Patent ID: 9176172
Filing Date: 2015-11-03
Classification: G01R

Abstract:
1. A power level identification circuit with different modes corresponding to different power levels, the power level identification circuit comprising: a power interface, which receives electrical power and first signals indicating a level of the power; a voltage conversion unit, connected to the power interface, the voltage conversion unit receiving the power from the power interface and converting the power; a waveform detection unit, connected to the power interface, the waveform detection unit filtering the power and obtaining the first signals indicating power level; a signal pre-processing unit, connected to the waveform detection unit, the signal pre-processing unit shaping waveforms of the first signals indicating power level and thereby generating second signals indicating power level; and a processing unit, connected to the signal pre-processing unit, the processing unit identifying a level of the second signals indicating power level and switching to one of the modes of the power level identification circuit corresponding to the identified level of the second signals indicating power level.