Level shifter
US6731273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Oct 29, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0291
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A level shifter that accommodates lower driving voltage of a driver circuit and has a sufficient capability of converting the amplitude of an input signal even when the voltage amplitude of the input signal is low is provided. A level shifter utilizing a current mirror circuit 150 and a differential circuit 160 is used in a portion for converting the voltage amplitude of the signal. Since the potential difference of a signal input through transistors 105 and 106 to the differential circuit 120 is amplified and outputted, the voltage amplitude can be normally converted without influence of the threshold of a transistor even when the voltage amplitude of the input signal is low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.