AC signal detector and the method thereof

US9201102B2 · kind B2 · utility

Assignee

• Chengdu Monolithic Power Systems Co., Ltd. · CN

Inventors

• Siran Wang · Hangzhou City, CN
• Yike Li · Chengdu, CN
• Kun Yi · Chengdu, CN
• Yuancheng Ren · Hangzhou City, CN
• Junming Zhang · Berlin, DE
• En Li · Lo Wu, CN

Key dates

• Filing date: Jun 28, 2013
• Grant date: Dec 1, 2015
• Expiry date: Jan 23, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/42
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An AC signal detector having: a rectify circuit having a first input terminal and a second input terminal configured to receive an AC signal, and an output terminal configured to provide a rectified signal based on the AC signal; a detecting circuit having an input terminal coupled to the output terminal of the rectify circuit to receive the rectified signal, and an output terminal configured to provide a square signal based on the rectified signal; and an unplug indicate circuit having an input terminal coupled to the detecting circuit to receive the square signal, and an output terminal configured to provide an unplug indicate signal based on the square signal.