Amplitude and phase programmable acoustic surface wave matched f

Details Amplitude and phase programmable acoustic surface wave matched f Amplitude and phase programmable acoustic surface wave matched f

1976-05-27

1977-12-27

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

307304, 310313, 310366, 333 30R, 333 70T, 357 26, 357 41, H03H 926, H03H 930, H01L 2984, H01L 2710

Patent

active

040657361

ABSTRACT:
A monolithic, amplitude and phase programmable matched filter device capable of generating and detecting biphase coded, pseudo random waveforms. Surface wave and metal oxide semiconductor (MOS) technologies are combined to develop an integrated filter structure having either a read only memory (ROM) or a digital shift register controlled thirty one-bit-silicon-MOSFET biphase tap structure. The use of silicon MOSFETs are piezoresistive surface wave detectors and the ROM structure provide the capability for generating and correlating 31-bit pseudo random (PN) sequences at a carrier frequency of 100 megaHertz. A 62 stage bucket brigade device array is utilized for controlling the amplitudes of the contiguous signal generation by random selection of codes from the 6.times.31 bit are at ROM.

REFERENCES:
patent: 3809923 (1974-05-01), Esser
patent: 4005318 (1977-01-01), Claiborne, Jr.
Grant, et al.--"Conference 1973 International Electron Devices Meeting Technical Digest, Washington, D.C., Dec. 1973," Title page, pp. 236-239.
Ph. Defranould-"MOSFET Surface Wave Detectors for High Frequency Signal Processing," 1973, European Microwave Conference, vol. II, Brussels, Belgium, Sept. 1973, 4 pages.
Claiborne et al.-"MOSFET Ultrasonic Surface Wave Detectors for Programmable Matched Filters," APL vol. 19, No. 3, Aug. 1, 1971, pp. 58-60.

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