Output circuit, digital/analog circuit and display apparatus
US7369075B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2005 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Dec 15, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/76
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output circuit, a digital/analog conversion circuit and a display apparatus can reduce the number of required input voltages and the number of transistors to save the necessary area. The output circuit and the digital/analog conversion circuit comprise a selection circuit for receiving as input a plurality of (m) reference voltages having mutually different respective voltage values, selecting two of the voltages according to a selection signal and outputting them and an amplifier circuit for receiving as input the voltages output from the selection circuit at two input terminals T1, T2 and outputting the voltage obtained by interpolating the voltage difference of the two input terminal voltages V(T1), V(T2) to a predetermined ratio. It may alternatively be so arranged that the selection circuit sequentially outputs the selected two voltages and the amplifier circuit sequentially receives as two input the two voltages and outputs the output voltage obtained by interpolation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.