アクティブ共振器の共振周波数について

概要

論文の詳細を見る
A UHF active resonator circuit which makes use of phase rotator action between emitter and base or the transistor is treated. The circuit is analyzed as a tuned negative-resistance amplifier. This approach is different from the conventional one in that the negative-resistance is adjusted to achieve amplification in our method, while in the conventional method it is confined just enough to compensate loss of the circuit.　The analysis is aimed at obtaining design procedures. The results were confirmed with experiments.　As the transistor circuit realizing negative resistance, both the base-input type and the conventional emitter-input type are used. Tuning conditions are attained by either series or parallel connection of the external reactance. In the case of the emitter-input type circuit, both the series and parallel connections were tried and the series connection was found to be more convenient in designing. For the base-input type more simplified equivalent circuit was assumed to obtain simpler design procedures. The results indicate that approximation is valid up to about a half of the α-cutoff frequency of the transistor.
山形大学の論文
1976-02-20