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Results tagged with transistors
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user 6127
A transistor is a semiconductor device that can amplify signals and switch power. The types that are used most are BJT (Bipolar Junction Transistor), UJT (Unijunction Transistor), and MOSFET (FET, for Field Effect Transistor).
5
votes
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Which particular transistor types represent triode and pentode vacuum tubes best?
None of the above. They are voltage-controlled, like FETs, but their characteristics are not so similar. Perhaps JFETs are closest, since a more negative voltage on the grid turns them 'off'.
You sho …
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0
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Why won't my BJT transistor work as intended?
The difference between the SS8050 and BC547B is negligible.
The diagram is missing a wire.
Also, make sure you have the button connected the right way.
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Please Explain. NMOS: Vg = 3V, Vd = 5V, source open. For different body connections, Vs is d...
Q: What is the voltage at node x?
simulate this circuit – Schematic created using CircuitLab
A: depends on the channel leakage of the MOSFET and the leakage current of the diode.
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7
votes
Accepted
S8050 transistor currents not like in the datasheet
You are doing this:
simulate this circuit – Schematic created using CircuitLab
You should be doing this:
simulate this circuit
- 4,309
0
votes
Shouldn't internal input resistance of a transistor be almost zero?
The resistance you're thinking of, called dynamic resistance or small signal resistance or differential resistance is the derivative \$dV/dI\$.
For a diode (which is what the base of a BJT looks like …
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votes
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Why is input impedance matching done for amplifiers?
Impedance matching is important in RF circuits to prevent reflections. When the input impedance of the load matches the characteristic impedance of the transmission line there is no reflection at the …
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Transistors on op-amp power rails
The two small transistors keep its vcc/vee dc biased at +-19V which is as high as it can handle. The darlingtons use the +-38 V …
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2
votes
Transistor Push Pull Stage to drive Mosfet
Use a totem pole driver:
simulate this circuit – Schematic created using CircuitLab
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Negative base current
When transistors are used in Darlington configuration they are usually used with resistors R1, R2 to allow the driver to provide the reverse recovery current to Q2 and to prevent leakage (amplified by … \$\beta^2\$) from turning on the transistors. …
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0
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Biasing circuit with mosfet: am I missing information or misreading it?
If Vds of M1 is 1.4V and Vgs of M2 is 2.4V, how can Vb be 5V?
Vdd is not needed because I1 is an ideal current source.
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