Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1987-12-04
1989-09-05
Wan, Gene
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330282, H03F 345, H03G 330
Patent
active
048642487
ABSTRACT:
An amplifier arrangement with controllable gain comprising two differential amplifiers which are connected in parallel at their inputs and outputs and which have different gain factors which can be varied oppositely. The gain of one of said differential amplifiers is reduced in that a first resistor is connected between its input terminals and a second resistor is connected between at least one of said input terminals and the corresponding input terminal of the other differential amplifier. As a result, the input signal to this amplifier is subject to a voltage division enabling the input swing to be increased.
REFERENCES:
patent: 3909738 (1978-09-01), Niimi
Franzblau Bernard
U.S. Philips Corp.
Wan Gene
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