| 摘要 |
PROBLEM TO BE SOLVED: To provide a push-pull output circuit preventing oscillation of the output voltage. SOLUTION: In the output circuit provided with: a source side output transistor Q1; a sink side output transistor Q2; diodes D1, D2 for connecting base terminals of the transistors Q1, Q2; and a current control transistor Q3 whose collector terminal is connected to the base terminal of the sink side output transistor Q2 to control the base current of the source side and sink side output transistors Q1, Q2, the collector terminal and the base terminal of the current control transistor Q3 are connected via a capacitive element 6. Thus, when a potential of a loop path comprising the transistors Q1, Q2 and the diodes D1, D2 is fluctuated by a noise for oscillating the output voltage, the potential variation is transmitted to the base terminal of the current control transistor Q3 and the current control transistor Q3 can supply a collector current for canceling the potential variation. COPYRIGHT: (C)2007,JPO&INPIT
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