Virtual ground
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Virtual ground

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This presentation has the details about the Virtual Ground

This presentation has the details about the Virtual Ground

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Virtual ground Virtual ground Presentation Transcript

  •  
  • Introduction
    • A virtual ground is no more than a voltage divider where the divided network is the ground and the outer of the network are connected to the + & - of the single source of energy.
    • Virtual ground is a point in a circuit which is at ground potential (0 volts) but is NOT connected to ground . 
  • Virtual Ground
  • Virtual Ground circuit
  • Virtual Ground Circuit 1
  • Circuit 1
    • In this circuit V1 (the left-hand battery) supplies +10 volts to the circuit while V2 (the right-hand battery) supplies -10 volts to the circuit.
    • The total difference in potential in the circuit is 20 volts .
  • Total Resistance of the circuit
    • The total resistance of the circuit can be calculated:
  • Total Current of the circuit
    • The total resistance of the circuit can be calculated:
  • Voltage drop across the R1
    • The voltage drop across R1 can be computed:
  • Voltage drop across the R2
    • To check this result, compute the voltage drop across R2 and subtract this from the voltage at point A .
    • The result should be the voltage of V2 .
  • Voltage at point A
    • The voltage at point A would be equal to the voltage of V1 minus the voltage drop of R1 .
    • It is not necessary that the voltage supplies be equal to create a point of virtual ground .
    Voltage of the circuit
  • Virtual Ground Circuit 2
  • Total Resistance
    • In this circuit V1 supplies +1 volt to the circuit while V2 supplies -10 volts.
    • The total difference in potential is 11 volts .
    • The total resistance of this circuit (R1 + R2) is 11 ohms .
  • Voltage drop
    • The total current (I T ) is 1 ampere .
    • The voltage drop across R1 (E  R1  = R 1  X I T ) is 1 volt .
    • The voltage drop across R2 (E R2  = R2 X I  T ) is 10 volts .
  • Voltage at point A
    • The voltage at point A can be computed:
  • Voltage at V2
    • So point A is at virtual ground in this circuit also.
    • To check the results, compute the voltage at V2 .
  • The End
    • …… . Thank You ……..