C7-activities - ACTIVITY 7-1 i R CCVS ACTIVITY 7-1 i R v +...

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1 ACTIVITY 7-1 v R i + C v6 i V o l t s = c Find expressions for i and v in terms of v and R CCVS ACTIVITY 7-1 v R i + C i V o l t s = KVL: 6i iR v 0 +−= vi ( R6 ) =− ACTIVITY 7-1 v R i + C i V o l t s = ( ) v i = Singularity at R 6 = Ω ACTIVITY 7-1 ± Note: Singularity at R = 6! ± Current Tries to “Blow Up” ² Interesting things can happen with controlled sources ± v c = 6 i = 6 v / (R - 6) ² CCVS tries to put out infinite voltage when R ~ 6 ohms ² What really happens is that circuit model fails at some point ACTIVITY 7-1 v R i + C i V o l t s = eq v RR 6 i ==− eq R0 a s R 6 →→ Ω eq R ( ) ACTIVITY 7-1 c eq R( ) 10 8 6 4 v (V) 30 60 60 i (A) 5 10 10 R ( ) 4 2 0 2 Ω ∞− Ω− For v 20 V: =
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2 ACTIVITY 7-2 TN T Find Thevenin Parameters v, i, R 4k Ω 12 k Ω x v + x 6v V +− v + i Replace everything to the left of the terminals with its Thevenin Equivalent Circuit 2 mA ACTIVITY 7-2 2 mA 4k Ω 12 k Ω x v + x i0 = oc v + oc T vv 4 0 V => = = − oc x x x KVL: v v 6v 5v =− = x v2 48 V =×= Let's Use Units of mA, k and V Ω
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C7-activities - ACTIVITY 7-1 i R CCVS ACTIVITY 7-1 i R v +...

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