Fig. 1. Digital infrared focal plane detector product of Lockheed Martin Corporation

Fig. 2. Diagram of analog infrared focal plane detector

Fig. 3. Output signal of analog infrared focal plane detector

Fig. 4. Schematic diagram of the output buffer and interface of the analog infrared focal plane detector

Fig. 5. Diagram of the column-level ADC digital readout integrated circuit

Fig. 6. Schematic diagram of the readout unit cell circuit

Fig. 7. Noise and velocity index distribution diagram of ADC architecture for image sensor

Fig. 8. Diagram of parallel to serial conversion and data transmission circuit

Fig. 9. Block diagram of the digital pixel infrared focal plane readout circuit

Fig. 10. Structure diagram of PFM digital pixel

Fig. 11. Waveforms diagram of PFM digital pixel

Fig. 12. Structure diagram of charge subtraction digital pixel

Fig. 13. Structure diagram of two-step digital pixel