Bias current control for operational amplifier current/voltage c

Details Bias current control for operational amplifier current/voltage c Bias current control for operational amplifier current/voltage c

1991-11-04

1992-10-20

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including temperature compensation means

357 87, 307310, H03F 130

Patent

active

051573520

ABSTRACT:
A Peltier cooling system for solid-state operational amplifiers reduces the bias current and allows the amplifier to perform at a level previously attained only by vacuum tube operational amplifiers. The amplifier is cooled with a Peltier junction substantially below the ambient to control the temperature very closely to a fixed value. A solid-state temperature detector is placed in thermal contact with the operational amplifier substrate. The sensor output, which is proportional to he absolute temperature of the operational amplifier, is fed to the temperature control circuitry. The control circuitry compares the sensor current with a temperature set point current, and the difference is used to control the cooler current.

REFERENCES:
patent: 2930904 (1960-03-01), Fritts
patent: 4370615 (1983-01-01), Whistler et al.
patent: 4685081 (1987-08-01), Richman
patent: 4689659 (1987-08-01), Watanabe
patent: 4727554 (1988-02-01), Watanabe
patent: 4883957 (1989-01-01), Kinge et al.
patent: 4935864 (1990-06-01), Schmidt et al.

Affiliated with

Also associated with

Rating

Bias current control for operational amplifier current/voltage c does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-194844