| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to greatly shorten the time for simulation required for the number of times of toggle for output of each logic gate, in a circuit where power consumption is to be measured. SOLUTION: In the toggle detecting circuit, one-bit registers 101 and 102 are provided and each signal for times t-1 and t-2 is retained for input 100 at a time 't'. '1' is outputted by a detector 103 only for variations of from 0 to 1 and from 1 to 0 at the time 't'. Signals obtained by a detector 102 is added by an accumulator 104. The number of toggles are retained by a register 105 for a number of bits, and a toggle detection circuit 106 and a power consumption measuring circuit are realized to a programmable array, test vector for simulation is inputted and the toggle number of times is obtained by referring the result of the resistor 105, after the simulation is finished.
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