Patent ID: 8648629

Claim:
A transmission channel, comprising: a clamp including: a clamp output; a clamp input configured to couple to a reference voltage; a first clamping transistor; a second clamping transistor; a first switching off transistor coupled between the output and the first clamping transistor; and a second switching off transistor of the clamp 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 off transistor and the input, the first clamping transistor and the first switching off transistor having body diodes coupled together in anti-series; and the second clamping transistor is coupled between the second switching off transistor and the input, the second clamping transistor and the second switching off transistor having body diodes coupled together in anti-series; and a reset block including: a first memory diode coupled to a conduction terminal of the first clamp transistor and configured to couple to a conduction terminal of a first transistor of a high-voltage buffer; and a second memory diode coupled to a conduction terminal of the second clamp transistor and configured to couple to a conduction terminal of a second transistor of the high-voltage buffer.