Temperature compensation circuit

Details Temperature compensation circuit Temperature compensation circuit

1996-02-15

1997-06-17

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Thermal

330 1R, G01R 3128

Patent

active

056400853

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.

REFERENCES:
patent: 3735274 (1973-05-01), Nelson
patent: 3886435 (1975-05-01), Steckler
patent: 5493078 (1996-02-01), Uchiiker
Electronics Letters, 7 Jan. 82, vol. 18, No. 1, pp. 24 to 25, "Bandgap Voltage Reference Sources in CMOS Technology," by R. Ye and Y. Tsividis.

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