Accession Number : AD0164414

Title :   Logarithmic IF Amplifier.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Hamburg,Douglas R.

Report Date : 06 MAR 1973

Pagination or Media Count : 6

Abstract : The patent describes a logarithmic IF amplifier which is a synchronously tuned multi-stage cascaded transistor amplifier. Each amplifier stage includes an emitter follower and is loaded with modified complementary filter. This type of loading ensures a substantially purely resistive IF load driving point impedance and prevents change of the logarithmic characteristic at high input signal levels. The present invention also comprehends the use of series resistors in the base bias network to compensate for changes in gain resulting from decreased collector voltage during conditions of high signal level.

Descriptors :   *Logarithmic amplifiers, *Intermediate frequency amplifiers, *Patents, Transistor amplifiers, Radar, Homing devices

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE