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Class Information
Number: 455/339
Name: Telecommunications > Receiver or analog modulated signal frequency converter > With particular receiver circuit > Coupling or decoupling between stages > Band pass filter
Description: Systems wherein the coupling means comprises a band pass filter.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5465410 |
Method and apparatus for automatic frequency and bandwidth control |
Nov. 7, 1995 |
| 5428814 |
Space communications apparatus employing switchable band filters for transparently switching signals on board a communications satellite, payload architectures using such apparatus, and method |
Jun. 27, 1995 |
| 5410742 |
SAW electric part and frequency conversion circuit |
Apr. 25, 1995 |
| 5396657 |
Selectable filter for reducing Gaussian noise, co-channel and adjacent channel interference in a radio-telephone receiver |
Mar. 7, 1995 |
| 5392456 |
Method of controlling filter time constant and filter circuit having the time constant control function based on the method |
Feb. 21, 1995 |
| 5379456 |
Multiplying saw phase shift envelope detector |
Jan. 3, 1995 |
| 5369470 |
FM receiver which detects and responds to receiving and interference states |
Nov. 29, 1994 |
| 5313662 |
Split-ring resonator bandpass filter with adjustable zero |
May. 17, 1994 |
| 5287558 |
FM receiver |
Feb. 15, 1994 |
| 5263192 |
Integrated resonant circuit with temperature compensated quality factor |
Nov. 16, 1993 |
| 5212828 |
Receiver apparatus |
May. 18, 1993 |
| 5170498 |
Band switching filter and satellite broadcast receiving system using the same |
Dec. 8, 1992 |
| 5170500 |
Intermediate frequency circuit for cellular telephone transceiver using surface acoustic wave filter |
Dec. 8, 1992 |
| 5129100 |
Agile output band pass filter for agile up converter |
Jul. 7, 1992 |
| 5077835 |
Receiver circuit |
Dec. 31, 1991 |
| 5068893 |
Television signal processing network for subscription television jamming signals |
Nov. 26, 1991 |
| 5065453 |
Electrically-tunable bandpass filter |
Nov. 12, 1991 |
| 5057803 |
Stripline split ring resonator bandpass filter |
Oct. 15, 1991 |
| 5042085 |
Radio frequency data communication band pass filter |
Aug. 20, 1991 |
| 5023933 |
Superheterodyne SCA receiver and method for the manufacture thereof |
Jun. 11, 1991 |
| 5020092 |
Dual-bandwidth cellular telephone |
May. 28, 1991 |
| 4989264 |
Bandwidth limiting circuit with variable bandwidth |
Jan. 29, 1991 |
| 4984292 |
Bandpass amplifier and receiver using bandpass amplifier |
Jan. 8, 1991 |
| 4965853 |
Radio receiver circuit with tuning feedback control for a tunable bandpass filter |
Oct. 23, 1990 |
| 4856024 |
Data transceiving modem |
Aug. 8, 1989 |
| 4807036 |
Complex circuit component for a video signal circuit in a television receiver set |
Feb. 21, 1989 |
| 4792993 |
TVRD receiver system with automatic bandwidth adjustment |
Dec. 20, 1988 |
| 4783843 |
Split band filter for cellular mobile radio |
Nov. 8, 1988 |
| 4756024 |
RF-input circuit arrangement for a television tuner |
Jul. 5, 1988 |
| 4748667 |
Jamming signal scrambling and descrambling systems for CATV |
May. 31, 1988 |
| 4736457 |
Circuit arrangement for a tuner for changing over two frequency bands |
Apr. 5, 1988 |
| 4429279 |
Variable bandwidth filter |
Jan. 31, 1984 |
| 4406019 |
Selectivity means in amplitude modulated radio receivers |
Sep. 20, 1983 |
| 4399561 |
Variable capacitance circuit |
Aug. 16, 1983 |
| 4397037 |
Diplexer for television tuning systems |
Aug. 2, 1983 |
| 4385402 |
Switchable filter circuits |
May. 24, 1983 |
| 4339829 |
Automatic tuning system for a narrow bandwidth communication |
Jul. 13, 1982 |
| 4323866 |
Filter circuit |
Apr. 6, 1982 |
| 4316108 |
Tracking filter for FM threshold extension |
Feb. 16, 1982 |
| 4207532 |
Frequency signal splitting circuit |
Jun. 10, 1980 |
| 4153887 |
Electrically tunable bandpass filter |
May. 8, 1979 |
| 4145656 |
Transceiver capable of sensing a clear channel |
Mar. 20, 1979 |
| 4140975 |
Highly selective programmable filter module |
Feb. 20, 1979 |
| 4132950 |
Clarifying radio receiver |
Jan. 2, 1979 |
| 4096576 |
Analogue filter systems |
Jun. 20, 1978 |
| 4086593 |
AM removal and phaselock receiver |
Apr. 25, 1978 |
| 4080602 |
Wireless control system for a travelling toy using a single transmitting and receiving channel |
Mar. 21, 1978 |
| 4079330 |
System for demodulating angle-modulated signals |
Mar. 14, 1978 |
| 3991419 |
Receiver system for locating transmitters |
Nov. 9, 1976 |
| 3965423 |
Automatic frequency control system |
Jun. 22, 1976 |
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