| 摘要 |
A power cutoff device is provided to adjust the transient characteristics of a power voltage caused at a cutoff of the power voltage. The power cutoff device is provided between power lines, which supply constant voltages generated at a multi-power circuit to a plurality of load circuits respectively as power voltages, and ground lines. The power cutoff device detects, by means of an error detection unit, a change in the power voltage in the transient state caused at a cutoff of the power voltages, and outputs an error detection signal. Further, variable current sink units respectively connected to the power lines set their respective sink currents equivalent to values of the level of the error detection signal amplified by their respective coefficients. Then, by independently sinking currents from the power lines to the ground lines according to the sink currents, respectively, it is possible to adjust attenuation factors of the power voltages in the transient state, a time necessary to reach the level of the ground line for each, etc. |
