| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure the power source switching time of a real system without being affected by the characteristics of a switch or signal propagation delay between devices. SOLUTION: Power supply voltage detection signals "Va", "Vb" and "Vn" to be respectively output from transformers 5a, 5b and 6 are fetched by a measurement device 8, and sampling hold processing, A/D conversion processing, data storage processing, difference voltage amplitude value arithmetic processing, difference voltage data storage processing, product variation arithmetic processing, comparison decision processing, and power supply switching time arithmetic processing are executed so that it is possible to measure a power supply switching time(excess duration). COPYRIGHT: (C)2008,JPO&INPIT
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