What is the difference between a voltage source and a current source. Battery is a voltage source, i guess. Any example of a current source?
MIT 6.002 Circuits and Electronics, Spring 2007
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A current source varies the output voltage to maintain the desired current.
A voltage source has a constant output regardless of the current draw
A Van de Graaff generator is an example of a high voltage current source.
The Van de Graaff generator can be thought of as a constant-current source connected in parallel with a capacitor and a very large electrical resistance.
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above is a schematic view of classical van_de_graaff_generator
Ok, but what is the practical use of a current source? What type of circuits needs a constant current source?
A current source is an electrical or electronic device that delivers or absorbs electric current. A current source is the dual of a voltage source.
Amplifiers circuits need dependent/in dependentent current sources .(vccs.cccs,etc)!!!!