Ultrasonic transmitter

Details Ultrasonic transmitter Ultrasonic transmitter

1983-01-24

1984-07-03

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

73641, 73642, G01N 2904

Patent

active

044571771

ABSTRACT:
The transmitter comprises an array of electro-acoustic transducers (1), each of which is connected to an oscillator circuit (9) which has a start input (11). The start inputs (11) successively receive start signals from a start signal generator (13) which comprises a number of comparators (15), each of which comprises a first input (17) and a second input (19). The first inputs (17) are together connected to an output of a sawtooth generator (21), the second input (19) of each comparator (15) are connected to a direct voltage source (23). A direct voltage source (23) is provided for each start signal to be successively generated at least some of the direct voltage sources being controllable in common.

REFERENCES:
patent: 3166731 (1965-01-01), Joy
patent: 4180790 (1979-12-01), Thomas
patent: 4410910 (1983-10-01), Andes

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