![]() ![]() At mid-band frequencies, measure A V, R IN, and R OUT.Ħ. Use the Bode Plotting instrument in the ALICE desktop software to obtain the magnitude of the frequency response of the amplifier from 50 Hz to as high as 20 KHz and determine the lower and upper 3- dB frequencies f L and f H.ĥ. If any DC bias value is significantly different than the one obtained from simulation, modify your circuit to get the desired DC bias before moving onto the next step.Ĥ. Check your DC operating point by measuring I C, V E, V C and V B. Remember that you can combine the standard values in series or parallel to get a combined value closer to your design number.Ģ. Based on your design values from the pre-Lab, use the closest standard value from your kit. Use the values you designed in the pre-lab. Be prepared to discuss your design at the beginning of the lab period with your TA. Simulate the circuit to verify your result, and adjust the values of capacitors if necessary.ħ. Calculate C B, C C, C E to have f L = 500 Hz. Simulate the circuit to verify your result, and adjust the value of C F if necessary.Ħ. Calculate the value of C F to have f H = 5 kHz. Remember that the equation gives you the radian frequency and you need to convert to Hz.ĥ. Calculate f H using the equation from section 1.3 and compare it with the simulation result obtained in Step 3. Determine Cp, Cµ and r b of the transistor from the simulated operating point data, (refer to your simulator's documentation on how to obtain operating point data). Using LTSpice, find the higher 3- dB frequency (f H) while C F = 0.Ĥ. Also provide the circuit schematic with DC bias points annotated.ģ. Submit all necessary simulation plots showing that the specifications are satisfied. Verify your results using the LTSpice circuit simulator. Show all your calculations, design procedure, and final component values.Ģ. Peak-to-peak unclipped output swing > 3 Vġ. Assuming C B = C C = C E = 1 Farad and C F = C Π = C µ = 0, and using a 2N3904 transistor, design a common-emitter amplifier with the following specifications: ![]()
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