| 摘要 |
PURPOSE:To prevent malfunction with a very simple circuit by coupling an disconnecting circuit of a power supply having an error corresponding to a reset signal in interlocking with ON/OFF state of driven power supply. CONSTITUTION:An disconnecting circuit 2 is inserted on the way of an error side power terminal +Vcc at input/output in drive power supply terminals +Vcc, -Vcc of a data input/output circuit 1. In applying driving power supply till the circuit is made stable, an inverted reset signal is supplied, the disconnecting circuit 2 is operated and no +Vcc is applied to the data input/ output circuit 1. When the circuit is made stable and no reset signal exists, the circuit 2 is turned on and the +Vcc is supplied to the data input/output circuit 1. Thus, the circuit starts from 0V and not from a positive voltage. The inverted reset signal is supplied also at the time of turning off the driving power supply, the circuit 2 is operated, the +Vcc is shut off and the circuit does not rise up to the positive value.
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