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Need help to troubleshoot the simulation.

		
	
				

			

									
					    isra2025
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 27, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Software
    
    		        		            		    
    Product Number:  FZ2400R17HP4_B29 
    
    		        		        		        
    Software Version: LTspice
    
    		    		    
    
		    		    
		    			
    
			    
    Hi,
    

    I am trying to simulate a double pulse test in LTspice based on Fig.2 (b) from the attached reference document. I am encountering some issues with setting up the dependent current source (G element) and validating the results.
    

    I have attached the LTspice simulation files along with the document for reference. Could anyone please guide me on:
    

      

    1. 

      Correctly implementing the voltage-controlled current source (G) as shown in Fig.2 b.
      

      2. 

    2. 

      Properly validating the current and voltage waveforms in the simulation.
      

      

      3. 

    

    Your guidance and suggestions would be highly appreciated.
    

    

    Thanks & Regards,
    

    M. Israyelu.
    

    

    PDFDouble_Pulse_Test2@.asc
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Oct 27, 2025 2:15 PM
            
            
						
			            		
      
		
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      Hi  ,
      

      Your G source has no gain (transconductance) defined and nc- is left floating. I fixed this in the schematic and ran it, assuming the nc- connection should just go to the lower voltage input, and commented out the indeterminant directive (described below).
      

       
      

      Tthis line:
      

      I_C C E {min(K * max(0, V(G,E) - Vth), Imax)}
      

      Trying to measure something, i.e. .meas, define a new param? Not sure what is going on here. A few syntax errors either way.
      

      mike
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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                on Oct 28, 2025 6:46 AM
            
            
												
						in reply to MStokowski
					
										
			            		
        
		
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        Hi
        

        Thanks for your response.
        

        I am currently unable to simulate the circuit shown in Figure 2(b) of the attached document in LTspice, using the parameter values provided in the reference document. In particular, I am facing difficulty in validating the implementation of the dependent current source as described in the reference.
        

        I kindly request you to simulate the circuit in LTspice and share the necessary details. This information will be highly helpful for my further analysis and for the hardware implementation phase.
        

        

        Thanks for your valuable support.
        

        Israyelu.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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