Accession Number : AD0164279
Title : Narrow Band Intermediate Frequency Amplifier.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Burgess,Kenneth
Report Date : 15 JUN 1971
Pagination or Media Count : 5
Abstract : The patent describes a narrow band intermediate frequency (IF) amplifier having three stages coupled by double-tuned filters. Each stage includes a semiconductor amplifying element that is biased and loaded to give a slightly negative output resistance with a voltage protective diode in each stage. The protective diode in the last stage is a hot-carrier diode to provide low intermodulation distortion at high input signal levels between stages thereby producing output IF of narrow three decibels (db.) bandwidth for frequency modulation (FM) circuits.
Descriptors : *Intermediate frequency amplifiers, *Patents, Narrowband, Transistor amplifiers, Coupling circuits, Electric filters, Electrical networks, Tuning devices
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE