Low voltage operational amplifier and method

Details Low voltage operational amplifier and method Low voltage operational amplifier and method

1996-03-19

1997-12-16

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330300, H03F 345, H03F 326, H03F 316

Patent

active

056990154

ABSTRACT:
Low voltage operational amplifier (10) operates in a voltage range of one to eight volts over a temperature range of 0.degree. to 70.degree. centigrade. Op amp input stage (12) uses N-channel depletion-mode MOSFETs to provide amplification of the differential input and maintain constant transconductance. Source follower MOSFET (13) provides unity gain in transferring the AC signal, STAGE-1 OUTPUT, to the base of current sinking transistor (18). Sink control circuit (14) and source control circuit (22) generate the base drive currents for transistors (18) and (24). The signal at the output of MOSFET (13) either causes the sink transistor (18) to sink current or the signal to be transposed by means of a translinear loop (16) and causes the source transistor (24) to source current.

REFERENCES:
patent: 4379267 (1983-04-01), Young
patent: 5212455 (1993-05-01), Pernici et al.
patent: 5285170 (1994-02-01), Stockstad et al.
National Semiconductor Corp., "LMC6482 CMOS Dual Rail-To-Rail Input and Output Operational Amplifier", Apr. 1993, pp. 1-20 (whole pamphlet).
Frank Goodenough, Electronic Design, "Rail-To-Rail OP Amps Use Depletion-Mode PMOSFETs", Apr. 16, 1992, pp. 127-129.

Affiliated with

Also associated with

Rating

Low voltage operational amplifier and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-210747