Charge pump with constant boosted output voltage
US6577514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2001 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Apr 5, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump regulator for providing a constant boosted voltage at the output of a charge pump includes: 1) a charge pump; 2) a clamping regulator; and 3) a clamping transistor. Certain preferred embodiments further include an auxiliary charge pump that provides a voltage above VDD or below ground to the clamping regulator. The clamping transistor provides a voltage supply level (Vsupp) to the oscillating clock signal generator which uses Vsupp to drive the oscillating clock signals that charge the energy injection capacitors of the charge pump between Vsupp and a reference voltage (Vref). The invention includes regulators for use with positive and negative charge pumps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.