| 摘要 |
The appts. for measuring power in a circuit comprises a pulse width modulator including an integrator. A comparator having hysteresis characteristic is connected to the output side of the integrator. A feedback circuit feeds the output of the comparator back to the input side of the integrator. The voltage of the power circuit is applied to the input of the integrator of the modulator so as to be pulse width modulated. The current of the power circuit is applied to an analog switch.
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