Are bypass caps needed on the reference inputs to a window comparator? If so, what values are recommended?
Typical example here (with no caps):
formatting link
-Bill
- posted
11 years ago
Window comparator bypass cap values?
Loading thread data ...
- Vote on answer
- posted
11 years ago
I have never used any.
Tom
- Vote on answer
- posted
11 years ago
Depends on the rise and fall time of the input, _and_ the comparator. Sufficiently fast edges and a crappy comparator could couple input to references. I tend toward bypassing. ...Jim Thompson
-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et |
Click to see the full signature
- Vote on answer
- posted
11 years ago
OK, I never had a problem but restricted design to clean DC. I agree with your statement.
Tom
- Vote on answer
- posted
11 years ago
If the reference is coming from the power rail directly (as shown in schematic) then I'd add some bypass... no sense having PS stuff on the reference. I'd pick an RC time of 1ms or so, (depending on what stuff was on the supply line.)
George H.