CMOS class AB operational amplifier

Details CMOS class AB operational amplifier CMOS class AB operational amplifier

2006-07-18

2006-07-18

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S264000, C330S292000

Reexamination Certificate

active

07078970

ABSTRACT:
A CMOS operational amplifier with a Class AB output stage has an output terminal and an input stage driving the output stage. The Class AB output stage includes a pair of p-channel and n-channel output transistors series-connected between the VDD and VSS supply terminals of a power supply. Each of the output transistors has associated biasing circuitry with a pair of positive and negative driving inputs and a biasing input. The input stage has driving outputs connected to corresponding ones of the driving inputs of the output stage. Each driving output is derived from the drain of a MOS transistor connected in series with a diode connected MOS transistor between the VDD and VSS supply terminals. By avoiding the conventional stacked MOSFETs that would set the minimum supply voltage to more than two threshold voltages, the op-amp can be operated over the full range of supply voltage.

REFERENCES:
patent: 5917378 (1999-06-01), Juang
patent: 6885240 (2005-04-01), Cha
patent: 2001/0024140 (2001-09-01), Taylor

Affiliated with

Also associated with

Rating

CMOS class AB operational amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3605256