Fig. 2

The schematic of the proposed time-shared TMC. a The schematic of the proposed time-shared TMC for recognizing 10 images. b The detailed schematic of the time-shared subtractor of IC₃. c The voltage and current waveforms of the time-shared subtractor. During the phase I, I⁻ is measured and stored at C₁. During the following phase II, I⁺-I⁻ can be calculated from recalling the I⁻ which was measured during the previous phase I