ASAR ADC circuit and conversion method thereof

US9755659B2 · kind B2 · utility

Assignees

• Semiconductor Manufacturing International (Shanghai) Corporation · CN
• Semiconductor Manufacturing International (Beijing) Corporation · CN

Inventors

• Ben Peng Xun · Shanghai, CN
• Fei Liu · Wuxi, CN
• Meng Guo · Shanghai, CN
• Hua Tang · Shanghai, CN
• Haifeng Yang · Shanghai, CN

Key dates

• Filing date: Jan 17, 2017
• Grant date: Sep 5, 2017
• Expiry date: Jan 17, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/46
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

The present disclosure provides asynchronous successive approximation register analog-to-digital converter (ASAR ADC) circuits and signal conversion method thereof. An exemplary ASAR AC circuit includes a sample/hold circuit configured to input a first analog signal and output a second analog signal; a digital-to-analog converter circuit configured to output a third analog signal; a first voltage comparison circuit configured to respond to a valid level of a latch signal, and output a first logic level and a second logic level; a first logic circuit configured to respond to a valid level of a flag signal, and identify a comparison result of the first voltage comparison circuit and output the first digit signal; and a pulse generation circuit configured to generate the latch signal and the flag signal with a generation time of the valid levels independently from the first logic level and the second logic level.