |
| 5444416 |
Digital FM demodulation apparatus demodulating sampled digital FM modulated wave |
Aug. 22, 1995 |
| 5440265 |
Differential/coherent digital demodulator operating at multiple symbol points |
Aug. 8, 1995 |
| 5440269 |
Digital FM demodulator having an address circuit for a lookup table |
Aug. 8, 1995 |
| 5436589 |
Demodulator for frequency shift keyed signals |
Jul. 25, 1995 |
| 5345188 |
Sigma-delta digital FM demodulator |
Sep. 6, 1994 |
| 5329242 |
Method and apparatus for signal demodulation using time-intervals |
Jul. 12, 1994 |
| 5325396 |
Subscriber unit for wireless digital subscriber communication system |
Jun. 28, 1994 |
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