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Class Information
Number: 329/305
Name: Demodulators > Phase shift keying or quadrature amplitude demodulator > Including discrete semiconductor device
Description: Subject matter containing an electrical device whose constituent portions are constructed from solid material having room temperature conductivity between that of a conductor and an insulator and which conductivity is typically modified through the addition of small amounts of dopant.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7245655 |
Dual antenna receiver |
Jul. 17, 2007 |
| 6839389 |
Digital quadrature demodulation and decimation without multipliers |
Jan. 4, 2005 |
| 6466086 |
Quadrature demodulator with phase-locked loop |
Oct. 15, 2002 |
| 6341146 |
Phase-shift-keying demodulator and demodulation method using a period-width windowing technique |
Jan. 22, 2002 |
| 5790032 |
Method of and apparatus for detecting living bodies |
Aug. 4, 1998 |
| 5790600 |
Method of compensating differences in group propagation times between the analog filters of a transmitter and between those of a receiver for signals in phase quadrature corresponding compensa |
Aug. 4, 1998 |
| 5734295 |
Quadrature demodulator having active filters formed with emitter follower output stages |
Mar. 31, 1998 |
| 5521938 |
Apparatus for performing frequency conversion in a communication system |
May. 28, 1996 |
| 5473280 |
Modulation/demodulation method and system for realizing quadrature modulation/demodulation technique used in digital mobile radio system with complex signal processing |
Dec. 5, 1995 |
| 5469126 |
I/Q-modulator and I/Q-demodulator |
Nov. 21, 1995 |
| 5412351 |
Quadrature local oscillator network |
May. 2, 1995 |
| 5311151 |
I/Q modulator and demodulator having a single bridge |
May. 10, 1994 |
| 5307021 |
Phase-error detecting circuit for QDPSK demodulator |
Apr. 26, 1994 |
| 5122765 |
Direct microwave modulation and demodulation device |
Jun. 16, 1992 |
| 5014316 |
Compatible quadrature amplitude modulation detector system |
May. 7, 1991 |
| 5001723 |
Sinusoidal M-ary orthogonal keyed decoding |
Mar. 19, 1991 |
| 4870382 |
High frequency lock detecting circuit |
Sep. 26, 1989 |
| 4628272 |
Tuned inductorless active phase shift demodulator |
Dec. 9, 1986 |
| 4594555 |
Frequency selective sampling detector |
Jun. 10, 1986 |
| 4484143 |
CCD Demodulator circuit |
Nov. 20, 1984 |
| 4471313 |
Demodulator for phase difference demodulated signals |
Sep. 11, 1984 |
| 4389615 |
CCD Demodulator circuit |
Jun. 21, 1983 |
| 4377728 |
Phase locked loop with improved lock-in |
Mar. 22, 1983 |
| 4361817 |
Bi-phase modulator/demodulator |
Nov. 30, 1982 |
| 4352071 |
Planar QPSK demodulator |
Sep. 28, 1982 |
| 4281293 |
Planar QPSK demodulator |
Jul. 28, 1981 |
| 4021743 |
Phase logic demodulator |
May. 3, 1977 |
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