Input/output voltage detection type substrate voltage generation circuit
US5952872A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Mar 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C5/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An input/output voltage detection type substrate voltage generation circuit that of effectively prevents the electric potential of the substrate from being increased by varying the driving capability of a substrate voltage generation circuit. The input/output voltage detection type substrate voltage generation circuit preferably varies the driving capability by detecting an input electric potential of a data input/output terminal. The circuit includes a variable period type oscillator for receiving first, second and third signals as inputs to varying periods of the oscillator and a charge pump for pumping an electric charge to the substrate in accordance with a driving signal output from the variable period type oscillator and based on the variable period of the oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.