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Dependent voltage/current sources
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Dependent voltage/current sources
What are the usual types of loss sources in an Inverter?Does current have a physical effect on wire?How to mitigate voltage spikes when turning car ON?Joining high current wiresVoltage Drop Calculation (AC)why does current like circulating?USB Bus Powered with LDO device exampleWhat is the current drawn by a faulty appliance?How current is steady after pinch off voltage?shorting method of current source and voltage source
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
$begingroup$
I'm so sorry for that questions, but we need to understand what's going on behind the concept/theoretical of using device "dependent voltage/current source"!
My question: Yes, we are using dependent voltage/current source, but is there a device like this in real life? If so, let's assume that at branch k there's voltage k, my dependent voltage source is at branch k + 5 in the circuit, so how does my dependent voltage source knows the voltage at branch k? theoretically we say just assigning it once we find it .. but how it's going behind?!
electrical
edited 8 hours ago
Transistor
93k788203
asked 8 hours ago
Tony.MTony.M
61
New contributor
Tony.M 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 |
$begingroup$
I'm so sorry for that questions, but we need to understand what's going on behind the concept/theoretical of using device "dependent voltage/current source"!
My question: Yes, we are using dependent voltage/current source, but is there a device like this in real life? If so, let's assume that at branch k there's voltage k, my dependent voltage source is at branch k + 5 in the circuit, so how does my dependent voltage source knows the voltage at branch k? theoretically we say just assigning it once we find it .. but how it's going behind?!
electrical
edited 8 hours ago
Transistor
93k788203
asked 8 hours ago
Tony.MTony.M
61
New contributor
Tony.M is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
$begingroup$
We can treat the BJT's or a MOSFET' as a VCCS. Or we can use an opamp to create any you like.
$endgroup$
– G36
8 hours ago
$begingroup$
Look up Howland Current source. Notice the input voltage can regulate the current as long as the load resistance does not result in a voltage exceeding the supply rails. Due to high open loop voltage gain and feedback, it works over a very wide range.
$endgroup$
– Sunnyskyguy EE75
8 hours ago
1
$begingroup$
The real power of dependent sources isn't that you can make them (you can), but that you can use them in small-signal circuit analysis in a way that makes all sorts of circuit elements (like transistors) easier to work with.
$endgroup$
– TimWescott
7 hours ago
$begingroup$
Typically dependent voltage/current sources in real life are probably things that contain various components. So if you have an dependent voltage source, for an example, of $5V_in$, it means that you have to design a circuit that will give an output that is five times large than your input voltage.
$endgroup$
– KingDuken
7 hours ago
add a comment |
$begingroup$
I'm so sorry for that questions, but we need to understand what's going on behind the concept/theoretical of using device "dependent voltage/current source"!
My question: Yes, we are using dependent voltage/current source, but is there a device like this in real life? If so, let's assume that at branch k there's voltage k, my dependent voltage source is at branch k + 5 in the circuit, so how does my dependent voltage source knows the voltage at branch k? theoretically we say just assigning it once we find it .. but how it's going behind?!
electrical
edited 8 hours ago
Transistor
93k788203
asked 8 hours ago
Tony.MTony.M
61
New contributor
Tony.M is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I'm so sorry for that questions, but we need to understand what's going on behind the concept/theoretical of using device "dependent voltage/current source"!
My question: Yes, we are using dependent voltage/current source, but is there a device like this in real life? If so, let's assume that at branch k there's voltage k, my dependent voltage source is at branch k + 5 in the circuit, so how does my dependent voltage source knows the voltage at branch k? theoretically we say just assigning it once we find it .. but how it's going behind?!
electrical
electrical
edited 8 hours ago
Transistor
93k788203
asked 8 hours ago
Tony.MTony.M
61
New contributor
Tony.M is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 8 hours ago
Transistor
93k788203
asked 8 hours ago
Tony.MTony.M
61
New contributor
Tony.M is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 8 hours ago
Transistor
93k788203
edited 8 hours ago
Transistor
93k788203
edited 8 hours ago
Transistor
93k788203
93k788203
asked 8 hours ago
Tony.MTony.M
61
New contributor
Tony.M is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 hours ago
Tony.MTony.M
61
asked 8 hours ago
Tony.MTony.M
61
61
New contributor
Tony.M is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Tony.M is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$begingroup$
We can treat the BJT's or a MOSFET' as a VCCS. Or we can use an opamp to create any you like.
$endgroup$
– G36
8 hours ago
$begingroup$
Look up Howland Current source. Notice the input voltage can regulate the current as long as the load resistance does not result in a voltage exceeding the supply rails. Due to high open loop voltage gain and feedback, it works over a very wide range.
$endgroup$
– Sunnyskyguy EE75
8 hours ago
1
$begingroup$
The real power of dependent sources isn't that you can make them (you can), but that you can use them in small-signal circuit analysis in a way that makes all sorts of circuit elements (like transistors) easier to work with.
$endgroup$
– TimWescott
7 hours ago
$begingroup$
Typically dependent voltage/current sources in real life are probably things that contain various components. So if you have an dependent voltage source, for an example, of $5V_in$, it means that you have to design a circuit that will give an output that is five times large than your input voltage.
$endgroup$
– KingDuken
7 hours ago
add a comment |
$begingroup$
We can treat the BJT's or a MOSFET' as a VCCS. Or we can use an opamp to create any you like.
$endgroup$
– G36
8 hours ago
$begingroup$
Look up Howland Current source. Notice the input voltage can regulate the current as long as the load resistance does not result in a voltage exceeding the supply rails. Due to high open loop voltage gain and feedback, it works over a very wide range.
$endgroup$
– Sunnyskyguy EE75
8 hours ago
1
$begingroup$
The real power of dependent sources isn't that you can make them (you can), but that you can use them in small-signal circuit analysis in a way that makes all sorts of circuit elements (like transistors) easier to work with.
$endgroup$
– TimWescott
7 hours ago
$begingroup$
Typically dependent voltage/current sources in real life are probably things that contain various components. So if you have an dependent voltage source, for an example, of $5V_in$, it means that you have to design a circuit that will give an output that is five times large than your input voltage.
$endgroup$
– KingDuken
7 hours ago
$begingroup$
We can treat the BJT's or a MOSFET' as a VCCS. Or we can use an opamp to create any you like.
$endgroup$
– G36
8 hours ago
$begingroup$
We can treat the BJT's or a MOSFET' as a VCCS. Or we can use an opamp to create any you like.
$endgroup$
– G36
8 hours ago
$begingroup$
Look up Howland Current source. Notice the input voltage can regulate the current as long as the load resistance does not result in a voltage exceeding the supply rails. Due to high open loop voltage gain and feedback, it works over a very wide range.
$endgroup$
– Sunnyskyguy EE75
8 hours ago
$begingroup$
Look up Howland Current source. Notice the input voltage can regulate the current as long as the load resistance does not result in a voltage exceeding the supply rails. Due to high open loop voltage gain and feedback, it works over a very wide range.
$endgroup$
– Sunnyskyguy EE75
8 hours ago
1
1
$begingroup$
The real power of dependent sources isn't that you can make them (you can), but that you can use them in small-signal circuit analysis in a way that makes all sorts of circuit elements (like transistors) easier to work with.
$endgroup$
– TimWescott
7 hours ago
$begingroup$
The real power of dependent sources isn't that you can make them (you can), but that you can use them in small-signal circuit analysis in a way that makes all sorts of circuit elements (like transistors) easier to work with.
$endgroup$
– TimWescott
7 hours ago
$begingroup$
Typically dependent voltage/current sources in real life are probably things that contain various components. So if you have an dependent voltage source, for an example, of $5V_in$, it means that you have to design a circuit that will give an output that is five times large than your input voltage.
$endgroup$
– KingDuken
7 hours ago
$begingroup$
Typically dependent voltage/current sources in real life are probably things that contain various components. So if you have an dependent voltage source, for an example, of $5V_in$, it means that you have to design a circuit that will give an output that is five times large than your input voltage.
$endgroup$
– KingDuken
7 hours ago
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
A voltage/current depending source in real life needs to be built from actual electronic components. Usually made from operational amplifiers or transistors. They vary a bit from the ideal voltage/current sources in that they:
- Don't have infinite voltage/current and have finite power
- Usually have small offsets
- Have source impedance
- Have bandwidth or slew rate (can't source/sink current infinitely fast)
Here are some ways these circuits can be built in the real world:
B and C are voltage dependent current sources
An op amp in a voltage follower configuration is a voltage controlled voltage source.
Source: https://www.maximintegrated.com/en/app-notes/index.mvp/id/3869
answered 8 hours ago
laptop2dlaptop2d
32k123898
$endgroup$
$begingroup$
Low current opamps such as this are a great example of what can be designed. Note here that all the examples are voltage controlled current sources ….not just B and C. It's also worth noting that you can only implement this type of CC source where you have a single opamp in the package since you are using the +/- supplies as in circuit points.
$endgroup$
– Jack Creasey
7 hours ago
add a comment |
$begingroup$
They exist but are circuits unto themselves so you abstract them away as singular components during circuit analysis so you don't get overwhelmed. Being circuits, they have to hook into other parts of the circuit you are dependent on to monitor things which isn't shown so you don't get overwhelmed.
It's no different from how you might draw an op-amp symbol, a current source symbol, or a voltage source symbol in your circuit when in reality that symbol represents an entire circuit (which might be more complicated than the circuit you just placed the symbol in).
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
$endgroup$
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
A voltage/current depending source in real life needs to be built from actual electronic components. Usually made from operational amplifiers or transistors. They vary a bit from the ideal voltage/current sources in that they:
- Don't have infinite voltage/current and have finite power
- Usually have small offsets
- Have source impedance
- Have bandwidth or slew rate (can't source/sink current infinitely fast)
Here are some ways these circuits can be built in the real world:
B and C are voltage dependent current sources
An op amp in a voltage follower configuration is a voltage controlled voltage source.
Source: https://www.maximintegrated.com/en/app-notes/index.mvp/id/3869
answered 8 hours ago
laptop2dlaptop2d
32k123898
$endgroup$
$begingroup$
Low current opamps such as this are a great example of what can be designed. Note here that all the examples are voltage controlled current sources ….not just B and C. It's also worth noting that you can only implement this type of CC source where you have a single opamp in the package since you are using the +/- supplies as in circuit points.
$endgroup$
– Jack Creasey
7 hours ago
add a comment |
$begingroup$
A voltage/current depending source in real life needs to be built from actual electronic components. Usually made from operational amplifiers or transistors. They vary a bit from the ideal voltage/current sources in that they:
- Don't have infinite voltage/current and have finite power
- Usually have small offsets
- Have source impedance
- Have bandwidth or slew rate (can't source/sink current infinitely fast)
Here are some ways these circuits can be built in the real world:
B and C are voltage dependent current sources
An op amp in a voltage follower configuration is a voltage controlled voltage source.
Source: https://www.maximintegrated.com/en/app-notes/index.mvp/id/3869
answered 8 hours ago
laptop2dlaptop2d
32k123898
$endgroup$
$begingroup$
Low current opamps such as this are a great example of what can be designed. Note here that all the examples are voltage controlled current sources ….not just B and C. It's also worth noting that you can only implement this type of CC source where you have a single opamp in the package since you are using the +/- supplies as in circuit points.
$endgroup$
– Jack Creasey
7 hours ago
add a comment |
$begingroup$
A voltage/current depending source in real life needs to be built from actual electronic components. Usually made from operational amplifiers or transistors. They vary a bit from the ideal voltage/current sources in that they:
- Don't have infinite voltage/current and have finite power
- Usually have small offsets
- Have source impedance
- Have bandwidth or slew rate (can't source/sink current infinitely fast)
Here are some ways these circuits can be built in the real world:
B and C are voltage dependent current sources
An op amp in a voltage follower configuration is a voltage controlled voltage source.
Source: https://www.maximintegrated.com/en/app-notes/index.mvp/id/3869
answered 8 hours ago
laptop2dlaptop2d
32k123898
$endgroup$
A voltage/current depending source in real life needs to be built from actual electronic components. Usually made from operational amplifiers or transistors. They vary a bit from the ideal voltage/current sources in that they:
- Don't have infinite voltage/current and have finite power
- Usually have small offsets
- Have source impedance
- Have bandwidth or slew rate (can't source/sink current infinitely fast)
Here are some ways these circuits can be built in the real world:
B and C are voltage dependent current sources
An op amp in a voltage follower configuration is a voltage controlled voltage source.
Source: https://www.maximintegrated.com/en/app-notes/index.mvp/id/3869
answered 8 hours ago
laptop2dlaptop2d
32k123898
answered 8 hours ago
laptop2dlaptop2d
32k123898
answered 8 hours ago
laptop2dlaptop2d
32k123898
answered 8 hours ago
laptop2dlaptop2d
32k123898
32k123898
$begingroup$
Low current opamps such as this are a great example of what can be designed. Note here that all the examples are voltage controlled current sources ….not just B and C. It's also worth noting that you can only implement this type of CC source where you have a single opamp in the package since you are using the +/- supplies as in circuit points.
$endgroup$
– Jack Creasey
7 hours ago
add a comment |
$begingroup$
Low current opamps such as this are a great example of what can be designed. Note here that all the examples are voltage controlled current sources ….not just B and C. It's also worth noting that you can only implement this type of CC source where you have a single opamp in the package since you are using the +/- supplies as in circuit points.
$endgroup$
– Jack Creasey
7 hours ago
$begingroup$
Low current opamps such as this are a great example of what can be designed. Note here that all the examples are voltage controlled current sources ….not just B and C. It's also worth noting that you can only implement this type of CC source where you have a single opamp in the package since you are using the +/- supplies as in circuit points.
$endgroup$
– Jack Creasey
7 hours ago
$begingroup$
Low current opamps such as this are a great example of what can be designed. Note here that all the examples are voltage controlled current sources ….not just B and C. It's also worth noting that you can only implement this type of CC source where you have a single opamp in the package since you are using the +/- supplies as in circuit points.
$endgroup$
– Jack Creasey
7 hours ago
add a comment |
$begingroup$
They exist but are circuits unto themselves so you abstract them away as singular components during circuit analysis so you don't get overwhelmed. Being circuits, they have to hook into other parts of the circuit you are dependent on to monitor things which isn't shown so you don't get overwhelmed.
It's no different from how you might draw an op-amp symbol, a current source symbol, or a voltage source symbol in your circuit when in reality that symbol represents an entire circuit (which might be more complicated than the circuit you just placed the symbol in).
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
$endgroup$
add a comment |
$begingroup$
They exist but are circuits unto themselves so you abstract them away as singular components during circuit analysis so you don't get overwhelmed. Being circuits, they have to hook into other parts of the circuit you are dependent on to monitor things which isn't shown so you don't get overwhelmed.
It's no different from how you might draw an op-amp symbol, a current source symbol, or a voltage source symbol in your circuit when in reality that symbol represents an entire circuit (which might be more complicated than the circuit you just placed the symbol in).
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
$endgroup$
add a comment |
$begingroup$
They exist but are circuits unto themselves so you abstract them away as singular components during circuit analysis so you don't get overwhelmed. Being circuits, they have to hook into other parts of the circuit you are dependent on to monitor things which isn't shown so you don't get overwhelmed.
It's no different from how you might draw an op-amp symbol, a current source symbol, or a voltage source symbol in your circuit when in reality that symbol represents an entire circuit (which might be more complicated than the circuit you just placed the symbol in).
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
$endgroup$
They exist but are circuits unto themselves so you abstract them away as singular components during circuit analysis so you don't get overwhelmed. Being circuits, they have to hook into other parts of the circuit you are dependent on to monitor things which isn't shown so you don't get overwhelmed.
It's no different from how you might draw an op-amp symbol, a current source symbol, or a voltage source symbol in your circuit when in reality that symbol represents an entire circuit (which might be more complicated than the circuit you just placed the symbol in).
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
answered 8 hours ago
DKNguyenDKNguyen
3,5421422
3,5421422
add a comment |
add a comment |
Tony.M is a new contributor. Be nice, and check out our Code of Conduct.
Tony.M is a new contributor. Be nice, and check out our Code of Conduct.
Tony.M is a new contributor. Be nice, and check out our Code of Conduct.
Tony.M is a new contributor. Be nice, and check out our Code of Conduct.
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$begingroup$
We can treat the BJT's or a MOSFET' as a VCCS. Or we can use an opamp to create any you like.
$endgroup$
– G36
8 hours ago
$begingroup$
Look up Howland Current source. Notice the input voltage can regulate the current as long as the load resistance does not result in a voltage exceeding the supply rails. Due to high open loop voltage gain and feedback, it works over a very wide range.
$endgroup$
– Sunnyskyguy EE75
8 hours ago
1
$begingroup$
The real power of dependent sources isn't that you can make them (you can), but that you can use them in small-signal circuit analysis in a way that makes all sorts of circuit elements (like transistors) easier to work with.
$endgroup$
– TimWescott
7 hours ago
$begingroup$
Typically dependent voltage/current sources in real life are probably things that contain various components. So if you have an dependent voltage source, for an example, of $5V_in$, it means that you have to design a circuit that will give an output that is five times large than your input voltage.
$endgroup$
– KingDuken
7 hours ago