Stacked photoelectric detection front amplifier assembly

The invention relates to the field of photoelectric detection, in particular to a stacked photoelectric detection preamplifier assembly, which adopts an integrated process to package and integrate a large-target-surface QD and a small-target-surface APD, integrates the advantages of high-precision detection of the QD and high-sensitivity receiving of the APD, avoids the inherent contradiction between the target surface size of a detector and the modulation bandwidth, reduces the installation and adjustment difficulty of a system, and improves the detection efficiency. Tracking communication integration under a high transmission rate is realized, and low transmission rate tracking communication integration is downwards compatible. A multi-stage amplification and multi-stage gain adjustment design scheme is adopted, under the condition that the receiving optical power changes, amplifier depth saturation and signal distortion are avoided, and a final-stage output level signal is maintained in a fixed linear inte