| 摘要 |
PROBLEM TO BE SOLVED: To provide a transistor circuit capable of preventing the thermal runaway of a transistor and capable of largely reducing the power gains of unwanted harmonic components and an out-of-band signal components, while inhibiting lowering of the power gain of a desired frequency component by a base ballast resistor. SOLUTION: The transistor circuit 1 is composed of a plurality of transistor cells 10, constituted of the transistors 11, the base ballast resistors 12, capacitors 13, and inductors 14. Collectors and emitters for the transistors 11 are commonly connected at a collector terminal 1c and an emitter terminal 1e for the transistor circuit 1, respectively. In the base ballast resistors 12, one end of the resistor 11 connected to a base for the transistor 11 and the other end to a base terminal 1b for the transistor circuit 1. The capacitors 13 and the inductors 14 are connected in series and form series resonance circuits 15, and are connected among the bases for the transistors 11 and the base terminals 1b for the transistor circuit 1, in parallel with the base ballast resistors 12. COPYRIGHT: (C)2006,JPO&NCIPI
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