Gamma voltage generation circuit
US7973690B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 2010 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Jan 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/765
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A gamma voltage generation circuit is provided. An offset voltage generator generates a first offset voltage by dividing a voltage difference between a first input voltage and a second input voltage based on a first code. A first voltage shifting circuit of a voltage level shifter shifts down a first reference voltage by the first offset voltage to output a first level-shifted voltage. A second voltage shifting circuit of the voltage level shifter shifts down a second reference voltage by the first offset voltage to output a second level-shifted voltage. Each of resistors of a resistor string outputs one of the gamma voltages. A first end and a second end of the resistor string are respectively coupled to a first output terminal and a second output terminal of the voltage level shifter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.