DAC-based voltage regulator for flash memory array
US6771200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2003 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Apr 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DAC-based voltage regulator system for a non-volatile memory device comprises a charge pump circuit having an enable input and a voltage output node. A voltage-to-current converter has an input coupled to the voltage output node and an output coupled to a virtual ground node. A current source is coupled to the virtual ground node and sinks one of a plurality of currents in response to states of a plurality of digital input signals. A transconductance amplifier has an inverting input at the virtual ground node, a non-inverting input coupled to a reference voltage potential, and an output. A comparator has a first input coupled to the output of the transconductance amplifier, a second input coupled to a reference voltage potential, and an output coupled to the enable input of said charge pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.