Integrated low-voltage transmit/receive switch for...

Details Integrated low-voltage transmit/receive switch for... Integrated low-voltage transmit/receive switch for...

2008-01-01

2008-01-01

Jaworski, Francis J. (Department: 3768)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C310S317000

Reexamination Certificate

active

07314445

ABSTRACT:
A low-voltage transmit/receive switch that acts to protect sensitive low-voltage electronics from high-voltage pulse signals used to drive an ultrasonic transducer. The low-voltage transmit/receive switch comprises a series resistor and a parallel MOSFET pair. The parallel MOSFETs are low-voltage devices. The low-voltage transmit/receive switch is placed between the output of a high-voltage pulser and the input of a receive pre-amplifier. If dual high- and low-voltage pulsers are used, then the low-voltage pulser is connected so that it is also protected from the high-voltage pulse signals by the low-voltage transmit/receive switch. In an alternative embodiment, the low-voltage pulser and the receive pre-amplifier are protected from the high-voltage pulse signals by a high-voltage transmit/receive switch.

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patent: 6856175 (2005-02-01), Wodnicki
patent: 6956426 (2005-10-01), Wodnicki

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