| 摘要 |
The voltage corresponding to the pressure outputted from a Wheatstone bridge having resistors R1 to R4 is amplified by a differential amplifier 3 and operational amplifiers OP1, OP2, and then outputted through an output terminal 4 to an external device as the output voltage VOUT. The offset voltage ZSOUT is outputted from the operational amplifier OP10. The output voltage VOUT and the offset voltage ZSOUT are fed back to the reference source voltage Vsen by operational amplifiers OP3 to OP5. In consequence, a non-linear output property of output-attenuating or output-increasing type can be easily obtained, while errors due to the offset voltage ZSOUT can be diminished.
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