Charge pump circuit for low supply voltage applications
US5481221A · kind A · utility
11Cited by
9References
23Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 16, 1994 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Feb 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump circuit includes a pair of series switching devices coupled between an output node of the circuit and an input node. A power stage drives a charge transfer capacitor which is coupled to an intermediate node between the series switching devices. The power stage has an input coupled to the input node of the circuit, The power stage further includes a bootstrap capacitor for maintaining a conductive state during an entire half of a cycle of a period of oscillation of a local oscillator. The series switching devices may be driven in phase opposition by either a CMOS invertor or a pair of comparators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.