Charge injection and drain-based electrical overstress (EOS) protection apparatus and method

摘要

An electrical overstress (EOS) protection circuit that at least partially neutralizes or compensates for undershoot and overshoot in first and second signals that are communicated using differential signaling, such as with USB communications. For an undershoot, the EOS protection circuit injects charge into pads that receive the first and second signals. For an overshoot, the EOS protection circuit drains charge from the pad that receives the second signal and injects charge into the pad that receives the first signal.

主权项

1. An apparatus, comprising:
an electrical overstress (EOS) protection circuit configured to inject charge in response to an undershoot of first and second signals, and configured to drain charge in response to an overshoot of at least one of the first and second signals.