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US Patent 7446613 Power amplifier input structure having a differential output

Patent 7446613 was granted and assigned to Black Sand Technologies on November, 2008 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors

Is a

Patent

Patent attributes

Current Assignee

Black Sand Technologies

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7446613

Date of Patent

November 4, 2008

Patent Application Number

11468383

Date Filed

August 30, 2006

Patent Primary Examiner

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Patricia Nguyen

Patent abstract

A method and apparatus provides an input structure for a power amplifier. In one example, the input structure has an input network and a predriver circuit to provide an input signal to the power amplifier. The input network includes a transformer for helping to maintain a constant input impedance. The predriver includes a limiting amplifier that provides isolation between the power amplifier and the RF input. A DC feedback circuit is used by the predriver that maintains the DC level of the inverters to a desired level.