Signal level control circuit for amplifiers

Details Signal level control circuit for amplifiers Signal level control circuit for amplifiers

1998-08-26

2000-04-18

Mottola, Steven J.

Amplifiers

With semiconductor amplifying device

Including temperature compensation means

330284, H03G 320

Patent

active

060520310

ABSTRACT:
An amplifier (125) includes a gain stage (210) for amplifying a signal, a variable attenuator (208), such as a Bode circuit, coupled to the gain stage (210) for attenuating the signal, and a signal level control circuit (222, 218, 220) coupled to the variable attenuator (208) and the gain stage (210) The signal level control circuit includes a thermal circuit (218) for measuring a temperature and a removable automatic gain control (AGC) circuit (220) for measuring signal level output by the gain stage (210). An adapter (222) coupled to the thermal circuit (218) and the removable AGC circuit (220) for controlling attenuation of the variable attenuator (208) in response to the temperature when the removable AGC circuit (220) is not electrically coupled to the gain stage (210) and in response to the signal level when the removable AGC circuit (220) is electrically coupled to the gain stage (210).

REFERENCES:
patent: 5109286 (1992-04-01), West et al.
patent: 5177453 (1993-01-01), Russell et al.
patent: 5381115 (1995-01-01), Timmons et al.
patent: 5488413 (1996-01-01), Elder et al.

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