A monostable multivibrator circuit is disclosed which provides a relatively constant width pulse despite large variations from circuit to circuit in the switching transfer voltage characteristics of two switching devices used in any one circuit; in any one circuit, each of the two switching devices have the same switching transfer voltage characteristic. The two switching devices are connected in such a manner that the first device is turned on for a time determined by a first time-constant circuit, and the second device is turned on while the first device is on plus a time determined by a second time-constant circuit. In this manner, the effect on the width of the output pulse by the transfer voltages of one device is cancelled out by the effect on the width of the transfer voltage of the other device. Thus a relatively constant width pulse always results.