Operational amplifier circuit

Details Operational amplifier circuit Operational amplifier circuit

1989-08-24

1991-01-22

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

323313, 330257, 330259, H03F 345

Patent

active

049873792

ABSTRACT:
An operational amplifier circuit comprises a differential input stage (22) and an output transistor (N3) driven by an output (24) of the differential input stage. Means (N4, P3, P5) for generating a bias current for the differential input stage are constructed so that in operation the bias current is in a predetermined proportion to the current flowing in the output transistor (N3) and is substantially independent of the impedance (Z) of any load driven by the output transistor, thereby eliminating a systematic offset error. The means for generating the bias current may include a further transistor (N4) driven by the output of the differential input stage.

REFERENCES:
patent: 4092611 (1978-05-01), Frederiksen et al.
patent: 4287439 (1981-09-01), Leuschner

Affiliated with

Also associated with

Rating

Operational amplifier circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Operational amplifier circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operational amplifier circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1556997