Automatic gain control circuit using PIN diode capable of improv

Details Automatic gain control circuit using PIN diode capable of improv Automatic gain control circuit using PIN diode capable of improv

1997-07-01

2000-02-22

Peng, John K.

Television

Receiver circuitry

Tuning

348731, 348735, 348712, 348713, 4552391, 4552401, 4552481, 4552491, H04N 550

Patent

active

060286474

ABSTRACT:
An input high frequency signal passes through a PIN diode having a variable high frequency resistance and is output from an AGC circuit. The PIN diode is connected so as to be biased forward between an AGC signal level and a fixed voltage level (such as ground potential). A bias resistor and a coil are connected in series between a node on the output side of the PIN diode and a node supplied with the ground potential. More specifically, the resistor and the coil are inserted in parallel between the transmission path for high frequency signals and the ground potential.

REFERENCES:
patent: 3823379 (1974-07-01), George
patent: 4275362 (1981-06-01), Harford
patent: 4369414 (1983-01-01), Aoki et al.
patent: 4520507 (1985-05-01), Moon
patent: 5243300 (1993-09-01), Kubo
patent: 5270824 (1993-12-01), Dobrovolny
patent: 5774194 (1998-06-01), Armbruster

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