Common mode transient suppression

A method, comprising:

• employing, in a signal isolator, a first die comprising a transmit module, wherein the first die has a first voltage domain;
• and
• employing a second die comprising a receive module including a receive amplifier configured to receive from the transmit module a transmit signal that includes a differential signal and a common mode current, wherein the second die has a second voltage domain, wherein the first and second die are separated by an isolation barrier, and wherein the receive amplifier comprises:
• a differential amplifier to receive the differential input signal from the transmit module;
• and
• a common mode module configured to sense the common mode current and sink or source the common mode current and minimize changes to an input impedance of the receive amplifier, wherein the common mode module comprises a class AB amplifier.

A signal isolator, comprising:

• a first die means for providing a transmit module and a first voltage domain;
• and
• a second die means for providing a receive module including a receive amplifier configured to receive from the transmit module a transmit signal that includes a differential signal and a common mode current, wherein the second die has a second voltage domain, wherein the first and second die are separated by an isolation barrier, and wherein the receive amplifier comprises:
• a differential amplifier means for receiving the differential input signal from the transmit module;
• and
• a common mode means for sensing the common mode current and sink or source the common mode current and minimizing changes to an input impedance of the receive amplifier, wherein the common mode means comprises a class AB amplifier.