Temperature compensation circuit
US5640085A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Feb 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature compensation circuit for a power measurement device includes an input sensor, with a temperature-dependent transmission factor (K.sub.H,T), connected to a signal processor with a temperature-dependent transmission factor (K.sub.S,T). Transmission factor (K.sub.S,T) of the signal processor is inversely proportional to a temperature-dependent reference voltage (U.sub.R,N,T), which is inputted to the signal processor in order to render the combined transmission factor (K.sub.H,T .multidot.K.sub.S,T) temperature independent. To accomplish this, a temperature coefficient value of reference voltage (U.sub.R,N,T) must be equal to the sum of a temperature coefficient value of transmission factor (K.sub.H,T) and a temperature coefficient value of transmission factor (K.sub.S,T). The desired temperature coefficient value of reference voltage (U.sub.R,N,T) is predetermined, and can be programmed into the inventive temperature compensation circuit, so as to accommodate variations in temperature coefficient characteristics of the internal components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.