Patent ID: 9178507
Filing Date: 2015-11-03
Classification: G01S,H03K

Abstract:
1. A transmit switch comprising: a first terminal; a second terminal; a first field effect transistor (FET) including a drain electrically connected to the first terminal, a gate electrically connected to a gate node, and a source electrically connected to a source node; a second FET including a drain electrically connected to the second terminal, a source electrically connected to the source node, and a gate electrically connected to the gate node; a bias circuit electrically connected between the gate node and the source node; and a bias polarity control circuit electrically connected between the gate node and the source node and configured to receive a control signal, wherein the bias polarity control circuit is configured to turn on the first and second FETs by generating a bias voltage across the bias circuit when the control signal indicates that the transmit switch should be enabled, and wherein the bias polarity control circuit is configured to turn off the first and second FETs by reversing a polarity of the bias voltage when the control signal indicates that the transmit switch should be disabled, wherein the bias circuit comprises a first Zener diode and a second Zener diode electrically connected in series between the gate node and the source node, wherein the first and second Zener diodes have opposite polarity.