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Heterojunction bipolar transistor , method of manufacturing a power amplifier , and heterojunction bipolar transistor using this
Heterojunction bipolar transistor , method of manufacturing a power amplifier , and heterojunction bipolar transistor using this
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机译:异质结双极晶体管,功率放大器的制造方法以及使用该异质结双极晶体管的异质结双极晶体管
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摘要
PROBLEM TO BE SOLVED: To combine prevention of thermorunaway and prevention of degradation in power amplifier characteristics at high temperature.;SOLUTION: A heterojunction bipolar transistor 100 comprises a ballast resistance layer 7. The ballast resistance layer 7 comprises: an AlGaAs emitter ballast resistance layer 7a having a positive resistivity temperature coefficient in a first temperature range (room temperature-100°C) and a second temperature range (100°C or more); and an AlGaAs emitter ballast resistance layer 7b having a positive resistivity temperature coefficient in the second temperature range.;COPYRIGHT: (C)2014,JPO&INPIT
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