Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1988-04-11
1989-04-04
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including differential amplifier
307492, 330285, H03F 345, G06G 724
Patent
active
048189510
ABSTRACT:
This invention concerns, in a current-controlled amplifier circuit, the combination of output amplifier means having an input conductor and having an output conductor for converting a signal at the input conductor of the output amplifier means to a current amplified signal, feedback means connected between the output and input conductors of the output amplifier means and including a differential pair of semiconductors having a control current output, for presenting a signal at the input conductor of the output amplifier means which is the product of an input signal to the amplifier circuit and the ratio of a reference current to the control current and for substantially eliminating dc input at the input conductor of the output amplifier means and setting the quiescent currents of the semiconductors of the differential pair substantially equal.
REFERENCES:
patent: 4225794 (1980-09-01), Buff
patent: 4335361 (1982-06-01), Acker
patent: 4341962 (1982-07-01), Buff
Mottola Steven
Peavey Electronics Corporation
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