Input signal reading circuit

Abstract

Abstract PURPOSE:To eliminate a chattering noise stably, by sampling and counting input data and by outputting a low output when the count value is higher than a constant value and by outputting a high output when it is lower than the constant value and by supplying these outputs to a reading circuit. CONSTITUTION:After reset by a reset pulse 6 from a timing pulse generating circuit 2, an integral counter 1 starts counting the section of input data 4 by sampling clocks 5. When data 4 is high, a high value is much considerably at the sampling time even if a low value is generated by a noise or the like, and the value of the counter 1 exceeds a constant value, and therefore, an integral output 7 outputs a high signal to a reading circuit 3 till the generation of a read timing pulse 8, and simultaneously, counting of the counter 1 is inhibited through a gate. When data 4 is low, a low value is much considerably at the sampling time even if a high section is generated by a noise or the like, and the count value of the counter 1 does not exceed the constant value, and therefore, the integral output is low stably.

Inventors

• 👤 Nagayasu Harada

Bibliographic Details