Analog circuit for controlling acoustic transducer arrays

Patent · Mon Dec 31 23:00:00 EST 1990

OSTI ID:868021

Drumheller, Douglas S ^[1]

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1. Cedar Crest, NM

A simplified ananlog circuit is presented for controlling electromechanical transducer pairs in an acoustic telemetry system. The analog circuit of this invention comprises a single electrical resistor which replaces all of the digital components in a known digital circuit. In accordance with this invention, a first transducer in a transducer pair of array is driven in series with the resistor. The voltage drop across this resistor is then amplified and used to drive the second transducer. The voltage drop across the resistor is proportional and in phase with the current to the transducer. This current is approximately 90 degrees out of phase with the driving voltage to the transducer. This phase shift replaces the digital delay required by the digital control circuit of the prior art.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
• Assignee: Teleco Oilfield Services Inc. (Meriden, CT)
• Patent Number(s): US 5056067
• OSTI ID: 868021
• Country of Publication: United States
• Language: English

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