High voltage charge pump
US5381051A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Mar 8, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high voltage charge pump (65) for operation at low power supply voltages includes a plurality of series connected pump stages (66), a predriver logic circuit (68), and two pump driver circuits (70 and 72). The predriver logic circuit (68) receives an external clock signal and provides internal clock signals to the pump driver circuits (70 and 72). The pump driver circuits (70 and 72) provided boosted clock signals to the series connected pump stages (66). The boosted clock signals are provided at a voltage greater than a magnitude of a power supply voltage. By using a boosted clock signal, the charge pump (65) is capable of operating in applications with low power supply voltages, such as 3.3 volts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.