Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1978-01-16
1980-01-15
Robinson, Thomas A.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
179 2EB, 325 39, 333193, H04J 312, H03H 730
Patent
active
041840526
ABSTRACT:
A device for sample modulating electronic information signals which includes mixing circuitry having a first input coupled to receive information signals, a second input for receiving electrical sampling signals, and an output for generating thereon electrical output signals proportional to the product of the information signals and the sampling signals. Also included is an acoustic surface wave device having an impulse response of predetermined shape and finite length. The surface wave device has an output coupled to the second input of the mixing circuit for generating thereon the sampling signals. These signals are proportional to the finite impulse response of predetermined shape, and accordingly have a highly controllable frequency spectrum.
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"Principles of Communication Engineering", J. Wozencraft & I. Jacobs, (Wiley: New York) 1965, p. 597.
"Surface-Acoustic-Wave Devices for Signal Processing App.", J. Maines et al., Proc. IEEE, vol. 64, No. 5, May, 1976, p. 639f.
"Practical Surface Acoustic Wave Devices", M. Holland et al., Proc. IEEE, vol. 62, No. 5, May 1974, pp. 582-610.
37 Ultrasonic Transducers, 3--Surface Wave Transducers", J. deKlerk, Ultrasonics, Jan. 1971, pp. 35-48.
Hartmann Clinton S.
Norris Jerry L.
Donaldson Richard L.
Hiller William E.
Robinson Thomas A.
Sharp Melvin
Texas Instruments Incorporated
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