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posted by  smak on 7/3/2009 10:20:03 PM  |  status: Closed  |  Earned Karma: 25

need help w/circuit

Course Textbook Chapter Problem Needs by
Digital Circuits N/A N/A N/A N/A
Question Details:
Switch is closed for a long time - Switch opens at t= 0s.
a - find expression of Vo(t) ,
Sketch Vo (t) for 5 time constants!!!!
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posted by Shree_vani(MNK) on 7/4/2009 12:51:39 AM  |  status: Live
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Response Details:
When the switch is closed for long time, the capacitor acts as open circuit ofr DC current, the circuit will be as shown below
Applying KCL at the node
Current through 1Ω
Voltage across 1Ω
Voltage across the open capacitor
When the switch is open at t=0
Applying KCL
i = i1 + i2
Using partial fraction method
\
Taking inverse laplace transform
Time constant
At t=5τ
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