Patent ID: 6268632
Filing Date: 2001-07-31
Classification: H01L

Abstract:
A power amplifier, comprising:a transistor, comprising:a source region;a drain region;a channel region interposed between the source region and the drain region; andat least a first gate electrode and a second gate electrode provided on the channel region, wherein:at least one of the first and second gate electrodes traverses substantially an entire width of the channel region, andat least another one of the first and second gate electrodes traverses a part of the width of the channel region;an input terminal for receiving a signal;an output terminal for outputting the signal;an input impedance-matching circuit connected between the input terminal and the first gate electrode;an output impedance-matching circuit connected between a drain electrode of the transistor and the output terminal;a first DC voltage circuit connected to the first gate electrode;a second DC voltage circuit connected to the second gate electrode; anda third DC voltage circuit connected to the drain electrode.