Lucent Technologies Inc.

Wei Tang

Ashraf W Lotfi

Allen Frank Rozman

Jian Tan

An integrated circuit including a metal-semiconductor field-effect transistor (MESFET) having a nominal intrinsic capacitance and requiring a negative voltage to bias the MESFET into a non-conduction state, a method of driving the MESFET and a power converter employing the integrated circuit and method. In one embodiment, the integrated circuit includes a driver including a bias capacitor integrated with the MESFET. The driver is configured to apply a positive voltage to bias the MESFET into a conduction state, and apply the negative voltage to bias the MESFET into the non-conduction state without employing an external negative bias source.

Integrated circuit including a driver for a metal-semiconductor field-effect transistor

For use with a multiple output power converter, a secondary side post regulator (SSPR), a method of secondary side post regulating a multiple output power converter and a multiple output multiple output power converter employing the SSPR or the method. In one embodiment, the SSPR includes: (1) an average input current sensing circuit that senses a current flowing through a switch to be controlled in the multiple output power converter and develops therefrom an intermediate signal that is a function of an average of the current and (2) an input voltage feedforward circuit, coupled between an input of the multiple output power converter and the average input current sensing circuit, that adjusts the intermediate signal based on an input voltage of the multiple output power converter to develop a control signal that is a function of both the input voltage and the average of the current thereby to allow trailing edge control to be employed to control an output of said multiple output power converter.

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Plano, TX, United States of America

Wei Tang