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titleOfInvention Semiconductor devices
abstract A semiconductor integrated circuit for sensing a physico-chemical property of an ambient includes a pair of semiconductor devices (Q1, Q2) having a similar geometric and physical structure, one device (Q1) being sensitive to the property, the other being insensitive to the property, together with a differential amplifier (A1, A2, A3, A4, A5) having feedback connection to one of the pair of semiconductor devices.
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