Combination trim and CMFB circuit and method for...

Details Combination trim and CMFB circuit and method for... Combination trim and CMFB circuit and method for...

2008-10-21

2010-06-08

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S009000, C330S253000

Reexamination Certificate

active

07733179

ABSTRACT:
A differential amplifier (10-1,2) includes an input stage (7) including first (M1) and second (M2) input transistors and first (4A) and second (4B) load devices. Sources of the first and second input transistors are connected together. Drains of the first and second input transistors are coupled by first (12) and second (13) conductors to the first and second load devices, respectively. Common mode feedback circuitry (6A) including first (M3), second (M4), and third (M5) transistors is combined with offset correction circuitry (8) including the second transistor and the third transistor. Sources of the first, second, and third transistors are coupled to a tail current source (11). Drains of the second and third transistors are coupled to the first and second conductors, respectively. A common mode voltage (VOCM) is applied to a gate of the first transistor. Offset trim voltages are applied to gates of the second and third transistors.

REFERENCES:
patent: 5936469 (1999-08-01), Alexander et al.
patent: 6278321 (2001-08-01), Franck
patent: 6798293 (2004-09-01), Casper et al.
patent: 7389097 (2008-06-01), Tamura
patent: 7489186 (2009-02-01), Segarra
patent: 7592867 (2009-09-01), Trifonov et al.
“Fully Differential Operational Amplifiers with Accurate Output Balancing” by M. Banu, J. Khoury and Y. Tsividis, IEEE Journal of Solid-State Circuits, vol. 23, No. 6, Dec. 1988, pp. 1410-1414.

Affiliated with

Also associated with

Rating

Combination trim and CMFB circuit and method for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4177298