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D4289451A
AntiGlitch / AntiChattering
AntiGlitch and AntiChattering functions filter noise and unstable state of the digital input (trigger signal).
AntiGlitch circuit performs the digital integration of the trigger signal.
It is effective to remove impulsive noise.
AntiChattering circuit sets the edge insensible time to avoid trigger malfunction.
It is effective to remove unstable logic state and switch-chattering.
Low
High
Low
Trigger Signal
(Skewed)
High
Low
Trigger Signal
(Original)
high slew rate
noise
low slew rate
Digital Input
High
High threshold
AntiGlitch
Value
High
Low
High
Low
Low threshold
Delay
AntiChattering
Value
Valid
Signal
AntiChattering Circuit
Output
Integration of
Digital Input
AntiGlitch Circuit
Output
Valid
Edge
Invalid
Edge
Valid
Edge
Valid
Signal
Valid
Edge
Valid
Edge
Insensible
Time
Insensible
Time
Glitch
Chattering
Fig. AntiGlitch and AntiChattering