CPC G01R 29/0273 (2013.01) | 19 Claims |
1. A device of measuring duty cycles comprising:
a resistor-capacitor circuit configured to generate a first voltage when a reference signal is in a first state, and generate a second voltage and a third voltage when the reference signal is in a second state, the resistor-capacitor circuit comprising:
a first resistor-capacitor sub-circuit and
a second resistor-capacitor sub-circuit, wherein the first resistor-capacitor sub-circuit and the second resistor-capacitor sub-circuit operate simultaneously to compute an ON time; and
a control circuit coupled to the first resistor-capacitor sub-circuit and the second resistor-capacitor sub-circuit to acquire the ON time according to the first voltage, the second voltage and the third voltage, wherein the ON time is approximately equal to a time of the reference signal being in the first state.
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