Duplexer including a variable capacitance diode for an ultrasoun

Details Duplexer including a variable capacitance diode for an ultrasoun Duplexer including a variable capacitance diode for an ultrasoun

1995-04-20

1997-03-11

Jaworski, Francis

Surgery

Truss

Pad

A61B 800

Patent

active

056091540

ABSTRACT:
A duplexer for an ultrasound imaging-system 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, contains a variable capacitance diode which is connected in a direction opposite that of transmit pulses emitted by the transmitter between the transducer element and the receiver. 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.

REFERENCES:
patent: 3705363 (1972-12-01), Okada et al.
patent: 4047112 (1977-09-01), Sakamoto
patent: 5027821 (1991-07-01), Hirama et al.
patent: 5318034 (1994-06-01), Ishida et al.
patent: 5394750 (1995-03-01), Matzuk

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