基于CTIA的红外探测器读出电路高动态范围优化

o improve the dynamic range of infrared readout circuits, this paper proposes a novel architecture featuring asynchronous integration reset functionality. The design employs a hybrid analog-digital output structure combining a Capacitive Transimpedance Amplifier (CTIA), a comparator, and a counter. By implementing multiple folded integrations of the input signal across the pixel\'s integration capacitor, the circuit effectively enhances charge-handling capacity and dynamic range. Simulation results demonstrate successful integration and readout of input signals ranging from 10 pA to 4.5 nA. After output link fitting, the linearity K- reaches 98.27%, with a dynamic range of 84.5 dB. This design is suitable for future applications in both area-array and linear infrared detectors.