Accession Number : AD0287483

Title :   DEMODULATION OF A SPECIAL AM-FM SIGNAL

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ENGINEERING EXPERIMENT STATION

Personal Author(s) : DEARHOLT,DONALD W.

Report Date : SEP 1960

Pagination or Media Count : 1

Abstract : AD-287 483Div. 8 U (TISTE/CAM) OTS price $7.60 New Mexico U. Engineering Experiment Station, Albuquerque. DEMODULATION OF A SPECIAL AM-FM SIGNAL, by Donald W. Dearholt. Sep 60, 64p. incl. illus. 5 refs. (Technical rept. no. EE-34) (Contract DA 29-040-ORD-1238) Unclassified report DESCRIPTORS: *Signal generators, *Transducers, *Detection, *Modulation, Radiofrequency, Radio signals, Amplitude modulation, Tuning circuits, Pulse discriminators, Pulse modulation, Elec tronic circuits, Mathematical analysis, Theory, ntegaion, Waveform generators. The problem of demodulation of a signal obtained from a special generator and a special class of transducers is considered. The swept frequency range of the generator is chosen so that the resonant frequency of the transducer ies within this range for all anticipated values of the parameter to be measured. The generator output is applied to the transducer so that an amplitude pek ocurs every time the generator frequency pses through the resonant frequency of the transducer. Demodulation is considered complete if correct relative values of the resonant frequency of the transducer are obained. Possible souces of error in the peak marking circuit are considered, and ways of minimizing different types of error are discussed. Results obtained from an experimentl peak mrking circuit are compred with theoretical reults. (Author)

Descriptors :   *DETECTION, *MODULATION, *SIGNAL GENERATORS, *TRANSDUCERS, AMPLITUDE MODULATION, CIRCUITS, NUMERICAL INTEGRATION, MATHEMATICAL ANALYSIS, PULSE DISCRIMINATORS, PULSE MODULATION, RADIO SIGNALS, RADIOFREQUENCY, THEORY, TUNING DEVICES, WAVEFORM GENERATORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE