AGC voltage correction circuit

Details AGC voltage correction circuit AGC voltage correction circuit

1997-04-16

1999-05-04

Lee, Benny T.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330256, H03F 345

Patent

active

059007826

ABSTRACT:
An object of the present invention is to provide an AGC voltage correction circuit unaffected by a change in temperature.
Since base-emitter voltages V.sub.BE of transistors Q9 and Q10 constituting a first reference current source 7 have temperature dependency, the variations of the gains of amplification transistors Q17 and Q18 dependent on temperature are diminished. Since transistors Q1 and Q2 constituting a second reference current source 2 have temperature dependency, a gain slope concerning amplification transistors Q17 and Q18 relative to temperature is corrected linearly.

REFERENCES:
patent: 4101841 (1978-07-01), Okada et al.
patent: 4636742 (1987-01-01), Oritani
patent: 4963836 (1990-10-01), Noguchi et al.
patent: 5030923 (1991-07-01), Arai
patent: 5327097 (1994-07-01), Igarashi et al.

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