PARASITIC ISOLATION COMMUNICATION SWITCH

摘要

This document discusses, among other things, a switch multiplexer having a common connector, the switch multiplexer including a first switch configured to receive a first signal at or above a ground (GND) reference and a second switch configured to receive a second signal that swings positive and negative about ground. The switch multiplexer includes a negative charge pump configured to bias the first switch with a negative charge pump voltage lower than the most negative voltage swing of the second signal when the second switch is enabled, and to bias the first switch with GND when the first switch is enabled.

主权项

1. A system comprising:
a switch multiplexer (MUX) having a common connector, the switch MUX including:
a first switch configured to receive a first signal, wherein the first signal is at or above a ground (GND) reference; anda second switch configured to receive a second signal, wherein the second signal swings positive and negative about GND; a negative charge pump configured to bias the first switch with a negative charge pump voltage lower than the most negative voltage of the second signal when the second switch is enabled, and to bias the first switch with GND when the first switch is enabled.