Automatic gain control apparatus

Details Automatic gain control apparatus Automatic gain control apparatus

1977-09-26

1979-04-03

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including gain control means

330141, 330279, 325405, H03G 310

Patent

active

041479912

ABSTRACT:
An apparatus for effecting automatic gain control comprises an attenuator employing pin junction diodes, a high-frequency amplifier employing a bipolar type automatic gain controlling transistor or a MOS-FET which is always supplied with automatic gain control signals, and switching means for selectively applying automatic gain control signals to the attenuator, thereby permitting increase of the gain control variable without deteriorating the noise factor and the cross modulation characteristic of the signal.

REFERENCES:
patent: 2488606 (1949-11-01), Sands
patent: 3408588 (1968-10-01), Rugo
patent: 3518585 (1970-06-01), Wilcox
patent: 4030035 (1977-06-01), Ienaka et al.

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