Voltage ratio to current circuit
US5391947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit for providing an output current proportional to a first voltage raised to a fractional exponential power divided by a second voltage raised to a fractional exponential power, is supplied. The circuit has four strings of series connected pn junctions. The first and second voltages are connected to the first and fourth string, respectively. A reference current is provided to the second string, while the third string provides the output current. The number of pn junctions are chosen to give the desired fractional exponents of the two voltages while the number of pn junctions in the third string is selected to adjust for the number of pn junctions in the other strings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.