Folded cascode amplifier

Details Folded cascode amplifier Folded cascode amplifier

1990-05-01

1991-05-14

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330255, 330258, 330311, H03F 345

Patent

active

050159666

ABSTRACT:
An operational amplifier comprises two amplifiers of like circuit configuration and complementary conductivity type connected in parallel. Each amplifier includes a folded cascode input section for providing a first stage of amplification, a class A, push-pull output section for providing a final stage of amplification, a bias section for providing bias voltages to the other sections, and a common made feedback (CMF) section. Each CMF section adjusts the output voltage of its associated input stage to the desired quiescent voltage to compensate for any process differences in the input section. To minimize quiescent power consumption, each CMF section and its associated input section are designed to set the quiescent output voltage of the input section to a level that biases the output transistors of the output section at their threshold voltages.

REFERENCES:
patent: 4333058 (1982-06-01), Hoover
patent: 4377789 (1983-03-01), Hoover
patent: 4554515 (1985-11-01), Burson et al.
patent: 4797631 (1989-01-01), Hsu et al.
De La Plaza et al., "Power-Supply Rejection in Differential Switched-Capacitor Filters", IEEE Journal of Solid-State Circuits, vol. SC-19, No. 6, Dec. 1984, pp. 912-918.
Joseph N. Babanezhad, "A Rail-to-Rail CMOS Op Amp," IEEE Journal of Solid-State Circuits, vol. 23, No. 6, Dec. 1988, p. 1414 et. seq.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1651234