Power amplifier modules including bipolar transistor with grading and related systems, devices, and methods
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United States of America Patent
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Dec 13, 2016
Grant Date -
Nov 12, 2015
app pub date -
Apr 14, 2015
filing date -
Apr 14, 2015
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Abstract
One aspect of this disclosure is a power amplifier module that includes a first die including a power amplifier and a passive component, the power amplifier including a bipolar transistor having a collector, a base abutting the collector, and an emitter, the collector having a doping concentration of at least about 3×1016 cm−3 at an interface with the base, the collector also having a grading in which doping concentration increases away from the base; and a second die including a bias circuit configured to generate a bias signal based at least partly on an indication of an electrical property of the passive component of the first die and to provide the bias signal to the power amplifier. Other embodiments of the module are provided along with related methods and components thereof.
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