Circuit arrangement for the control of a digitally settable load
US4220849A · kind A · utility
5Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 24, 1978 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | May 24, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/0245
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A manually operated direct-current generator, with an output voltage whose polarity and magnitude depend on the direction and speed of rotation of a control knob, charges a storage capacitor in an input circuit of an operational amplifier which works into two comparators respectively responsive to positive and negative voltages exceeding selected thresholds. A triggerable pulse source, upon actuation by either comparator, feeds back one or more discharge pulses to the storage capacitor and also steps a reversible pulse counter in either a forward or a reverse sense.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.