I am trying to get a 74HC14 hex inverting schmitt trigger to work. First thing I did was connect it to a power supply.
When I connect the Vin and Ground ports to my bench power supply (5V), some noise is added on the 5V signal. See the figures. The first figure just shows the 5V from the power supply without the schmitt trigger connected. The second pictures shows the situation after connecting.
I tried a few different ones, but they all give the same result
Am i doing something wrong here. I intend to use the trigger to clear up noise from a signal, not to add noise.
Any idea is appreciated.