Successive approximation analog-to-digital converter
US8564470B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/46
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current input analog-to-digital converter and a corresponding current measurement circuit is disclosed. In accordance with one example of the invention, an analog-to-digital conversion circuit includes a register for storing a digital register value and a digital-to-analog converter that is configured to provide a reference current at a circuit node which is set in accordance to the digital register value. The electric potential of the input node is responsive to the reference current set. A comparator circuit is configured to compare the potential of the circuit node with at least one threshold, thus assessing whether the potential of the circuit node is at least approximately at a desired value. Control circuitry is responsive to the comparator circuit and is configured to adjust the digital register value stored in the register and to adjust the reference current until the comparator indicates that the potential of the circuit node does not deviate from the desired value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.