| 摘要 |
<p>PURPOSE: To prevent the sudden change of an oscillating output when momentary interruptions are generated in operating power supplies. CONSTITUTION: In an electric circuit 30 for outputting a signal via a plurality of operational amplifiers, such a preventing circuit for suddenly changing outputs is provided that when inputting or interrupting operating power supplies, the feed or interruption of the operating power supply for an operational amplifier 13E in a final stage is performed at a later time than the ones for the operational amplifiers in preceding stages. This preventing circuit for suddenly changing outputs has a means 32G for so giving discrepancies among the drooping times of the operating power supplies that the drooping time of the operating power supply for the operational amplifier 13E in a final stage is made shorter than the ones for the operational amplifiers in preceding stages when interrupting the operating power supplies, a drooping sensing means 32H for sensing the drooping of the operating power supply for the operational amplifier 13E in a final stage while comparing it with a reference voltage and means 32L, 31 for holding an output forcedly which make the output of the electric circuit 30 zero potential only during a fixed term when sensing the drooping of the operating power supply for the operational amplifier 13E in a final stage.</p> |
