Switched capacitor circuit and stage circuit for AD converter
US8629797B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 2012 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Jul 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/168
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switched capacitor circuit, which is operable in two or more kinds of operation modes including a first and second operation modes, includes an amplifier and two or more internal capacitors with switches for controlling connection/disconnection of the capacitor. In the first operation mode that precedes the second operation mode, the switched capacitor circuit generates the first analog output voltage by using the first internal capacitor connected between an input terminal and output terminal of the amplifier by using its switches, the other internal capacitances connected between an input terminal of the amplifier and each analog input voltage supply by using its switches. In the second operation mode, the switched capacitor circuit generates the second analog output voltage with larger feedback factor of the amplifier than it in the first operation mode, by removing some of the internal capacitors, except the first internal capacitor, from the first operation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.