Ultrasonic transmitter

Details Ultrasonic transmitter Ultrasonic transmitter

A - Human Necessities

61

B

349/36

A61B 8/00 (2006.01) G01S 15/00 (2006.01) G10K 11/34 (2006.01)

Patent

CA 1200886

PHN.10.264 15 5.11.82 ABSTRACT "Ultrasonic transmitter" 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) being 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.

420802

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