| 摘要 |
An output circuit built in a semiconductor integrated circuit having an output terminal comprises a first transistor having a base and a collector connected to the output terminal, a second transistor having a collector connected to a power source circuit, an input signal source connected to the emitters of the first and second transistors, and a DC amplifier circuit having an input end connected to the output terminal and an output end connected to the base of the second transistor, and operated according to a preset bias potential. A signal occurring at the output terminal is fed back to the base of the second transistor via the DC amplifier circuit.
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