ABSTRACT
In this paper, a new driving amplifier to charge and discharge actively and quickly is newly devised. A large-current-type NMOS FET is employed which has superior switching characteristics. As a result, fast response of the applied voltages is obtained, which rise from OV to 100V in 24 microseconds and decreases in the same period. Figure 4 shows the results of step response of the poppet displacement. During this experiment, in order to observe easily the transient motion, the space between the poppet and the valve sheet is set much wider than 15 micrometers.
