PURPOSE: To prevent the counting concerned, by adjuting a clock pulse frequency in accordance with a sliding speed of a brush which slides on a comb tooth like conductive pattern.
CONSTITUTION: When a slide brush 102 is started from a start signal generating pattern 103 of one end of a comb toothlike conductive pattern, a start signal is inputted to a clear terminal of a counter 104, and counting of a clock pulse of a pulse generator 105' is started. In this case, when frequency of the clock pulse is adjusted in accordance with a speed of the brush, an output signal (a signal from an output "8") of the counter 104 can be made to one against one contact. This output signal is counted by a counter 108, and when contents of a preset signal source 110 coincide with the counting value, the sliding brush is stopped by an output of a comparator 109. In this way, for instance, a diaphragm value is decided.
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SAKURADA NOBUAKI
ITOU FUMIO
ITOU TADASHI
MURAKAMI HIROYASU
SHINODA NOBUHIKO
