Clamping circuit to a reference voltage for ultrasound applications

摘要

A clamping circuit includes a clamping core connected to an output terminal and having a central node connected to a voltage reference and at least one first and one second clamp transistor, connected to the central node and having respective control terminals, the clamping core being also connected at the input to a low voltage input driver block. The clamping core includes a first switching off transistor connected to the output terminal and to the first clamp transistor, as well as a second switching off transistor connected to the output terminal and to the second clamp transistor.

主权项

1. A high-voltage clamping device, comprising:
an output; an input configured to couple to a reference voltage; a first clamping transistor; a second clamping transistor; a first switching transistor coupled between the output and the first clamping transistor; and a second switching transistor coupled between the output and the second clamping transistor, wherein,
the first and second clamping transistors are high-voltage MOS transistors of complementary types;the first clamping transistor is coupled between the first switching transistor and the input, the first clamping transistor and the first switching transistor having body diodes coupled together in anti-series; andthe second clamping transistor is coupled between the second switching transistor and the input, the second clamping transistor and the second switching transistor having body diodes coupled together in anti-series.