Level shifter
US7835200B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2008 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | May 10, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C13/0038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A level shifter circuit includes first and second supply inputs for receiving a first supply voltage and a second supply voltage, respectively. The level shifter circuit further comprises a shifting circuit configured to receive an input voltage and output a selected one of the first supply voltage and the second supply voltage according to the value of the input voltage. The shifting circuit includes a circuit branch connected between the first supply input and the second supply input. The circuit branch includes a plurality of series-connected electronic devices and a voltage dropper device connected in series with the plurality of electronic devices for introducing a voltage drop. The level shifter circuit includes a bias generator configured to generate a bias voltage for the voltage dropper device according to values of the first supply voltage and the second supply voltage, said voltage drop depending on the bias voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.