Patent ID: 8466722
Filing Date: 2013-06-18
Classification: H01L

Abstract:
1. A method for startup and operation of an output stage of a transmitter, the output stage comprising a first protection field effect transistor (FET) and a second protection FET, the method comprising: enabling a startup circuit; providing a first bias voltage to the first protection FET in the output stage and a second bias voltage to the second protection FET in the output stage by the startup circuit; disabling the startup circuit and enabling a protection voltage generator; providing the first bias voltage to the first protection FET in the output stage by the protection voltage generator; and providing the second bias voltage to the second protection FET in the output stage by a second bias voltage power supply; wherein disabling the startup circuit and enabling the protection voltage generator comprises transitioning an enable signal from low to high, the enable signal being connected to both the startup circuit and the protection voltage generator, and further comprising differential clock connected to the protection voltage generator, wherein the differential clock is configured to turn on in the event the enable signal transitions from low to high.