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Enable Bias Current Display Problem !

Mohammad Taha

Hello!

I designed a bridge circuit as shown in the figure and I am using a Vpulse or an Ipulse to power it and I wanted to Enable the Bias Curren display but all I get is 0A (See Figure). I do not know what is the problem, i thought it was because of the the Pulse source but I used the Enable Bias Current Display with another circuit with Vpulses as source and the current was shown.

II need to know why I get 0A in display ( while measuring it with a probe I get 10uA)

Thanks in advance  

  • oldmouldy

    The Bias for the circuit is calculated, then the simulation starts at time=0, for your circuit, at time 0, the Ipulse output is 0, hence the displayed Bias values are 0. Also your Ipulse has 0 for Tr and Tf values, you should specify some practical rise and fall times for the pulse to avoid simulations issues with "instantaneous" changes. You will need to use a Transient Analysis to see the "dynamic" behaviour of your circuit. You could set I1 to a non-zero value to see that effect of a static current on the bias, if required.

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