| 摘要 |
PURPOSE: A signal compensation circuit is provided to conveniently compensate signals and accurately control the signal compensation by independently adjusting the offset and the sensitiveness, and to enlarge compensation range by removing mutual influence of resistances for compensation. CONSTITUTION: A signal compensation circuit includes a pressure sensor part generating a first output signal and a second output signal depending on the applied pressure through first and second output ends, a first amplifier connected with the first output end for differentially amplifying the first output signal to a first partial pressure voltage, an offset adjustment resistance connected with an output end of the first amplifier for adjusting offset of the output signal of the first amplifier, a second amplifier connected with the second output end for differentially amplifying the second output signal to a second partial pressure voltage, a sensitiveness adjustment resistance connected with input ends of the first and second amplifiers for adjusting the sensitiveness of the first and second amplifiers, a first temperature compensation resistance parallel connected with the sensitiveness adjustment resistance and the input end of the second amplifier and connected with the output end of the second amplifier for compensating the temperature of the adjusted sensitiveness, and a second temperature compensation resistance connected with the offset adjustment resistance and the input end of the second amplifier for compensating the temperature of the adjusted offset.
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