Capacitive voltage converter employing CMOS switches
US3975671A · kind A · utility
76Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G19/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A CMOS circuit for approximately tripling battery voltage particularly adaptable for use with liquid crystal displays such as used in watches. P-wells of the CMOS circuit are coupled to active circuit nodes rather than to battery potentials. In the presently preferred embodiment a hybrid circuit with external capacitors is used to increase overall efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.