Acoustic Surface Wave Frequency Synthesizer.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 14, 1974
- Accession Number
- AD0164715
Entities
People
- Paul H. Carr
Organizations
- United States Department of the Air Force