Amplifiers – With semiconductor amplifying device – Including plural stages cascaded
Reexamination Certificate
2006-08-30
2008-11-04
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including plural stages cascaded
C330S301000, C330S135000, C330S165000, C330S188000
Reexamination Certificate
active
07446613
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.
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Dupuis Timothy J.
Paul Susanne A.
Westwick Alan L.
Black Sand Technologies, Inc.
Johnson & Associates
Nguyen Patricia
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