| http://www.w3.org/ns/prov#value | - With reference to the second embodiment, the circuit shown in FIG. 8 is a circuit for producing the abovementioned signals and a signal ???7 for telling the duration from the end of the TOFF duration to the end of the next TON duration (that is, the duration from the TOFF end signal ???4 to the next TON duration ???6 ).
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