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The paper presents a flexible polyimide fingerprint sensor driver IC driven by a 0.18‐μm CMOS technology and studies the sensor bendable performance. The finger valley and ridge are sensitive to environment noise; therefore, we propose low‐ripple cross non‐overlap charge pump that performs 7.2 V pumped output voltage with Δ30 mV ripple and 98.36% pump efficiency to increase the sensing level and propose...
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