Rail-to-rail opamp with large sourcing current and small quiesce

Details Rail-to-rail opamp with large sourcing current and small quiesce Rail-to-rail opamp with large sourcing current and small quiesce

1993-05-10

1994-05-24

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330255, 330257, H03F 345

Patent

active

053152646

ABSTRACT:
A rail-to-rail CMOS operational amplifier with a large source current and small quiescent current. The CMOS opamp includes a folded cascode input structure, a negative slew detector and an output stage that acts as a push-pull output stage during slewing and a Class A output stage during small signal operation. The opamp can drive large capacitive loads (in excess of 0.5 .mu.F), with the load capacitor providing for the opamp frequency compensation.

REFERENCES:
patent: 5177450 (1993-01-01), Lee et al.

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