Differential operational amplifier

Details Differential operational amplifier Differential operational amplifier

1991-10-15

1992-10-20

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330259, H03F 345, H03F 316

Patent

active

051573490

ABSTRACT:
The output stage of a differential operational amplifier includes a source follower amplifier and a common source amplifier which are driven by two complementary outputs of a differential input stage. Continuous-time feedback circuits are provided to set the quiescent biasing conditions accurately. The differential operational amplifier has a low output impedance and a large output voltage swing with negligible open loop gain degradation when the size of the load resistance is varied. Floating compensation capacitors reduce the total capacitor value and the physical area needed for the operational amplifier.

REFERENCES:
patent: 4241313 (1980-12-01), Takehara
patent: 4656436 (1987-04-01), Saari

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