Buffer capable of controlling slew rate in drive IC
US7295054B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2004 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Nov 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45248
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates generally to a buffer of a drive Integrated Circuit (IC) and, more particularly, to a buffer of a drive IC for driving a spatial light modulator that can meet a desired dynamic slew rate characteristic by controlling current that affects a slew rate. The buffer capable of controlling the slew rate includes a first amplifier connected to the output terminal of the Digital/Analog (D/A) converter of an IC, and adapted to receive output voltage of the D/A converter and inversely amplify the output voltage, a second amplifier adapted to again inversely amplify output voltage that has been inversely amplified by the first amplifier, a charging means connected to the output and input terminals of the second amplifier, and adapted to be charged with the output voltage of the first amplifier, and a current control unit connected to the output terminal of the first amplifier and the input terminal of the second amplifier, and adapted to control the output voltage of the current control unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.