Digital-analog converter capable of easily extending resolution
US7504978B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2007 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Nov 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/765
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is provided a digital-analog converter capable of easily extending the resolution that can easily extend the resolution by a simple circuit implementation when a 10-bit digital-analog converter is configured on the basis of an 8-bit digital-analog converter used in a display driving IC, and prevent an increase in area of the display driving IC. A digital-analog converter capable of easily extending the resolution according to an aspect of the invention includes a voltage dividing unit including a plurality of resistors connected in series with each other between operating voltage terminals to divide operating voltages into a plurality of voltages at connection nodes of the plurality of resistors, a decoder unit providing a plurality of switching signals including a first switching signal for selecting a voltage and a second switching signal for controlling the current, a switch unit selecting two voltages from the plurality of voltages divided by the voltage dividing unit according to the first switching signal, a comparing unit comparing the two voltages with each other selected by the switching unit to output a reference current corresponding to a difference between the two…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.