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Questions tagged [device-characteristics]

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0answers
32 views

can we use old 4145 S.P.A. to measure the characteristics of the printed devices [on hold]

can we use old 4145 S.P.A. to measure the characteristics of the printed devices. please answer the if you have any links of the answer kindly attach thanks
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1answer
40 views

Torque-Speed Equation for Induction Motor

I am looking for the Torque-speed equation on an Induction Motor that is used to draw the curve.
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1answer
31 views

Enhancement type MOSFET - channel formation

In an enhancement type MOSFET (an n channel one assumed here), when a positive gate to source voltage is applied, the holes of the substrate near the gate move deeper into the substrate away from the ...
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1answer
31 views

Temperature-Dependent Electrical resistance Si and SiC

In a power electronics device, it seems that silicon carbide (SiC) has a higher variation of electrical on-state resistance with temperature in comparison to silicon (Si). Does anybody know the reason?...
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1answer
198 views

Formula for BJT common emitter output characteristics curve

I collected experimental data of input and output characteristics of a BJT NPN in Common Emitter configuration. I need to find the right function to fit the Ic vs Vce, but I'm not finding it. I've ...
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2answers
167 views

Ideally, what sort of characteristics should a transistor have for a regular linear amplifier?

Most of us recognize the graph of \$I_C\$ against \$V_{CE}\$ for different base currents (\$I_B\$): - And, ideally (as we are taught and believe) we would prefer the "constant current" part of the ...
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1answer
147 views

For the same JFET why are there two curves in a Transfer characteristics graph?

I am trying to learn about n-channel JFETs from David. A. Bell's book. In the transfer characteristics graph, there seem to be two curves as shown. Note that VGS(off) = Vp As you can see, one curve ...
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1answer
77 views

Testing a diode's electrical characteristics with temperature control

I would like to test a few diodes electrical characteristics at their device low limit, ambient, and device high limit temperatures. I was thinking of using a Peltier element with a heat sink, but I'...
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0answers
64 views

Current drop a certain vds in a transistor

I am measuring the I-V characteristics in a transistor using a 2 channel source measurement unit (SMU) when I change the \$V_{ds}\$ and measure the current while connecting the gate and the source to ...
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3answers
57 views

Are parts parameter supposed to agree with each other in datasheets

Say, given a power BJT that has a \$V_{CE_{SAT}}\$ = 2V and rated at \$I_{C_{MAX}}\$ = 6A, but \$P_{MAX}\$ = 8W. Clearly, even only considering the \$P_{C}\$, it cannot continuously provide that ...
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1answer
393 views

Different methods to perform UIS testing on a Power Mosfet (EAS)

I am currently looking into building a circuit to test for avalanche stress of a power Mosfet. Normally for this specific test, you would want to create a circuit that looks as follows: simulate ...
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1answer
896 views

IV relation changing load resistor of a solar cell

Consider the configuration in picture, where a solar cell is kept at fixed distance from a light source and the load resistance is changed among different values. simulate this circuit – ...
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1answer
38 views

Why is the base to base characteristics of UJT a straight line passing through the origin?

Why is the base to base characteristics of UJT a straight line passing through the origin? and what do you mean by offstate resistance of ujt??
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1answer
150 views

How to detect type of my DC motor?

According to my last question (summery for lifting one 0.6Kg load across one m1 lead screw up to 20cm at 2 Second), I found one motor in my stock ware so it's type is : RS-540SH 00536725 SO when i ...
2
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1answer
502 views

Transistor absolute maximum Collector-Base voltage more than Collector-Emitter voltage

In the Microsemi 2N918 NPN RF transistor datasheet, the absolute maximum ratings are given as: The fact that \$V_{CBO}\$ is so much greater than \$V_{CEO}\$ has me confused. Additionally, the ...