Device and method for calibrating R/C filter circuits
US7078961B2 · kind B2 · utility
13Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 2004 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | May 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2210/043
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A calibration unit is designed to contain an oscillator circuit whose frequency is determined by the RC time constant of a resistor, which is of the same type as the resistor used in the filter circuit that is to be calibrated, and of a capacitor device which has been set to a fixed value. The oscillator frequency is converted into counting pulses, and the number of counting pulses which is counted in a modulo binary counter within a time interval is transmitted as a digital calibration signal for a calibratable capacitor device in the filter circuit in order to calibrate the latter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.