Hi,
The topic title is may not be very descriptive, let me describe my dilemma here. As we learnt in school:
DC is when the voltage is solid, lets say constant 5V
AC is when the voltage reverses direction periodically, lets say 110V AC in the US
But there is a certain gray area between them, lets say the load on the DC supply changes by time and the voltage drops below the DC voltage.
I am wondering how I should filter such a signal on my computer. If I have a true DC voltage then I just use a digital filter which cancels all the AC signals (ex.: lowpass 10Hz filter). If it is an AC signal then I can use a bandpass filter (ex. bandpass 60Hz filter), to get rid all the superponated voltages.
Now what an earth should I do if I use a DC source, but because of the load the the voltage level drops. It doesnt became an AC signal, since its not periodical, but not a DC signal anymore either.
What would be the right approach?
Thanks.
The topic title is may not be very descriptive, let me describe my dilemma here. As we learnt in school:
DC is when the voltage is solid, lets say constant 5V
AC is when the voltage reverses direction periodically, lets say 110V AC in the US
But there is a certain gray area between them, lets say the load on the DC supply changes by time and the voltage drops below the DC voltage.
I am wondering how I should filter such a signal on my computer. If I have a true DC voltage then I just use a digital filter which cancels all the AC signals (ex.: lowpass 10Hz filter). If it is an AC signal then I can use a bandpass filter (ex. bandpass 60Hz filter), to get rid all the superponated voltages.
Now what an earth should I do if I use a DC source, but because of the load the the voltage level drops. It doesnt became an AC signal, since its not periodical, but not a DC signal anymore either.
What would be the right approach?
Thanks.