Amplifiers – With amplifier bypass means
Reexamination Certificate
2006-09-12
2006-09-12
Nguyen, Patricia (Department: 2817)
Amplifiers
With amplifier bypass means
C330S296000, C330S302000
Reexamination Certificate
active
07106134
ABSTRACT:
An RF power amplifier having reduced memory effects is disclosed. This is achieved by a novel design of the DC supply feed network to achieve low impedance across video frequencies, whilst maintaining the correct RF output matching. One or more transmission zeros are provided in the bias circuit transfer function, which are positioned in the video bandwidth so as to provide low and relatively constant impedance across the video bandwidth. Also, a parallel DC feed line may be employed to reduce impedance across the video bandwidth. The reduction in memory effects allows improved performance of predistortion linearization techniques and an implementation in a feed forward amplifier employing predistortion linearization is also disclosed.
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Khanifar Ahmad
Maslennikov Nikolai
Spiller Gareth
Henty David L.
Myers Dawes Andras & Sherman LLP
Nguyen Patricia
Powerwave Technologies Inc.
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