Contents
What does a current source do?
A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it. A current source is the dual of a voltage source. The term current sink is sometimes used for sources fed from a negative voltage supply.
Can current flow through a current source?
Hence, that net must have the current as applied by the source, it doesn’t matter what’s on its way. So, in this case, the first source’s value must be equal to minus the second source value, so current can flow, otherwise this model is invalid.
Is there such a thing as an ideal current source?
An ideal current source has infinite parallel resistance connected to it. Therefore, the output current is independent of voltage of the source terminals. No such current source exists in the world, this is just a concept. However, every current source is designed to approach closer to the ideal one.
Modeling non-ideal sources requires thinking about Resistance and Ohm’s Law as well as how voltages and currents behave in a network, as governed by Kirchhoff’s Voltage Law and Kirchhoff’s Current Law. However, these models are closely related to ideal sources, so we’ll present them briefly here.
Why are series connected sources not allowed in circuit analysis?
Then series connected current sources add an unknown factor into circuit analysis, which is not good. Also, another reason why series connected sources are not allowed for circuit analysis techniques is that they may not supply the same current in the same direction. Series-aiding or series-opposing currents do not exist for ideal current sources.
What happens when there are more than one current sources?
If however there is more than one source, then the terminal voltage will be dependent upon the network in which the source is connected. Just like voltage sources, ideal current sources can also be connected together to increase (or decrease) the available current.