Low bias, high slew rate operational amplifier

Details Low bias, high slew rate operational amplifier Low bias, high slew rate operational amplifier

1989-05-31

1990-06-19

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330267, H03F 345

Patent

active

049357034

ABSTRACT:
A bias current source for the output stage of an operational amplifier is controllable. The bias current generator senses the voltage differential on the differential operational amplifier inputs. When an input differential voltage is sensed which generates a rising output signal, additional bias current is provided to the output stage. When the output voltage is constant or falling, the bias current to the output stage is decreased.

REFERENCES:
patent: 4077013 (1978-02-01), Morez et al.
patent: 4240040 (1980-12-01), Saari
patent: 4317083 (1982-02-01), Boyd
patent: 4331930 (1982-05-01), Shibata et al.
patent: 4454479 (1984-06-01), Spires
patent: 4455674 (1984-06-01), Sano
patent: 4471322 (1984-09-01), Yamaguchi et al.
patent: 4594560 (1986-06-01), Dingwall et al.
patent: 4739281 (1988-04-01), Doyle
patent: 4837523 (1989-06-01), Wright

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