Integrator structure for reducing drift voltage influence

This paper aims to design a high precision, low drift analog integrator, The method used is to use integral resistance to control the drift generated by the integrator. The main idea is to use the best circuit structure to minimize the zero drift and non-linear error, and select the high-precision components, As far as possible to use a large integral resistance, The op amp has a large open-loop gain and high input impedance and good high frequency characteristics as much as possible, high input impedance frequency integrated circuit, the integral circuit in the non-inverting input access adjustable balance resistor, and the use of two integrators for the poor structure. Finally, the results was summarized and the Cadence simulation is carried out.