| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low distortion, low noise and compact transmission amplifier. <P>SOLUTION: At least one stage of amplifiers connected in multiple stages comprises an amplifier having a resistance 9 connected between a collector electrode and a base electrode of a bipolar transistor 3, and supplying an input bias from an output power supply 10 to the base electrode of the bipolar transistor 3 via an inductor 8 and the resistance 9. The resistance 9 and the output power supply 10 determine the input bias determining an operating condition of the bipolar transistor 3 to eliminate the superimposition of a distortion by a bias circuit on the bipolar transistor 3, which implements a low noise transmission amplifier. An inductor dedicated to supplying an input bias is dispensed with, which implements a compact transmission amplifier. <P>COPYRIGHT: (C)2013,JPO&INPIT |
