Operational amplifier stages

Details Operational amplifier stages Operational amplifier stages

1988-08-11

1990-02-13

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330255, 330258, H03F 345

Patent

active

049010301

ABSTRACT:
The improved operational amplifier stages are an input, a gain and an output stage. The input stage has a differential buffer amplifier connected to a transconductance section for converting a differential voltage signal to a current signal. The input stage is operable within a range of differential voltage signals, the range including common mode voltage signals at or beyond the negative supply rail. The gain stage has two cascaded transistors. The base of the first transistor is connected to the emitter of the second transistor through an integrating capacitor. The capacitor is further connected through a resistor to the negative supply rail. The output stage has a driving amplifier and two common emitter output transistors. One output transistor is driven by the amplifier through two current mirrors, the output of the second current mirror being compared to a reference current source. The other output transistor is driven directly by the amplifier.

REFERENCES:
patent: 4417216 (1983-11-01), Davis
patent: 4607232 (1986-08-01), Gill, Jr.
Widlar, Robert J., Low Voltage Techniques, Dec. 6, 1978, pp. 1-8.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1170898