The design method,operational principle and circuit process of programmable weak current amplifier based on ICL7650 were introduced, and the amplifier s circuits were partially given.

The novelty is its original design of the three-way self-adaptive micro current amplifying circuit module,which solved the contradiction that the weak pyroelectric current has narrow dynamic range,high sensitivity,but the large pyroelectric current has broad dynamic range,low sensitivity.

Line driver current amplifiers for SLIC applications;

Two kinds of methods such as lead net rectification and negative feedback rectification are proposed, which can increase the output current speed of the current amplifier.

The numerical simulation of 3D flow in jet-deflection microfluidic amplifiers for different operation statuses are made by using the 3D flow solver CFD-ACE+.

We adopt the advanced technique of chopper stabilizing zero to develop the micro-current amplifier, and gain the digital display of the measured results; we design andselect reasonably the monochrometer and phtomultiplier (PMT),and make the UPS nega-tive high voltage source used for PMT, attaining higher sensitivity,larger dynamic rang.