[SOLVED] Simulating with LT Spice

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engr_joni_ee

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Hi, I am trying to simulate in LT Spice but I don't know what happen it is not showing the waveform window. It complain with node u1:1. How do I find that node. I don't have that node in my circuit.



 

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First way, to find a node is by using search (Ctrl + F) and enter its label
--- Updated ---

Your circuit has surely an element labelled U1.
 
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Alright, here is my circuit in which I am simulating ADC driver, single ended to differential. The input is 100 mV sine wave frequency 1 KHz the output should be differential around VCM 0.9 V but actually it is not. I am using the ADC driver LTC6409. the circuit is attached. Is there anything missing in the circuit ?

 

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barry said:
maybe the problem is your model for u1. where did you get that?
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The u1 error is no more there. I am now simulating ADC Driver as shown in previous post. The waveform appear but not as expexted. The output should be differencial around VCM which is 0.9 V but it is not.
 

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First step is to correct your negative power supply which is actually feeding +2.5V. You either want to connect the positive terminal of a -2.5V source or the negative terminal of a +2.5V source...
 

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I have corrected the power supplies, and now it has correct output. Thanks for pointing out.
 

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