Amplifiers – With semiconductor amplifying device – Including plural amplifier channels
Patent
1988-12-23
1990-10-02
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including plural amplifier channels
330254, H03F 368
Patent
active
049610570
ABSTRACT:
An AGC amplifier for compensating a signal loss in a cable through which a signal having a frequency is passed, the signal loss being defined as a function of a square-root of the frequency, having a wide compensation ability and adaptable to the forming of a LSI circuit construction. The AGC amplifier includes a first amplifier (10) amplifying an input signal (IN) to be compensated at a first gain (A.sub.0), a differential circuit (40) having a constant differential coefficient defined by the frequency, and differentiating the input signal at the differential coefficient, a second amplifier (20) amplifying the differentiated signal at a second gain (A.sub.1), and an adding circuit (30) adding the amplified signals therefrom to output an output signal (OUT) in which the signal loss is compensated.
REFERENCES:
patent: 4792744 (1988-12-01), Antoine
Shigei, et al, "High Speed PCM" pp. 216-222, Corona.
Fujitsu Limited
Mottola Steven
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