Title:
CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JPS5679301
Kind Code:
A
Abstract:
PURPOSE:To prevent malfunction due to a periodical noise of an electric power by varying the timing and order where a logical value signal is supplied to a load control part from a switch at every half cycle of the power source. CONSTITUTION:The output of the 1st counters varying successively at intervals of a half cycle of the electric power source is inputted to an address of memory 4, which outputs successively its prescribed memory contents that correspond to the input to the address. At every half cycle of the power source, i.e. on arrival of every input from the 2nd counter 3 for an electric power synchronizing signal, the state of the address is changed and the memory contents are outputted changing in order together with the input from counter 2. Here, the contents of memory 4 in each address is written being changed, so that the timing and order of the supply to the load control part 5 of switch S can be changed. For this purpose, it is made sure that the malfunction is not caused by noise N by checking the same switch S two or three times in terms of the number of half cycles of the power source and then the signals are accepted, so that a prevention against a periodical noise can be taken.
Inventors:
MURAKAMI TOSHIO
Application Number:
JP15621579A
Publication Date:
June 29, 1981
Filing Date:
November 30, 1979
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
G05B9/02; G06F3/02; H05B37/02; (IPC1-7): G05B9/02; H05B37/02