Duplexer including a field-effect transistor for use in an ultra

Details Duplexer including a field-effect transistor for use in an ultra Duplexer including a field-effect transistor for use in an ultra

1995-04-21

1997-02-18

Jaworski, Francis

Surgery

Truss

Pad

A61B 800

Patent

active

056033249

ABSTRACT:
A duplexer for an ultrasound imaging system is capable of selectively coupling a transducer element to either a transmitter or a receiver, depending on whether the imaging system is in the transmit mode or receive mode. The duplexer contains a field-effect transistor whose source and drain are connected between the transducer element and the receiver. The gate of the field effect transistor may either be driven with a control voltage or short-circuited to the source. In this manner, one obtains an improved duplexer that operates with virtually no power loss, without drive circuits, without leakage currents, and with low noise.

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Kenyon & Kenyon

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