How to sweep Vbe to get y-parameter of BJT in Pspice

Thread Starter

Ngô Đình Nhân

Joined Jan 8, 2017
45
Hi all
I am doing a simulation of the amplifier circuit using BJI as an active component.
To do that, I need to get the y-parameter of only BJT in the Pspice like:
Emitter common circuit, to find y11 and y21, I put a VSIN between B - E pin, and E- C pins are connected together and to ground.
, to find y21, y22, VSIN is put in C-E pin, and B - E pins are connected together and to ground.
Then y-parameter will be calculated by y=i/V

I found some papers but actually, I don't know how the author can sweep the Vbe in the Transient analysis? Like this graph

Image 9.jpg
So if anyone knows, Plz help me! This is very important to me,

Best regards and thanks for reading
 

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Thread Starter

Ngô Đình Nhân

Joined Jan 8, 2017
45
Dear crutschow
Here is my code:

*Analysis directives:
.TRAN 0 1us 0 1ns
.STEP LIN PARAM VVAL 0.001 3 0.1
.PROBE V(*) I(*) W(*) D(*) NOISE(*)
.INC ".\y-parameter-SCHEMATIC1.net"

**** INCLUDING y-parameter-SCHEMATIC1.net ****
* source Y-PARAMETER
R_R1 N01038 -5V 250
X_U1 N01166 0 0 N01038 +5V -5V OPA861_MODEL
V_V2 +5V 0 0Vdc
V_V3 0 -5V 0Vdc
V_V1 N01166 0
+SIN 0 {VVAL} 10Meg 0 0 0
.PARAM VVAL=1
.END

I think Pspice have already generated .STEP command,

Plz see my set up for simulation
OPA861.jpg para sweep.jpg simulation setup.jpg
How can I change the X-axis from time to Vbe?screen.jpg
Best regards
 

Thread Starter

Ngô Đình Nhân

Joined Jan 8, 2017
45
Hi all
I have already found the solution for this problems.
An error may occur attempting to change the x variable from time to another one:
ERROR(ORPROBE-3217): Only 1 expression allowed for the X variable
solution: add '@1' to the name of the desidered x variable.
For example V(J2:d) becames V(J2:d)@1
 
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