Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1979-11-23
1981-07-28
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
310314, 310365, 332 2, 333 1, 333133, H03H 900, H03H 913, H04R 1700, H01L 4104
Patent
active
042812992
ABSTRACT:
A signal isolator has an acoustic transmitting medium with a first pair of acoustic transducers thereon for transmitting an input signal through the medium at a first frequency. A first transmitting and receiving circuit is used in combination with the first pair of transducers. A second pair of transducers is located on the acoustic medium to transmit a power supply signal through the medium at a second frequency. Power supply means associated with the power supply signals are used to energize the transmitting and receiving means on opposite sides of the medium.
REFERENCES:
patent: 3483476 (1969-12-01), Kobayashi et al.
patent: 3548306 (1970-12-01), Whitehouse
patent: 3848144 (1974-11-01), Schissler
Peterson-"Acoustics, Fiber Optics Up Isolation Voltages", EDN, Nov. 20, 1978; pp. 66-67.
Burton Lockwood D.
Halista Mitchell J.
Honeywell Inc.
Marhoefer Laurence J.
Nussbaum Marvin L.
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