WANG Yuan, ZHOU Yi-fei, WANG Xiao-long, et al. Signal conditioning of piezoelectric sensor and design of output chip[J]. 2017, 36(11): 99-102. DOI: 10.13873/j.1000-9787(2017)11-0099-04.
In order to improve integration of measurement system based on piezoelectric sensor
a signal conditioning and output chip for piezoelectric sensor is designed by employing 1 μm high-voltage bipolar-CMOSDMOS( BCD) process. The proposed chip consists of impedance conversion circuit based on voltage amplifier
programmable gain amplifying circuit
and two-wire current output circuit. Simulation results show that the designed chip has advantages of high input impedance
large unity-gain bandwidth
and wide programmable totalgain range. Under wide supply voltage range(12
24 V)
the current consumption of the chip is only 3. 1 m A.
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references
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