CMOS voltage regulator with diode-connected transistor divider circuit
US5783934A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1997 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Nov 5, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45424
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The voltage regulator of the present invention is configured in a negative feedback operational amplifier loop with diode connected p-MOS devices serving as a resistor divider to reduce the current loading to the voltage multiplier. Each diode connected p-MOS has its own well tied to its source so the VGS (gate to source voltage) of each p-MOS is precisely mirrored across the diode chain by the negative feedback action. This gives a precise voltage at the output of the regulator referenced to a reference voltage VREF. The regulator uses very little current without requiring large value resistors by utilizing the diode connected p-MOS transistors as a resistor divider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.