| 摘要 |
PCT No. PCT/JP90/01253 Sec. 371 Date May 21, 1991 Sec. 102(e) Date May 21, 1991 PCT Filed Sep. 28, 1990.A current-detecting circuit detects the value of a current which flows out of an output circuit incorporated in an integrated circuit. A current-detecting resistor (17) is located at an intermediate point of the path along which the current flows out of the output circuit. The emitters of two NPN transistors (15, 16), for which a collector area ratio of N:1 is determined, are connected to the ends of the resistor (17), respectively. The bases of the NPN transistors (15, 16) are connected together, and the base and collector of one (15) of the NPN transistors are connected together. A current mirror circuit (14), which is made up of two PNP transistors (12, 13) and for which an input-to-output current ratio of M:1 determined, is connected to the collectors of the NPN transistors (15, 16). The base of an output NPN transistor (18) is connected to a node to which the collector of one (13) of the PNP transistors and the collector of one (16) of the NPN transistors are connected in common.
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