Accession Number : AD0164715

Title :   Acoustic Surface Wave Frequency Synthesizer.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Carr,Paul H.

Report Date : 14 JAN 1974

Pagination or Media Count : 12

Abstract : The patent application relates to frequency synthesis achieved by combining selected outputs from a multiplicity of acoustic surface wave filters. Each filter has a different filter pass frequency and in combination they define, in equal frequency increments, a given frequency. In a preferred embodiment the filters are fabricated as multiple parallel contiguous acoustic surface wave transmission channels on the propagating surface of a single piezoelectric substrate member. Input and output transducers are thinned interdigital electrodes with the output transducers being apodized in some instances. The filter outputs are fed to a switching matrix the output of which is controlled or coded by a number generator.

Descriptors :   *Frequency synthesizers, Patents, Surface waves, Acoustic waves, Ultrahigh frequency, Acoustic filters, Acoustic equipment

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE