PROCESS INPUT DEVICE

• Main Author: KAKEHI ATSUYUKI
• Format: Patent
• Language: English
• Published: 21.12.1989
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

PURPOSE:To eliminate the chattering of a switch and the influence of dispersion in an input circuit by providing a state detection circuit to detect the state change of a large number of switches and a delay circuit to delay the detecting signal of the detection circuit for a prescribed time. CONSTITUTION:For example, when the chattering is generated in the switch, the output signals of the input circuits (3a-3h) are turned on and off repeatedly. Meanwhile, in the beginning of the change of the on/off state, the detecting signal S1 outputted from the state detection circuit 11 is added on an input buffer 4 as an input trigger signal TG after the lapse of a delay time at the delay circuit 12. Therefore, the signal of the switch is stored in the input buffer 4 in a state where the chattering is statistically determined and the on state is established.