Ultrasound imaging system with common-mode noise rejection probe

Details Ultrasound imaging system with common-mode noise rejection probe Ultrasound imaging system with common-mode noise rejection probe

1989-12-04

1991-01-15

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73625, G01N 2904

Patent

active

049844652

ABSTRACT:
An ultrasonic imaging system probe with an even-number of transducer elements, has a transformer for coupling the received signal from each transducer to an associated cable. The polling of the transformer primary windings are identical while the polling of the secondary windings of the transformer alternate, i.e. are reversed for all even-numbered channels, with respect to odd-numbered channels. All odd channel outputs are conected to a first signal bus, while all even channel outputs are connected to a second signal bus. The signal busses are connected to inputs of a differential-input amplifier, having an output which provides the sum of all channel transducer outputs, with suppression of any common-mode signal appearing in the system from the channel transformer secondary windings to the differential amplifier inputs.

REFERENCES:
patent: 4420978 (1983-12-01), Robinson et al.

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