Differential amplifier, digital-to-analog converter and display device
US7459967B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2006 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Jan 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/5039
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a multi-level output differential amplifier which includes a first differential pair; a second differential pair; a load circuit commonly connected to output pairs of the first and second differential pairs; first and second current sources for supplying current to the first and second differential pairs, respectively; an amplifier stage for receiving a common output signal of the first and second differential pairs and driving an output terminal by a charging or discharging operation; and a control circuit for controlling changeover of signal inputs to the first and second differential pairs. The data output period includes first and second time periods. In the first time period, a voltage at the output terminal and a reference voltage are applied to first and second differential inputs of the first differential pair; the output-terminal voltage and the reference voltage are stored in first and second capacitors, respectively, connected to the first and second differential inputs of the first differential pair; and first and second voltages are applied to first and second differential inputs of the second differential pair. In the second time period, the first and sec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.