Multivibrator investigation with account for the diode opening voltage

Abstract

We investigate the well-known non-symmetric multivibrator circuit which contains a capacitor, an operational amplifier, two silicon diodes and several resistors, see Fig. 1. For example, this circuit is a part of the electronics course for the students of telecommunication specialty. The diode CVC is considered to be an ideal one, see Fig. 2. As far as we know, in literature this circuit is described without taking into account the diode opening voltage which is equal to 0.7V, see, for example, [1, 2]. In this paper we propose the mathematical description of the circuit under consideration with account for the diode opening voltage