Patent ID: 8749099

Claim:
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; and the 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.