| |
 |
|
Class Information
Number: 329/343
Name: Demodulators > Frequency modulation demodulator > Input signal converted to and processed in pulse form (e.g., pulse counter or digital type demodulator) > Including digital logic circuitry
Description: Subject matter which includes processing circuitry which is not exclusively of an analog nature.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7298423 |
Time based digital FM demodulator |
Nov. 20, 2007 |
| 6903603 |
Phase detection circuit and receiver |
Jun. 7, 2005 |
| 6646500 |
Integrated circuit having an FM demodulator and method therefor |
Nov. 11, 2003 |
| 6172557 |
Time counting circuit, pulse converting circuit and FM demodulating circuit |
Jan. 9, 2001 |
| 6121829 |
Frequency demodulator |
Sep. 19, 2000 |
| 6081155 |
Digital quadrature discriminator for demodulation of frequency-modulated information |
Jun. 27, 2000 |
| 6072848 |
Method and apparatus for constructing a digital phase differentiator incorporating a dynamic decrement counter |
Jun. 6, 2000 |
| 6035002 |
Digital super-regenerative detector RF receiver |
Mar. 7, 2000 |
| 5982821 |
Frequency discriminator and method and receiver incorporating same |
Nov. 9, 1999 |
| 5942937 |
Signal detection circuit using a plurality of delay stages with edge detection logic |
Aug. 24, 1999 |
| 5910752 |
Frequency demodulator with resampled output |
Jun. 8, 1999 |
| 5903187 |
Monolithically integrable frequency demodulator device |
May. 11, 1999 |
| 5850161 |
Digital FM demodulator using pulse generators |
Dec. 15, 1998 |
| 5818881 |
Digital frequency demodulator |
Oct. 6, 1998 |
| 5808510 |
Demodulator for the demodulation of a frequency-modulated signal |
Sep. 15, 1998 |
| 5703527 |
Frequency modulated signal demodulator circuit and communication terminal equipment |
Dec. 30, 1997 |
| 5614862 |
Digital demodulator for a frequency modulated signal and an amplitude modulated signal |
Mar. 25, 1997 |
| 5517689 |
Phase detecting method and phase detector and FM receiver using phase detecting method |
May. 14, 1996 |
| 5500627 |
Precision duty cycle phase lock loop |
Mar. 19, 1996 |
| 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 |
| 5448202 |
Sigma-delta FM demodulator |
Sep. 5, 1995 |
| 5444416 |
Digital FM demodulation apparatus demodulating sampled digital FM modulated wave |
Aug. 22, 1995 |
| 5345188 |
Sigma-delta digital FM demodulator |
Sep. 6, 1994 |
| 5289543 |
FM receiver and communication systems including same |
Feb. 22, 1994 |
| 5270666 |
Method and circuitry for demodulation of angle modulated signals by measuring cycle time |
Dec. 14, 1993 |
| 5148114 |
FM demodulator |
Sep. 15, 1992 |
| 4992748 |
Period-inverting FM demodulator |
Feb. 12, 1991 |
| 4959620 |
Frequency demodulation circuit |
Sep. 25, 1990 |
| 4951001 |
Limiter and detector circuit and method |
Aug. 21, 1990 |
| 4926133 |
FM demodulator having a frequency independent delay circuit |
May. 15, 1990 |
| 4902979 |
Homodyne down-converter with digital Hilbert transform filtering |
Feb. 20, 1990 |
| 4884037 |
FM demodulation circuit |
Nov. 28, 1989 |
| 4875017 |
Digital FM demodulating apparatus |
Oct. 17, 1989 |
| 4835622 |
Demodulator arrangement |
May. 30, 1989 |
| 4779054 |
Digital inphase/quadrature product detector |
Oct. 18, 1988 |
| 4777450 |
Circuit for demodulating a frequency-modulated signal |
Oct. 11, 1988 |
| 4772853 |
Digital delay FM demodulator with filtered noise dither |
Sep. 20, 1988 |
| 4707666 |
Frequency demodulator circuit with zero-crossing counter |
Nov. 17, 1987 |
| 4696018 |
Digital FM detector for digitized FM signals |
Sep. 22, 1987 |
| 4656431 |
Digital frequency discriminator |
Apr. 7, 1987 |
| 4634989 |
Digital FM detector for a digital signal |
Jan. 6, 1987 |
| 4628272 |
Tuned inductorless active phase shift demodulator |
Dec. 9, 1986 |
| 4620160 |
Digital demodulator for continuously phase or frequency modulated signals |
Oct. 28, 1986 |
| 4608538 |
FM quadrature detector with ferrite bead tuned circuit |
Aug. 26, 1986 |
| 4603301 |
Amplitude insensitive delay lines in a frequency modulated signal detector |
Jul. 29, 1986 |
| 4578653 |
Frequency selective filter circuit |
Mar. 25, 1986 |
| 4574245 |
Multisensor demodulator and A/D converter |
Mar. 4, 1986 |
| 4558284 |
Digital frequency-modulated demodulation |
Dec. 10, 1985 |
| 4547737 |
Demodulator of sampled data FM signals from sets of four successive samples |
Oct. 15, 1985 |
| 4543532 |
Digital FM demodulator |
Sep. 24, 1985 |
|
|
|
