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Energy consumed by a digital circuit

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reddvoid

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I have a digital circuit , to find the energy consumed by the circuit, I am monitoring the current drawn from the supply and integrating it to get the charge pumped into the circuit ... and the total charge*V supposed to give me total energy consumed by the circuit.

But I am getting a small spike of negative current (current going back into the source?)
which gives me negative charge (charge going back in to the source?)
which gives me negative energy ( Energy gained by the source?)

Do I have to consider this negative energy while calculating total energy consumed by the circuit or should I neglect it ?

Thanks in advance
 

Hi,

if this current really is in reverse direction AND you don´t dissipate this reverse energy somehow, then .. a short time later your circuit will consume this energy and does not need to draw it form your usual supply.
--> your integrator needs to take care of it as negative energy.

Klaus
 
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