Negative voltage regulator
US7145318B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2005 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Nov 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/465
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A first voltage divider includes a first resistor having a first resistance coupled to a positive voltage reference in series with a second resistor having a second resistance and coupled to ground. A second voltage divider includes a third resistor having the first resistance coupled to the positive voltage potential in series with a fourth resistor having the second resistance, and a fifth resistor having a third resistance and coupled to a negative voltage. A comparator has an inverting input coupled to the junction of the first and second resistors and a non-inverting input coupled to the junction of the third and fourth resistors. The first and third resistors are equal and the second and fourth resistors are equal. The fifth resistor has a value chosen to drop a voltage equal to the target voltage to be regulated when the voltage regulator output is equal to that target voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.