Signal strength meter drive circuit

Details Signal strength meter drive circuit Signal strength meter drive circuit

1977-06-17

1978-08-22

Griffin, Robert L.

325364, 325398, 325455, H04B 116

Patent

active

041092066

ABSTRACT:
A signal strength meter drive circuit for a radio receiver or tuner comprises a bypass resistor R.sub.3 connected in shunt with the output resistor R.sub.1 of a mirror circuit for an IF amplifier output summing transistor Q.sub.10 through a transistor Q.sub.32 whose conduction is controlled by the biasing voltage for the circuit. The mirror circuit current drawn through the bypass resistor regulates the voltage drop across the output resistor, thus compensating for variations in the voltage characteristics of the various circuit elements, such as the Zener voltage, when they are incorporated in a monolithic IC chip.

REFERENCES:
patent: 3333201 (1967-07-01), Hopengarten
patent: 3673499 (1972-06-01), Avins et al.
patent: 3727138 (1973-04-01), Traub
patent: 3748582 (1973-07-01), Ohsawa
patent: 3753120 (1973-08-01), Ohsawa

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