| 摘要 |
<p>A power-on reset circuit provides an automatic reset pulse immediately after power-up. The supply voltage is provided to the reset circuit. An RC filter (90) with a variable time constant provides a "hump" waveform which is coupled to a waveform shaper (91). The waveform shaper converts the hump voltage output from the RC filter into a reset signal. Latching mechanisms (92) are included to prevent refiring of the reset signal.</p> |
