Title:
RECOGNIZING DEVICE FOR ELECTRICAL SIGNAL
Document Type and Number:
Japanese Patent JPS6079407
Kind Code:
A
Abstract:
PURPOSE:To eliminate a wrong decision due to a noise by controlling the operation of a control circuit which controls an input circuit according to a program. CONSTITUTION:An input circuit 1 outputs a signal indicating whether the voltage level of an input electrical signal is higher than a specific level or not, and this signal is sent to a control circuit 3 and sampled. A storage circuit 2 is stored with the program for controlling the control circuit 3, and a timer circuit 4 is supplied with the timing signal required by the control circuit 3. Signal logic determined at some sampling point is compared with the last signal logic which is one cycle before, and when the both are equal, it is decided that the signal logic continues. When the both are different, on the other hand, it is considered that the inversion is caused by a noise or unknown, a measurement is taken repeatedly at a point which is a specific time behind the sampling point, and the logic determined by said measurement is regarded as the current correct logic.
Inventors:
FUTAKI HIROYUKI
Application Number:
JP18783283A
Publication Date:
May 07, 1985
Filing Date:
October 07, 1983
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H03K5/1252; G05B21/02; G06F3/00; G06F13/00; (IPC1-7): G05B21/02; H03K5/00
Attorney, Agent or Firm:
Masuo Oiwa