Accession Number:

ADD008485

Title:

Log-Exponential AGC Circuit.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1981-04-21

Pagination or Media Count:

8.0

Abstract:

An AGC circuit designed to have a response-time independent of the absolute background input level comprising a variable-gain amplifier, an envelope detector receiving an input from the variable-gain amplifier, a logarithmic amplifier to convert the envelope value to its logarithm, a summer to subtract this envelope from a reference and thus generate an error signal, an integrator to integrate the error signal, and an exponential converter to convert this signal to an exponential and apply it as a control signal to the variable-gain amplifier. Thus, a uniform echo pulse may be presented to a display regardless of the background level. Author

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE