Digital potentiometer with stackable configuration system
US5526274A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1993 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Jul 9, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/804
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An system containing an integrated circuit having two separate potentiometers combined on a single substrate; each potentiometer having three separate output terminals, two being connected to the ends of a resistor string, and the third being a "wiper" terminal electrically connected to a point within the length of the resistor string. All three terminals of each potentiometer electrically float with respect to the other pins of the integrated circuit. Control logic is used to select the point in the resistor string where the wiper terminal is to connect. An additional control signal is used to connect an additional wiper to one of the two separate wiper terminals permitting the connection of the two resistor strings in series.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.