fig14

Figure 14. (A) A modified electrical grounding circuit and designed PCB board for 32 × 32 piezoresistive tactile arrays. This figure is quoted with permission from Luo et al.^[64]. (B) Signal process circuit for the capacitive bimodal tactile sensor array. This figure is quoted with permission from Chen et al.^[13]. (C) Designed readout circuit for fingerprint sensor. This figure is quoted with permission from An et al.^[65].