| 摘要 |
Amplifier was composed of an integrated cct. (1) having the 1st and 2nd transistor (2,3) in series, and an input signal supplier. The 3rd transistor base was connected to the connecting point of the two transistors(2,3), so that 1st and 3rd transistor comprised a push-pull amplifier. The 2nd transistor served only as a driver. Feedback ccts. (22,28) were formed, so that the control input signal was applied to the integrated cct.
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