EGR203 Electric and Electronic Circuits Assignment 13

1. For the circuit shown below, answer the questions below. Assume that R_C = 1 kΩ, R_B = 10 kΩ, V_CC = 12 V, V_CE = 0.3 V at saturation, V_BE = 0.7 V, and β = 50.

   

   1. Find i_C if V_BB = 0.5 V.
   2. Find i_C if V_BB = 2.0 V.
   3. Find i_C if V_BB = 3.5 V.
   4. Find V_BB required to saturate the transistor.

2. The following circuit diagram applies to this problem. Let R₁ = 92 kΩ, R₂ = 46 kΩ, R_C = 4 kΩ, V_CC = 12 V, and β = 240.

   Find the saturation current i_Csat (when V_CE = 0.3 V). Then find the actual value of i_C and i_B. Is the transistor in the active region or the saturation region?

   

3. Given the following circuit, with R₁ = 200 kΩ, R₂ = 50 kΩ, R_C = 4 kΩ, and R_E = 1 kΩ. Assume V_CC = 15 V, V_BE = 0.7 V and the transistor β = 200. Find V_C, i_C, V_o, V_BB, and i_B.

   

4. Solve the previous problem in Multisim assuming first a 2N3904 transistor and then a 2N2222A transistor.

5. Given the following circuit, in which R_C = 3 kW, β = 80, V_BE = 0.7 V, V_CE = 8 V, and V_CC = 15 V. Find i_C and the value of R_B.

   

Maintained by John Loomis, last updated 11 November 2012