<^< Current Divider | Course Index | Passive Time Variant Circuits >^>
Objective:
| To investigate the action of a Current divider circuit.
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Underpinning knowledge:
| Resistance. Resistors in parallel. Kirchhoff's Current Law.
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Apparatus:
| TINA circuit file, or apparatus to make the following circuit.
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TINA Circuit File:
| Click here to download circuit file
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Initial Settings:
| R1 = 1kΩ, R2 = 4kΩ.
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Requires:
| Paper, Linear graph paper, pen or pencil.
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Instructions:
(a) Using initial settings verify that IOUT = IIN x R1/(R1+R2).
(b) Change R1 to 2kΩ and R2 to 3kΩ.
(c) Again check that IOUT = IIN x R1/(R1+R2).
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Observations:
Confirm that, in each case, the output current is the input current multiplied by the ratio of R1 to (R1 + R2).
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Further work:
(a) Devise a current divider arrangement that would drop a potential of 0.5V and produce a precise output current of precisely 0.1A from an input current of 2A. Check your answer using your circuit simulation software.
(b) The output current produced by a current divider arrangement will fall when the circuit is loaded (i.e. when a load resistance is connected to it). Investigate the effect on the output current of your current divider when connected to load resistance's of 0.1kΩ, 0.5kΩ, 1kΩ, 5kΩ and 10kΩ.
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