| 摘要 |
PURPOSE:To attain DC amplification with higher sensitivity by connecting directly one stage of a semiconductor poled oppositely to the pre-stage of a two-stage direct couple amplifier circuit. CONSTITUTION:To the pre-stage of the two-stage directly coupled amplifier circuit comprising semiconductors 2, 3, the base of the semiconductor 7 poled oppositely is connected to the input, the collector is connected to the base of the semiconductor 2, and the emitter is connected to connectors of the semiconductors 2, 3 connected in series. In connecting semiconductors as three- stage directly in this way, DC amplification with higher sensitivity is attained.
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