| 摘要 |
<p>PURPOSE:To supply a power on reset device which can generate a stable pulse by correcting the variance of thresholds owing to manufacture processes. CONSTITUTION:The respective sources of two P-channel transistors are connected to a power source. The gate of the first P-channel transistor P1 is connected with ground and its drain is connected to ground by way of a node 1 and a capacitance C1. The source of the second P-channel transistor P2 is connected with the node 1 and its drain is connected with ground as output by way of a resistance R1.</p> |
