A/D conversion device provided with a gain calibration arrangement
US6069577A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1998 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Mar 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/167
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An A/D conversion device includes: PA1 an amplifier AMP receiving an input voltage V1 and supplying an output voltage V2, and PA1 an A/D converter ADC2 intended to convert the output voltage V2 of the amplifier AMP into a digital signal by comparing it with reference voltages generated by a resistance ladder R2 traversed by a bias current. The device includes a multiplexer MUX for setting the input of the amplifier AMP at a reference potential when a calibration signal CALG is active, and a calibration arrangement DECM which compares the output of the second converter ADC2 with a predetermined binary word, supplies a control signal GC, which depends on the result of said comparison and determines the value of the bias current, and stores the control signal GC when the calibration signal CALG is inactive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.