Method for temperature compensation of a digital pressure meter
AssigneeTaiwan Silicon Microelectronics Co., Ltd.
InventorsChih-Tai Yeh, Li-Jen Shih
Life of this patent
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Abstract
A digital pressure meter is equipped with an operational (OP) amplifier circuit, and a thermistor circuit is connected with the OP amplifier circuit for causing change of an amplification ratio of the OP amplifier circuit with such that a temperature compensation for output signals is effected; the thermistor circuit includes thermistors with positive temperature coefficient or ones with negative temperature coefficient; with the help of the thermistor circuit, the digital pressure meter can perform a measurement with an accuracy of ±1% FSO (full scale output) within the working temperature range.
Claims12
A method for temperature compensation of a digital pressure meter, according to which method a digital pressure meter is equipped with an operational amplifier circuit, and the operational amplifier circuit is connected with a thermistor circuit used for causing change of an amplification ratio as well as for effecting temperature compensation for output signals;
- the thermistor circuit including a plurality of thermistor whose resistance will change as surrounding temperature changes, thus causing amplification ratio of the operational amplifier circuit to change.
Dependencies are inferred from the claim text.