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Research of pressure sensor chip utilizing novel electrical circuit with bipolar-junction transistor-based (BJT) piezosensitive differential amplifier with negative feedback loop (PDA-NFL) for 5 kPa differential range was done. The significant advantages of developed chip PDA-NFL in the comparative analysis of advanced pressure sensor analogs, which are using the Wheatstone piezoresistive bridge, are clearly shown. The experimental results prove that pressure sensor chip PDA-NFL with 4.0 × 4.0 mm2 chip area has sensitivity S = 11.2 ± 1.8 mV/V/kPa with nonlinearity of 2KNLback = 0.11 ± 0.09%/FS (pressure is applied from the back side of pressure sensor chip) and 2KNLtop = 0.18 ± 0.09%/FS (pressure is applied from the top side of pressure sensor chip). All temperature characteristics have low errors, because the precision elements balance of PDA-NFL electric circuit was used. Additionally, the burst pressure is 80 times higher than the working range.
Electronic Devices and Semiconductor Manufacturing, Engineering, Electrical and Electronics, Automotive Engineering, Aerospace Engineering, Electrical and Computer Engineering
Electronic Devices and Semiconductor Manufacturing, Engineering, Electrical and Electronics, Automotive Engineering, Aerospace Engineering, Electrical and Computer Engineering
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