How to Select R and C for Minimum Integrator Drift

The transfer function for the integrator circuit in Figure 1 is eo/es = 1/RCS where R is the input resistance, C is the feedback capacitance and 1/S is the LaPlace operator denoting integration. This article will show that for a given amplifier, output drift rate due to offset voltage (eos) and bias current (ib) can be minimized by a proper selection of R and C. Read full article



Richard Conant