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ECE 4-1-2 - V_A c Power_D2 = Power_D3 = I_D2 VD2 = 1.85 mW...

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1) D1 on D2 off D3 off T1 Cutoff --> Current only flows through D1, R1 since D2, D3 = open circuit a) Current: - Ohms law to find VA (VA = 0.9V) - OHms law to find I_R1 (I_R1 = I_D1 = 3.73 mA) b) Power_D1 = I_D1 * V_D1 = 2.61 mW c) Power_R1 = I_R1^2 * R1 = use correct units = 15.282 mW d) Power_D2 = Power_D3 = Power_T1 = Power_R2 = 0 ( No current ) 2) D1 off D2 on D3 on T1 Saturated --> Current does not flow through D1 a) V_A = V_BE(on) + VD2+ VD3 = .7 + .7 + .7 = 2.1V b) i_B = i_R1 = i_D2 = i_D3 = 2.64mA --> Ohms Law with

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Unformatted text preview: V_A c) Power_D2 = Power_D3 = I_D2 * VD2 = 1.85 mW d) Power_R2:- Use Ohm's Law to find i_R2: V1 - V_CE = i_R2*R2 = 10.213 mA = i_C- Power_R2 = (i_R2)^2 * R2 {Remember units} = 49.0213 mW e) Power for npn = Power_T1 = i_B * V_BE + i_C * V_CE = (2.64mA) * (0.7V) + (10.213mA) * (0.2V) = 3.89mW f) Power_R1 = (i_R1)^2 * R1 {Remember units} = 7.66 mW g) Power_D1 = 0 ( No current ) Power for npn:i_B * V_BE + i_C * V_CE Power for pnp: i_B*V_CE + i_C * V_BE...
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ECE 4-1-2 - V_A c Power_D2 = Power_D3 = I_D2 VD2 = 1.85 mW...

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