Practical Electronics/Voltage Divider
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Intro[edit | edit source]
A network of two resistors connected as shown
Analysis[edit | edit source]
- Vo = I R2
Formula[edit | edit source]
Choosing Value for R[edit | edit source]
- R2
- R2 = 0 , Vo = 0
- R2 >> R1 , Vo = Vi
- R1
- R1 = 0 , Vo = Vi
- R1 >> R2 , Vo = 0
- R1 = R2
- Vo = ½ Vi
- When R1 = R2 , the output voltage is exactly halved of the input voltage
Summary[edit | edit source]
There is no gain for this network, since Vo never greater than Vi .
This network can be used as Voltage Attenuator, Voltage Follower, Voltage Halved, or Voltage Ground
- When the value of R2 > R1, this network acts as Voltage Attenuator
- When the value of R2 = 0 or R1 >> R2, this network acts as Voltage Ground
- When the value of R1 = 0 or R1 << R2, this network acts as Voltage Follower
- When the value of R2 = R1 = R then this network acts as Voltage Halved