Summing amplifier for developing a squelch and meter voltage in

Details Summing amplifier for developing a squelch and meter voltage in Summing amplifier for developing a squelch and meter voltage in

1977-12-16

1979-03-06

Mullins, James B.

Amplifiers

With amplifier condition indicating or testing means

325398, 325403, 325478, 330138, 330280, H03G 334

Patent

active

041433319

ABSTRACT:
In a radio receiver IF amplifier, a high gain AGC circuit produces a constant signal output regardless of input signal levels in excess of a threshold value. A summing amplifier responds to the AGC voltage and the IF amplifier current to develop a d - c potential directly proportional to the signal input to the amplifier both above and below the AGC threshold. This voltage is useful in the squelch and signal strength meter circuits.

REFERENCES:
patent: 2164979 (1939-07-01), Wilhelm
patent: 3323066 (1967-05-01), Kurtz
patent: 3434065 (1969-03-01), Chu et al.

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