An electronic circuit and a method of generating an electrical discharge for an ionization detector system. The transmitter is provided with a detection processing unit for detecting a process variable and processing an electric signal which is based on the process variable. Also included in the bus state controller is a control register for controlling the time to set up PC card start signals where a synchronous DRAM is configured. Some locating elements are mechanically fixed to the chuck for securing the workpiece from transverse movement on the chuck surface. The cap-applicator can have a sharp intsernal piercing tip capable of piercing the reservoir when the assembly is converted into an active configuration. The exit pupil is spatially and temporally divided into a plurality of areas, a passing beam to each area is controlled, and control is effected on switching between parallax images on the image display means corresponding to passing beams through the respective areas of the exit pupil, whereby a plurality of parallax images are perceived by a single eye of an observer.