Regulator for substrate voltage generator
US4553047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1983 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Jan 6, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C5/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A regulated on-chip substrate-voltage generator circuit converts a single power supply input and ground potential into a negative potential. The negative potential is applied to the substrate of an integrated circuit upon which the substrate-voltage generator is formed. The substrate voltage generator includes a voltage oscillator connected to a charge pump device. A pair of depletion FETs forms a voltage divider circuit between the ground potential and the substrate potential. An amplifier, formed from depletion FETs, couples the voltage divider into the charge pump. The voltage divider and amplifier regulate the charge pump thereby maintaining tight control over the substrate voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.