Question 1 [30%] For the circuit shown in Figure 1. Vs1 is a sinusoidal signal of a peak amplitude of 200mV and frequency of 1KHz. VCC 20V R4 R2122 Rs1 C1 HE 5.6F Q2 2N 3906 60002 Vs1 C2 R1384k92 1kHz 0° 5.64F R36k802 RL1 2k7Ω Figure 1. Audio preamplifier For the circuit in Figure 1: 1. Find the value of R4 for a voltage gain value of approx. 25. 2. Calculate the DC operating point. 3. Calculate the theoretical Av', Av, Vopp, Vce,q, Ica, re', Rinbase, Rin, total- 4. Calculate the circuit power dissipation with no signal (quiescent). Simulate the preamp in Figure 1. [4%) (7%) (7%) [4%) 5. Find the DC operating point of the transistor and the quiescent power dissipation (2%] 6. Determine the voltage gain of the simulated circuit based on the voltage measurements. Compare it against the theoretical results in section 2. (3%) 7. Determine the frequency response of Av' and Av using circuit simulation tools. [3%]
Question 2 [70%) (15%) (5%) Determine the output voltage of the opamp circuit in Figure 1. Simulate the circuit in Multisim and determine the output voltage. R3 w 10kΩ R4 10kΩ R2 w 20kΩ 11 R1 5mA 5kΩ U1 vo + Figure 1. Determine the ratio voli, in the opamp circuit of Figure 2. (15%) Find the output voltage [5%] R3 R1 w 20kΩ R2 40k_2 25kΩ U1 į ( + 50uA VO Figure 2.
A noninverting current amplifier is shown in Figure 3. Find the gain i, li, (20%) [5%] Find the voltage in the non-inverting input. Simulate the circuit in Multisim and find the power dissipated in R3 (5%) U1 - + M R2 1kΩ R1 w 8kΩ i iolla R3 1kΩ 100uA Figure 3.
Question 1 [30%] For the circuit shown in Figure 1. Vs1 is a sinusoidal signal of a peak amplitude of 200mV and frequenc
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Question 1 [30%] For the circuit shown in Figure 1. Vs1 is a sinusoidal signal of a peak amplitude of 200mV and frequenc
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