Accession Number : AD0703840

Title :   A SIMPLE HIGH-PERFORMANCE FEEDBACK MODULATION SYSTEM.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Gilson,Russell A.

Report Date : JAN 1970

Pagination or Media Count : 22

Abstract : A low-level AM modulation system suitable for broadband operation is described in this report. The system, which can be peripherally added to an existing power amplifier, employs feedback to reduce envelope distortion. Gain leveling over a broadband of frequencies is achieved, and the output of the system, being controlled by a reference voltage, is desensitized to changes in RF excitation. Test results taken on a system built for 225 - 400 MHz operation are given. The essential characteristics of the components used in the design are briefly described. Overall, the system was capable of producing modulation percentages of up to 85% with resulting envelope distortion of less than 5%. (Author)

Descriptors :   (*MODULATORS, FEEDBACK AMPLIFIERS), POWER AMPLIFIERS, TRANSISTOR AMPLIFIERS, AMPLITUDE MODULATION, RADIO TRANSMITTERS, BROADBAND

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE