Analog-digital converter with pipeline folding scheme
US6950051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2004 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Jun 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/141
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is a pipelined folding analog-digital converter, the pipelined folding analog-digital converter comprising: a first sample-and-hold unit that samples and outputs a number of analog input voltages; a reference voltage generator that generates a number of reference voltages; a pre-amplifier that amplifies and outputs a number of values subtracting each reference voltage from the outputs of the first sample-and-hold unit, wherein an offset effect due to asymmetry of the amplifier is eliminated; a first folder that folds and outputs a number of outputs of the pre-amplifier; a second sample-and-hold unit that samples and outputs a number of outputs of the first folder; a second folder that folds and outputs a number of outputs of the second sample-and-hold unit; and a comparator that performs a comparison operation between the outputs of the pre-amplifier and the output values of the second folder to find a digital output value, whereby the offset caused by the device mismatch is removed, so that it is possible to realize a high-resolution analog-digital converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.