Compensation for differences in gain among amplifiers

Details Compensation for differences in gain among amplifiers Compensation for differences in gain among amplifiers

1984-03-26

1985-04-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

330 2, H03G 320, G01R 1912

Patent

active

045118558

ABSTRACT:
A method and apparatus for measuring the small signal gain of an amplifier. Each amplifier responds, in operation, to a small signal input. The small signal input varies substantially linearly over a field time interval. A small bias signal is added to the bias level input of the amplifier during a portion of the field time interval. The output of the amplifier is measured at three or more different times during the field time interval, at least one time when the small bias signal has not been added to the bias level input and at least one time being when the small bias signal has been added to the bias level input. By processing the measured outputs, a signal which is directly proportional to the product of the small bias signal with the small signal gain of the amplifier is obtained. A method and apparatus for actively compensating for differences in the small signal gain among two or more amplifiers is obtained by dividing the small signal output of each amplifier by the signal proportional to the small signal gain of the amplifier.

REFERENCES:
patent: 4109213 (1978-08-01), Holley et al.
Carlson, A. et al., "A Solid-State Pyroelectric Imaging System" Proc. SPIE, vol. 207 Staring Infrared Focal Plane Technology (1981).

Affiliated with

Also associated with

Rating

Compensation for differences in gain among amplifiers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compensation for differences in gain among amplifiers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation for differences in gain among amplifiers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1458860