How to tell if a BJT is PNP or NPN by looking at the circuit?What's the difference between NPN and PNP...
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How to tell if a BJT is PNP or NPN by looking at the circuit?
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$begingroup$
Is it possible to tell if a BJT circuit is PNP or NPN simply by looking at the circuit?
For example, for the circuits shown, how can we tell if they're PNP or NPN?
bjt
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
Is it possible to tell if a BJT circuit is PNP or NPN simply by looking at the circuit?
For example, for the circuits shown, how can we tell if they're PNP or NPN?
bjt
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
1 hour ago
3
$begingroup$
I'm voting to close this question as off-topic because there is no evidence of effort to research this answer at all.
$endgroup$
– Andy aka
1 hour ago
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
1 hour ago
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
30 mins ago
add a comment |
$begingroup$
Is it possible to tell if a BJT circuit is PNP or NPN simply by looking at the circuit?
For example, for the circuits shown, how can we tell if they're PNP or NPN?
bjt
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
Is it possible to tell if a BJT circuit is PNP or NPN simply by looking at the circuit?
For example, for the circuits shown, how can we tell if they're PNP or NPN?
bjt
bjt
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
asked 1 hour ago
Jimmy VailerJimmy Vailer
355
355
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Jimmy Vailer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
1 hour ago
3
$begingroup$
I'm voting to close this question as off-topic because there is no evidence of effort to research this answer at all.
$endgroup$
– Andy aka
1 hour ago
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
1 hour ago
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
30 mins ago
add a comment |
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
1 hour ago
3
$begingroup$
I'm voting to close this question as off-topic because there is no evidence of effort to research this answer at all.
$endgroup$
– Andy aka
1 hour ago
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
1 hour ago
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
30 mins ago
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
1 hour ago
3
3
$begingroup$
I'm voting to close this question as off-topic because there is no evidence of effort to research this answer at all.
$endgroup$
– Andy aka
1 hour ago
$begingroup$
I'm voting to close this question as off-topic because there is no evidence of effort to research this answer at all.
$endgroup$
– Andy aka
1 hour ago
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
1 hour ago
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
1 hour ago
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
30 mins ago
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
30 mins ago
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
Quite simply, look at the arrow on the leg.
The arrow will always be on the emitter. Look at where the current flows. The arrow will always follow the current flow.
When the arrow is pointing away from the base, it is an NPN. When pointing towards the base, it is a PNP.
answered 1 hour ago
MCGMCG
6,33631747
$endgroup$
add a comment |
$begingroup$
If the arrow points towards the base it is a PNP, if it points away from the base it is an NPN.
Further, the arrow will typically be on the more positive leg for PNP and negative for NPN.
answered 1 hour ago
evildemonicevildemonic
2,233720
$endgroup$
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
All but one....
$endgroup$
– evildemonic
1 hour ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
1 hour ago
|
show 2 more comments
$begingroup$
This diagram should explain everything
Any additional questions?
answered 1 hour ago
G36G36
5,3901511
$endgroup$
add a comment |
Your Answer
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Quite simply, look at the arrow on the leg.
The arrow will always be on the emitter. Look at where the current flows. The arrow will always follow the current flow.
When the arrow is pointing away from the base, it is an NPN. When pointing towards the base, it is a PNP.
answered 1 hour ago
MCGMCG
6,33631747
$endgroup$
add a comment |
$begingroup$
Quite simply, look at the arrow on the leg.
The arrow will always be on the emitter. Look at where the current flows. The arrow will always follow the current flow.
When the arrow is pointing away from the base, it is an NPN. When pointing towards the base, it is a PNP.
answered 1 hour ago
MCGMCG
6,33631747
$endgroup$
add a comment |
$begingroup$
Quite simply, look at the arrow on the leg.
The arrow will always be on the emitter. Look at where the current flows. The arrow will always follow the current flow.
When the arrow is pointing away from the base, it is an NPN. When pointing towards the base, it is a PNP.
answered 1 hour ago
MCGMCG
6,33631747
$endgroup$
Quite simply, look at the arrow on the leg.
The arrow will always be on the emitter. Look at where the current flows. The arrow will always follow the current flow.
When the arrow is pointing away from the base, it is an NPN. When pointing towards the base, it is a PNP.
answered 1 hour ago
MCGMCG
6,33631747
answered 1 hour ago
MCGMCG
6,33631747
answered 1 hour ago
MCGMCG
6,33631747
answered 1 hour ago
MCGMCG
6,33631747
6,33631747
add a comment |
add a comment |
$begingroup$
If the arrow points towards the base it is a PNP, if it points away from the base it is an NPN.
Further, the arrow will typically be on the more positive leg for PNP and negative for NPN.
answered 1 hour ago
evildemonicevildemonic
2,233720
$endgroup$
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
All but one....
$endgroup$
– evildemonic
1 hour ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
1 hour ago
|
show 2 more comments
$begingroup$
If the arrow points towards the base it is a PNP, if it points away from the base it is an NPN.
Further, the arrow will typically be on the more positive leg for PNP and negative for NPN.
answered 1 hour ago
evildemonicevildemonic
2,233720
$endgroup$
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
All but one....
$endgroup$
– evildemonic
1 hour ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
1 hour ago
|
show 2 more comments
$begingroup$
If the arrow points towards the base it is a PNP, if it points away from the base it is an NPN.
Further, the arrow will typically be on the more positive leg for PNP and negative for NPN.
answered 1 hour ago
evildemonicevildemonic
2,233720
$endgroup$
If the arrow points towards the base it is a PNP, if it points away from the base it is an NPN.
Further, the arrow will typically be on the more positive leg for PNP and negative for NPN.
answered 1 hour ago
evildemonicevildemonic
2,233720
edited 1 hour ago
answered 1 hour ago
evildemonicevildemonic
2,233720
answered 1 hour ago
evildemonicevildemonic
2,233720
answered 1 hour ago
evildemonicevildemonic
2,233720
2,233720
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
All but one....
$endgroup$
– evildemonic
1 hour ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
1 hour ago
|
show 2 more comments
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
All but one....
$endgroup$
– evildemonic
1 hour ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
1 hour ago
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
1 hour ago
$begingroup$
All but one....
$endgroup$
– evildemonic
1 hour ago
$begingroup$
All but one....
$endgroup$
– evildemonic
1 hour ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
1 hour ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
1 hour ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
1 hour ago
|
show 2 more comments
$begingroup$
This diagram should explain everything
Any additional questions?
answered 1 hour ago
G36G36
5,3901511
$endgroup$
add a comment |
$begingroup$
This diagram should explain everything
Any additional questions?
answered 1 hour ago
G36G36
5,3901511
$endgroup$
add a comment |
$begingroup$
This diagram should explain everything
Any additional questions?
answered 1 hour ago
G36G36
5,3901511
$endgroup$
This diagram should explain everything
Any additional questions?
answered 1 hour ago
G36G36
5,3901511
answered 1 hour ago
G36G36
5,3901511
answered 1 hour ago
G36G36
5,3901511
answered 1 hour ago
G36G36
5,3901511
5,3901511
add a comment |
add a comment |
Jimmy Vailer is a new contributor. Be nice, and check out our Code of Conduct.
Jimmy Vailer is a new contributor. Be nice, and check out our Code of Conduct.
Jimmy Vailer is a new contributor. Be nice, and check out our Code of Conduct.
Jimmy Vailer is a new contributor. Be nice, and check out our Code of Conduct.
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$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
1 hour ago
3
$begingroup$
I'm voting to close this question as off-topic because there is no evidence of effort to research this answer at all.
$endgroup$
– Andy aka
1 hour ago
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
1 hour ago
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
30 mins ago