| 摘要 |
PURPOSE:To obtain an output protective circuit capable of increasing a resistance value without scaling up transistor size by connecting unit circuits, in which MOSFETs and non-junction type resistors are connected in series, in parallel. CONSTITUTION:Unit circuits 5-1-5-N in which one ends of non-junction type resistors are connected in series with MOSFETs on the P channel sides of paired MOSFETs1 for outputs and unit circuits 6-1-6-M in which one ends of non-junction type resistors 4 are connected in series with MOSFETs3 on the N channel sides are each fitted in parallel, and the other ends of the non- junction type resistors 2, 4 and an output terminal 8 are connected by metallic wirings. According to such a constitution, the resistors having resistance values at N times can be inserted on the P channel side and those at M times on the N channel side, thus increasing protective capacity to separate MOSFET. |
