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Class Information
Number: 455/340
Name: Telecommunications > Receiver or analog modulated signal frequency converter > With particular receiver circuit > Coupling or decoupling between stages > Variably tunable or adjustable
Description: Systems wherein the coupling or decoupling means is recited as variably tunable or adjustable whereby the extent of the effective coupling or the width of the band passed by the network may be varied.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4316108 |
Tracking filter for FM threshold extension |
Feb. 16, 1982 |
| 4229826 |
Wide band impedance matching device |
Oct. 21, 1980 |
| 4204166 |
Very high frequency tuner |
May. 20, 1980 |
| 4189678 |
Combination VHF-UHF tuner for use in a television receiver |
Feb. 19, 1980 |
| 4153887 |
Electrically tunable bandpass filter |
May. 8, 1979 |
| 4132951 |
Digital processor controlled radio system |
Jan. 2, 1979 |
| 4132950 |
Clarifying radio receiver |
Jan. 2, 1979 |
| 4048578 |
R.F. amplifier circuit |
Sep. 13, 1977 |
| 4045740 |
Method for optimizing the bandwidth of a radio receiver |
Aug. 30, 1977 |
| 4030036 |
Bandwidth changing circuit |
Jun. 14, 1977 |
| 3992674 |
Balanced dual output mixer circuit |
Nov. 16, 1976 |
| 3991374 |
Controllable bandwidth IF filter circuit for radio receivers |
Nov. 9, 1976 |
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