Amplifiers – With semiconductor amplifying device – Including plural amplifier channels
Reexamination Certificate
2011-03-01
2011-03-01
Choe, Henry K (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including plural amplifier channels
C330S307000
Reexamination Certificate
active
07898338
ABSTRACT:
An integrated HF-amplifier has an input bond pad, cells displaced in a first direction, and an output bond pad. Each has a amplifier with input pad, active area, and output pad. The active area is arranged in-between the input and output pads, and the input pad, active area, and output pad are respectively displaced in a second direction substantially perpendicular to the first direction. A first network interconnects input pads of adjacent cells, and extends in the first direction. A second network interconnects output pads of adjacent cells, and extends in the first direction. The first and second networks obtain an output signal at the output bond pad having for all interconnected cells an equal phase shift and amplitude for a same input signal at the input bond pad. At particular bias and phase shift conditions this provides a Doherty amplifier with improved efficiency at power back off.
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Choe Henry K
NXP B.V.
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