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?
What's the difference between NPN and PNP transistors?Using an NPN vs a PNP transistorWhy are the current directions in the hybrid-$pi$ model for BJT the same for both NPN and PNP?Help with NPN and PNP common emitterApplying hybrid-pi model of an npn-BJT to a pnp BJT in small signal analysisWhat's the differences of these usage of PNP, NPN transistors?PNP and NPN Collector Emitter namingBJT NPN current flowHow do I implement a DPDT-switch here using NPN/PNP instead?PNP BJT small signal model
$begingroup$
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 2 hours ago
Jimmy VailerJimmy Vailer
335
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 2 hours ago
Jimmy VailerJimmy Vailer
335
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.
$endgroup$
1
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
2 hours ago
5
$begingroup$
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
2 hours ago
1
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
2 hours ago
1
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
1 hour 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 2 hours ago
Jimmy VailerJimmy Vailer
335
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 2 hours ago
Jimmy VailerJimmy Vailer
335
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 2 hours ago
Jimmy VailerJimmy Vailer
335
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 2 hours ago
Jimmy VailerJimmy Vailer
335
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 2 hours ago
Jimmy VailerJimmy Vailer
335
asked 2 hours ago
Jimmy VailerJimmy Vailer
335
335
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.
1
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
2 hours ago
5
$begingroup$
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
2 hours ago
1
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
2 hours ago
1
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
1 hour ago
add a comment |
1
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
2 hours ago
5
$begingroup$
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
2 hours ago
1
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
2 hours ago
1
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
1 hour ago
1
1
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
2 hours 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.
2 hours ago
5
5
$begingroup$
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
2 hours 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
2 hours ago
1
1
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
2 hours ago
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
2 hours ago
1
1
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
1 hour ago
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
1 hour 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 2 hours ago
MCGMCG
6,35631747
$endgroup$
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 2 hours ago
evildemonicevildemonic
2,233720
$endgroup$
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
2 hours ago
$begingroup$
All but one....
$endgroup$
– evildemonic
2 hours ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
2 hours ago
|
show 2 more comments
$begingroup$
This diagram should explain everything
Any additional questions?
answered 2 hours ago
G36G36
5,4001511
$endgroup$
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 2 hours ago
MCGMCG
6,35631747
$endgroup$
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 2 hours ago
MCGMCG
6,35631747
$endgroup$
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 2 hours ago
MCGMCG
6,35631747
$endgroup$
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 2 hours ago
MCGMCG
6,35631747
answered 2 hours ago
MCGMCG
6,35631747
answered 2 hours ago
MCGMCG
6,35631747
answered 2 hours ago
MCGMCG
6,35631747
6,35631747
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 2 hours ago
evildemonicevildemonic
2,233720
$endgroup$
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
2 hours ago
$begingroup$
All but one....
$endgroup$
– evildemonic
2 hours ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
2 hours 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 2 hours ago
evildemonicevildemonic
2,233720
$endgroup$
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
2 hours ago
$begingroup$
All but one....
$endgroup$
– evildemonic
2 hours ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
2 hours 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 2 hours 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 2 hours ago
evildemonicevildemonic
2,233720
edited 2 hours ago
answered 2 hours ago
evildemonicevildemonic
2,233720
answered 2 hours ago
evildemonicevildemonic
2,233720
answered 2 hours ago
evildemonicevildemonic
2,233720
2,233720
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
2 hours ago
$begingroup$
All but one....
$endgroup$
– evildemonic
2 hours ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
2 hours ago
|
show 2 more comments
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
2 hours ago
$begingroup$
All but one....
$endgroup$
– evildemonic
2 hours ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
2 hours ago
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
Thank you. So would those all be PNP?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
2 hours ago
$begingroup$
No. Look carefully.
$endgroup$
– Eugene Sh.
2 hours ago
$begingroup$
All but one....
$endgroup$
– evildemonic
2 hours ago
$begingroup$
All but one....
$endgroup$
– evildemonic
2 hours ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
Oh so c) (the first one) would be NPN because the arrow above the current source is pointing away?
$endgroup$
– Jimmy Vailer
2 hours ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
2 hours ago
$begingroup$
No. Look at the direction of the arrow with respect to the BASE of the transistor.
$endgroup$
– evildemonic
2 hours ago
|
show 2 more comments
$begingroup$
This diagram should explain everything
Any additional questions?
answered 2 hours ago
G36G36
5,4001511
$endgroup$
add a comment |
$begingroup$
This diagram should explain everything
Any additional questions?
answered 2 hours ago
G36G36
5,4001511
$endgroup$
add a comment |
$begingroup$
This diagram should explain everything
Any additional questions?
answered 2 hours ago
G36G36
5,4001511
$endgroup$
This diagram should explain everything
Any additional questions?
answered 2 hours ago
G36G36
5,4001511
answered 2 hours ago
G36G36
5,4001511
answered 2 hours ago
G36G36
5,4001511
answered 2 hours ago
G36G36
5,4001511
5,4001511
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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1
$begingroup$
Yes. Look at the location/direction of the arrow. That is really a question for your textbook or a search engine.
$endgroup$
– Eugene Sh.
2 hours ago
5
$begingroup$
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
2 hours ago
1
$begingroup$
A memory aid: emmiter arrow on an NPN is Not Pointing iN
$endgroup$
– Peter Bennett
2 hours ago
1
$begingroup$
Another memory aid that has stuck with me for a while: PNP is Pointing iNward Proudly
$endgroup$
– Andrey Akhmetov
1 hour ago