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Results tagged with bjt
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user 140653
BJT stands for Bipolar Junction Transistor. It is a three-terminal electronic device constructed of doped semiconductor material and may be used in amplifying or switching applications.
0
votes
1
answer
85
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Why is the BJT in this circuit in active mode?
I don't know why the BJT is in Active mode ant not in saturation mode. …
- 39
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1
answer
2k
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How to calcuate base resistance from BJT circuit?
How do I approach this question?
My attempt:
$$I_{C} = 1mA$$
$$I_{B} = \frac {I_{C}} {\beta} $$
$$10 - I_{B}R_{B} - 0.7 = 0 $$
$$R_{B} = \frac{\beta (10 - 0.7)}{I_{C}}$$
$$R_{B} = 930 k\Omega$ …
- 39
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2
answers
30k
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How do you calculate the output voltage swing in an amplifier?
I have already calculated the DC values and the downswing of the circuit. I am not sure on how to calculate the no-load voltage upswing.
The values already calculated are:
$$I_{C} = 4.416 mA$$
$$V …
- 39
1
vote
2
answers
3k
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How does early voltage affect collector current?
The transistor in the following circuit is said to feature \$I_{C} = 1.0mA\$ at \$V_{BE} = 0.7V\$ and \$V_{CE} = 10V\$. If \$V_{A} = 50V\$ and \$\beta = 50\$, find \$V_{B}\$ and \$V_{C}\$.
sim …
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vote
1
answer
814
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How to calculate collector current in in a CC amplifier when given current source?
simulate this circuit – Schematic created using CircuitLab
How do I calculate the \$I_{C}\$ from the circuit above?
I tried using \$KVL\$ using this equation:
$$-100I_{B} - 0.7 +10 = 0$$
$$I_ …
- 39