Communications – electrical: acoustic wave systems and devices – Echo systems
Patent
1993-04-30
1994-09-13
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Echo systems
367903, 333 32, G01S 1500
Patent
active
053474953
ABSTRACT:
A transformer used to connect an electro-acoustic transducer to a transmitter and a receiver in a pulse-echo ranging system has a first winding connected to the transducer, and second and third windings connected in parallel to the transmitter and the receiver. The second winding has back-to-back diodes in series with it, and the third winding has several times more turns than the second winding, so that with high amplitude signals, as during transmission, the diodes conduct and render the second winding effective. With low amplitude signals, as during reception, the diodes isolate the second winding and the third winding acts to provide a relative step-up of the amplitude of the received signals.
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Adams Andy
Cherek Bogdan
Nguyen Son C.
Lobo Ian J.
Milltronics Ltd.
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