Method and apparatus for generating monopulse ultrasonic signals

Details Method and apparatus for generating monopulse ultrasonic signals Method and apparatus for generating monopulse ultrasonic signals

1982-09-24

1985-03-26

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Transmitter systems

310317, G10K 1100, G01S 752

Patent

active

045077622

ABSTRACT:
A method of transmitting half-sinewave ultrasonic monopulses utilizes a flip-flop (22) to reverse the states of a bridge circuit (Q.sub.1 -Q.sub.4) with each output pulse from a timing pulse generator (20). This reverses the polarity of a dc voltage which stresses a piezoelectric transducer (24) to substantially its limit. Each pulse from the timing generator thus causes one mechanical transition of the transducer and clamps it in its reversed stress condition, thereby producing a half-sinewave ultrasonic output for each timing pulse.

REFERENCES:
patent: 2651012 (1953-09-01), Van Valkenburg et al.
patent: 2778002 (1957-01-01), Howry
patent: 3715710 (1973-02-01), Bernstein et al.
patent: 4282452 (1981-08-01), Hassler et al.

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