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Altera_Forum
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18 years ago

How to remove glitches on Incoming signals ?

Hi *, I have signals coming to the FPGA which are not clean . All these signals are asynchronous signals. I want to remove the glitches on these signals and then feed them to the inputs o...
Altera_Forum's avatar
Altera_Forum
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18 years ago

One method is to lowpass filter your signal with an analogue (passive) low-pass filter and buffer it with a chip external to the FPGA having a Schmitt trigger input. Not sure if Altera devices have Schmitt trigger inputs, thats why I suggest it as an external chip. Added benefit is protection of fpga from destructive signals but is requires an extra chip of course.