Signal level stabilizer

Details Signal level stabilizer Signal level stabilizer

1977-09-21

1978-11-07

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

330 59, 330280, 330308, H03G 330

Patent

active

041248252

ABSTRACT:
A signal level stabilizer includes two amplifier stages, each stage having a respective feed-back loop to control its gain. The gains of the amplifiers are varied in response to variations in the level of the input signal to give a substantially constant output signal. At low levels of the input signal the gain of one of the amplifiers only is varied in response to variations of the input signal and at high levels of the input signal the gain of the other amplifier is varied. The amplifiers may be part of a repeater in an optical communications linkage and one of the amplifiers may then be a photodiode and the other a power amplifier.

REFERENCES:
patent: 2866015 (1958-12-01), Sailor
patent: 3697883 (1972-10-01), Wilcox
patent: 3949233 (1976-04-01), Gluck

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