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I have attached a SiC BJT Device output characteristics IC vs Vce curve. I have the problem that some of these curves do not start from origin . They have a negative Ic current at Vce=0 V for different step Ib currents which range from 200ma to 2.2A . Could you tell me what is the reason for...
Thank you for your suggestion .
The Vbe=2.7V is the p - n junction threshold voltage and so at 2.7 volts the Ib curve jumps like an exponential curve and before 2.7 V there is no base current . And the Ic vs Vce curves are correct . I have used the same BJt device.
graph of ib versus vbe
I have tried to measure at the range of 700mV-1200mV but could not get any current . It is because the SiC BJT has threshold voltage at 2.7 V and I have already measured in that range and also did not get good data . So now I would like to know is it possible to do...
plot bjt curves
I have attached the excel file of gummel plot in the message. But when I measure Vbe for negative voltage from 2V to 3.7V I get a message that negative values cannot be plotted in log scale and then after i ignore it it shows an empty plot.
Let me know if I am wrong or my...
vbe of bjt
I have a circuit to calculate the gummel plot Ln(Ic) Ln(Ib) vs Vbe . I connected the base and collector together. I connected a 10 ohmresistor to the base . Then I connected a current source to the resistor and emitter was grounded. I am measuring the collector current and base...
change vbe voltage pspice
How do I keep the potential of base and collector at same potential ? . I have a 370B tektronix curve tracer . What connections or what configuration should I use on this curve tracer to set it up for my measurements.
I connected one wire each to base...
bjt characteristic curve excel
The Test setup you have mentioned is not using curve tracer. I can use only a curve tracer here. So if u have a suggestion for setting up a test using a curve tracer for the Ic vs Vbe measurement let me know.
Added after 2 hours 21 minutes:
transistor parameters vbe pspice
I have attached the IC vs Vce plot . I did not measure the Ic vs Vbe for the device. I also when I try to convert the curve tracer plot to excel file format it does not show me the plot but the the Ib vs Vbe plot is similar to one I am going to attach...
Thank you very much for your suggestion. I have changed the values of ISE and ISC to a value between 0 and 1. So now I have to get the curve down flat between 0 V to 2.7 V and then it should begin to rise upto 2 V . So my question is how to get the slope down to zero between...
gummel plot pspice how to make
Now I have setup my circuit as follows. There is a current source at the base with step curent of 200mA and then a resistor of 1 G ohm is connected . So how do i measure for getting Ib vs Vbe curve . I am getting a linear curve having a slope of 1 when i run the...
vbe on voltage data pspice
I need to model the BJT again now to get the IB vs Vbe curve which I got by experimenting with the real BJT using a curve tracer. Now when i used the curve tracer i had kept the collector open. I gave a step current to Ib for 200mA . So can anybody have any idea...
changing transistor beta value in pspice
My value for NE=4 ISE=3.9e-3 BF=15 IS=39.34e-7
I have got my low current curves for IC fitting with the real Ic Vs Vce curve but when Ichange ISE for large IC then it increases the max IC current to 6 A .