Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1987-06-03
1988-10-25
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
307355, 307497, H03F 345
Patent
active
047806877
ABSTRACT:
A differential amplifier circuit for regenerating complementary analog signals of low amplitude includes a differential pair of field effect transistors whose common sources are connected to a first supply voltage V.sub.SS via a load, a pair of loads which are connected to the drain of each transistor of the differential pair and to a second supply voltage, respectively, and a level regenerating circuit having a pair of diodes for deriving the signals from the drain of each transistor of the differential pair. The signals transported by the diodes are applied to the lower transistor of a pair of push-pull stages whose upper transistor directly receives the signal derived from the drain of the other transistor of the differential pair, while the source of the lower transistors of the push-pull stages is connected to ground and the drain of the upper transistor of these stages is connected to the second supply voltage V.sub.DD, the complementary amplified output signals being available at the central points of the push-pull stages.
REFERENCES:
patent: 4247791 (1981-01-01), Rovell
Biren Steven R.
Briody Thomas A.
Mullins James B.
Tamoshunas Algy
U.S. Philips Corporation
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