CIRCUITO DI INTERFACCIA DI CONTROLLO

摘要

In a control interface circuit for selectively applying a signal to initiate a function in a control device, such as solid state power controller, there is an optical coupler whose primary side is connected in series with a plurality of impedance elements. The transistor switch elements are associated with the various impedances to selectively modify the amount of impedance in the active circuit between the control input terminals. The transistor switch elements are optically controlled by optical coupler devices receptive of inputs from the control device and are maintained with a means for supplying operating voltage that limits the voltage to a value that can be charged in less than the sampling pulse time.