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Q1:1. Let us plot the Shockley diode equation. Suppose you are required to use In () as the vertical axis and V as the horizontal axis. Plot the result qualitatively and correctly label relevant parameters, i.e. axis intercepts and polynomial coefficients. Between a forward bias of 0.65 V and 0.75 V, how much does In / increase?See Answer
Q2: Question 4: In the series-shunt feedback amplifier shown in Figure 3, the transistors are biased with ideal current-sources ₁ = 0.1 mA and I₂ = 0.1mA, the devices operate with VBE= 0.7V and ₁= B₂ = 120. The input signal V has a zero DC component. Resistances are R = 1000, R₁ = 1kN, R₂ = 10kN, R₁ = 1kN. b) Find the DC emitter current in each of Q1 and Q2 and the DC voltage at the emitter of Q2. c) Sketch the open-loop circuit without the DC sources. Derive expressions for A,Ri, and Ro, and find their values. [4 marks] d) Find the closed-loop gain Aƒ = V/V, the input resistance Rin, the output resistance Rout. a) If the open loop gain is large, what do you expect the closed-loop gain Af = V₁/V₂ to be? Give both an expression and its approximate value.See Answer
Q3: Question 5: Figure 5 shows a feedback trans-conductance amplifier implemented using an op amp with open-loop gain µ, a very large input resistance, and an output resistance r.. The output current I that is delivered to the load resistance RL is sensed by the feedback network composed of the three resistances RM, R¹, and R2, and a proportional voltage Vf is fed back to the negative input terminal of the op amp. a) Find the expression for A, = 1/V₂. b) If the loop gain is large, find an approximate expression for A, and state the condition for which this applies. See Answer
Q4:Given is an Operational Amplifier, having the following Bias Currents: IB1 =1uA and IB2 = 1.5μA Determine the Input Offset Current, give your result in microamps (μA) and write your answer without the unit (i.e. if the answer were 1.5μA, write 1.5)See Answer
Q5:QUESTION 3 Given is an Operational Amplifier, having the following Bias Currents: IB1=1uA and IB2 = 1.5µA Determine the Input Bias Current, give your result in microamps (µA) and write your answer without the unit (i.e. if the answer were 1.5μA, write 1.5)See Answer
Q6:R₁ = 10K R₂ = 100K IB1 = IB2 =1μA Determine Vo for V-0. give your result in Volt and write your answer without the unit.See Answer
Q7:Assume that R₁ = 22K and R₂ = 100K. Determine R3 so that the OpAmp is Input Bias compensated for the case IB1= IB2. Give your answer in Ohms and write your answer without the unit.See Answer
Q8:Given is an operational Amplifier with the following parameters: Differential-Mode Gain (aka open-loop gain) Ad = 100000 Common-Mode Gain Acm =10 Determine the Common Mode Rejection Ratio CMRR in dB.See Answer
Q9:Determine the cutoff frequency in Hz and write your answer without the unit.See Answer
Q10:Given is a first-order low-pass filter. What is the phase of the output voltage at the cutoff frequency? Give your answer in degrees and write your answer without the unit.See Answer
Q11:Given is a first-order low-pass filter with a DC gain of 1 (0dB). Determine the magnitude of the gain at the cutoff frequency, give your answer in dB and write your answer without the unit.See Answer
Q12:Given is a first-order low-pass filter. Determine the magnitude of the gain at the transit frequency, give your answer in dB, and write your answer without the unit.See Answer
Q13:Given is an OpAmp with the following parameters: Aol = 10^5 GBWP = 1MHz Determine the frequency of the dominant pole, give your answer in HZ, and write your answer without the unit.See Answer
Q14:Given is an OpAmp with the following parameters: Aol = 10^6 GBWP =10MHz Thsi OpAmp is used in a closed-loop configuration with a B=0.1. What is the cutoff frequency of the closed-loop amplifier, give your answer in Hz, and write your answer without the unit.See Answer
Q15:Given is an OpAmp which is connect to a square-wave generator. The output voltage of the OpAmp follows a first-order response, and the rise-time is measured to be 1us. Determine the cut-off frequency, give you answer in Hz, and write your answer without the unit.See Answer
Q16:Given is an OpAmp where the internal current source for biasing is known as well as the capacitor used for frequency compensation. IQ = 19μA C = 30pF determine the slew-rate in V/us and write your answer without the unit.See Answer
Q17:Given is an UpAmp with the following parameters: fT = 1MHz Acl = 10 (at DC) SR = 1V/us desired peak output voltage Vpo= 10V Determine the full-power bandwidth, based on the slew-rate limitation. Give your answer in Hz and write your answer without the unit.See Answer
Q18:1. Assuming Ideal op amp, Find the voltage gain Vo/Vi of each of the circuits in Figure below.See Answer
Q19:Below is a passive filter circuit shown in figure Q2. For the following parts, include all calculations and equations used. Component values are: R1 = 1 KQ, R2 = 3300, R3=1.8 KQ, R4 = 2700, R5= 6600, C1= 10nF, C2 = 0.01μF, C3 = 20nF. a) Identify what the cut off frequency of the circuit is. (10 marks) b) What is the roll-off or slope for this circuit in the stop band and why? (6 marks) c) Vin If R5 was not correctly placed in the breadboard and fell out of the breadboard completely, would the cut off frequency increase or decrease, justify your decision? (4 marks) C1 H C3 C2 HH R1 R2 R3 R4 GND Figure Q2. Passive filter circuit R5 V outSee Answer
Q20:Q3 (15 marks) a) Examine the OpenChoice screenshot in figure Q3a, using the volts per division method, calculate the amplitude of both waveforms. Using the time per division method, calculate the frequency of both waveforms. (6 marks) 1.00V 2 50.0mV 2 M 100us M.Pos: 0.000s Figure Q3a. A screenshot of two sinusoidal waveforms using a DSO./nb) Examine the circuit in Q3b. This image shows an Op-Amp. What is the gain in dB of this circuit when R1 is 10 k and RF is 15 kQ. (5 marks) 9V Vin R1 GND 5 2 GND RF Figure Q3b. An Op Amp in a circuit. c) What is the output voltage when the input voltage is: a. 1.5V DC (2 marks) b. 5V DC (2 marks) VoutSee Answer

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