Fast digital phase detection or frequency discrimination using surface acoustic waves

Robert B. Ward

doi:10.1117/12.21295

1 September 1990 Fast digital phase detection or frequency discrimination using surface acoustic waves

Robert B. Ward

Proceedings Volume 1297, Hybrid Image and Signal Processing II; (1990) https://doi.org/10.1117/12.21295
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

In the present device, which consists of a SAW sensor and a specialized IC processor, the former generates a set of voltages whose pattern represents the delay or phase difference of the input signals, while the latter produces a parallel digital readout of delays or phases on the bases of voltage comparisons and unclocked logic operations. If equipped with a delay on one input branch, this SAW sensor can measure frequency using the same processor. Six- and seven-bit devices are envisioned with response times of the order of 100 nsec.

Citation Download Citation

Robert B. Ward "Fast digital phase detection or frequency discrimination using surface acoustic waves", Proc. SPIE 1297, Hybrid Image and Signal Processing II, (1 September 1990); https://doi.org/10.1117/12.21295

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