Attenuator circuit ultrasonic testing

Details Attenuator circuit ultrasonic testing Attenuator circuit ultrasonic testing

1976-07-26

1977-09-20

Farley, Richard A.

Communications: electrical

Selective

73 678R, G01S 966

Patent

active

040500551

ABSTRACT:
A broad bandwidth, constant input impedance programmable attenuator circuit for use in pulse-echo ultrasonic testing is provided for attenuating an acoustic discontinuity responsive electrical signal. The attenuator circuit is programmable either by computer or manually and comprises solid state components, specifically a constant current source and unidirectional current conducting devices. The attenuator circuit exhibits both constant input impedance over a wide range of operating frequencies and immunity from varying output load conditions.

REFERENCES:
patent: 3553636 (1971-01-01), Baird
patent: 3738159 (1973-06-01), Donnadieu

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