Long time-constant integrator

Abstract

A differential integrator that uses a matched resistor array to reduce integrating currents and thereby realize a long time constant. The differential integrator comprises a differential operational amplifier having inverting and noninverting amplifier input terminals, and inverting and noninverting amplifier output terminals, the amplifier output terminals form inverting and noninverting output terminals, respectively, of the differential integrator. The differential integrator also comprises a noninverting differential integrator input terminal and an inverting differential integrator input terminal. The differential integrator also comprises a resistor array that couples the noninverting differential integrator input terminal to the inverting and noninverting input terminals of the amplifier, and the resistor array also couples the inverting differential integrator input terminal to the inverting and noninverting input terminals of the amplifier.

Dependencies are inferred from the claim text.