Fig. 1.

New $\mu \mathrm{CIS}$ architecture highlighted in red is the additional components of the new device compared to our previous models. The device only has four I/O pads to make it more compact. The circuit contains the 4T-APS pixel (violet), column amplifier and output buffer (yellow) circuits. Symbols: voltage (V), capacitor (C), MOSFET (M), reset (RST), select (SEL), source follower (SF), transfer gate (TG), FD, bias P-MOS (BP), bias N-MOS (BN), clock (CLK), voltage drain ($V_{\mathrm{DD}}$), ground (GND), and output (OUT).