Simulation of stabilized power supply for cascades of amplification in measuring devices

This article presents the results of modeling in the Multisim 11.0 software environment of the dependences of the electrical parameters of the linear power supply implemented on the KR142EN8V chip on the resistance of the secondary winding of the transformer Ri in the range from 0.1 to 10 ohms when the capacity of the smoothing capacitor changes from 0.1 mF to 5 mF. The studies were carried out under the condition of a current flow in an active load equivalent to the power supply circuits of operational amplifiers with a value of up to 0.25 A. The conditions for the formation of output voltage ripples at a span level of no more than ± 1 mV were determined.