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Quiz-11 Spring 2018 Problem: The circuit shown is the AC equivalent of a Br CB amplifier....
Problem 2: The circuit shown is the AC equivalent circuit of a CC amplifier. The parameters...
Problem 2: The circuit shown is the AC equivalent circuit of a CC amplifier. The parameters for the BJI are β-100, r.-2.5 KOhms, VT-25 mV, and Va very large. A) Find the input impedance Rin and the output impedance Rout as indicated. B) Find the voltage gain A. /vC) Find Ic, the DC biasing current? RE2.5 P,
Please solve this Question Figure Q4 shows a common-source amplifier. Construct the ac equivalent circuit, then apply M...
Please solve this Question
Figure Q4 shows a common-source amplifier. Construct the ac equivalent circuit, then apply Miller's Theorem and hence show that the voltage gain is given as: where J-is the voltage gain bandwidth. R, = RD //RL and C-C,, + (I + g.Rjcgd」 State clearly any approximations or assumptions used in your analysis. The parameters above are defined as follows: gm is the transistor transconductance, Ce and Cet are the internal capacitances between the gate/source and gate/drain respectively...
4. For the amplifier in the figure below use the parameters in the table: +Vcc Re VBE- 0.7V, Ri- ...
4. For the amplifier in the figure below use the parameters in the table: +Vcc Re VBE- 0.7V, Ri- 1002, R1-160k2, R2-320k2 R3-200k2, R6-40 k2, Rc-60k2, Vcc- 12V, Ry Do a) Draw the DC equivalent circuit and calculate the Q-point. c) Draw the AC equivalent circuit with the small signal model for the transistor. d) Calculate the voltage gain, Av-Vo/vi. Assume ro infinite. e) Draw the circuit to find the amplifier input resistance (Rin). Calculate Rin f Draw the circuit...
2) (40) Assume that the FET is saturated in the amplifier circuit below. (a) Draw the...
2) (40) Assume that the FET is saturated in the amplifier circuit below. (a) Draw the ac equivalent circuit for ro 00, (b) Find the ac voltage gain (vo/w) for ro = 00, (c) Draw the ac equivalent circuit for a finite ro. (d) Find the ac voltage gain (Vo/vi) for a finite ro Ay for ro Av for finite ro Rp FDD
QUESTION 7 Following circuit is the small-signal equivalent circuit of a common-emitter amplifier. Assume Ri 10...
QUESTION 7 Following circuit is the small-signal equivalent circuit of a common-emitter amplifier. Assume Ri 10 kn, RB - 93 KO, RL - 8.5 kn. Small signal parameters are gm = 100 m, 5k and ro - 10 kn. Calculate the voltage gain Avvo/ Re & m} ube gmbe 3 ro " vo
Q6. An amplifier circuit using an n-MOSFET is shown in Fig. Q6. The n-MOSFET has the...
Q6. An amplifier circuit using an n-MOSFET is shown in Fig. Q6. The n-MOSFET has the following parameters: K'-1 mA/V2 and λ-0.02 w. v°' is a small signal AC voltage ource 8V 8V Vout Ra 2.56 mA Fig. Q6 (a) Calculate the DC gate voltage, Va. (b) Assuming that the n-MOSFET is operating in the saturation region and neglecting channel length modulation, calculate the threshold voltage, VrHN, given that the voltage drop across the de current sorce, Inas, has been...
Q1. For the cascade amplifier circuit shown in Fig (1): a) What are the functions of the capacitors C, C2 and C3? And w...
Q1. For the cascade amplifier circuit shown in Fig (1): a) What are the functions of the capacitors C, C2 and C3? And what are the functions of the capacitors Cs and CE? b) What are the functions of the resistors RD and Rc? c) Draw the DC biasing circuits for each stage. d) Find loa, VGsa, VDs and gm for the JFET stage (you may use either mathematical or graphical methods) e) Calculate l, Ic, le and Ve for...
QUESTION5 The small-signal ac equivalent cireuit of a transistor amplifier with collector feedback is shown in...
QUESTION5 The small-signal ac equivalent cireuit of a transistor amplifier with collector feedback is shown in the figure below. Assume the following circuit values: B- 200, re" i i o. RF-180 kn. Rc" 2.7 ?, RO-3.3 ?, ??-?2 = 10 ?? If the input voltage Vi-5 co (90 t) mv. determine the magnitude of the steady-state ac output voltage Vo (in mV), across the output load resistor Ro. Hint: Use node analysis to find the output node voltage, and note...
1.) 120 pointsl The parameters of n-channel enhancement MOSFET in the amplifier circuit below are...
1.) 120 pointsl The parameters of n-channel enhancement MOSFET in the amplifier circuit below are: 2.042 mA/V2, 1 Val ½ 2.4 V, Kn 150 V a.) Find quiescent values: drain current i, gate-to-source voltage vGs, and drain-to-source voltage vDs b.) Determine AC model parameters: gm and ro c.) Determine amplifier model parameters: Ri, Ro and Avo d) Determine the output voltage Vl across the load RL ǐfv, 1 mYn +VDD GI〈 R ls R Mi RL
1.) 120 pointsl The...
Problem 2 In the CS amplifier circuit below, the input signal vois coupled to the gate...
Problem 2 In the CS amplifier circuit below, the input signal vois coupled to the gate through a very large capacitor (shown as infinite). The transistor source is connected to ground at signal frequencies via a very large capacitor. The output voltage signal that develops at the drain is coupled to a load resistance via a very large capacitor a) If the transistor has V, = 1 V, and k',W/L = 2 mA/V2, find VGS, ID, and VD- b) Find...
Problem 2: The circuit shown is the AC equivalent circuit of a CC amplifier. The parameters for the BJI are β-100, r.-2.5 KOhms, VT-25 mV, and Va very large. A) Find the input impedance Rin and the output impedance Rout as indicated. B) Find the voltage gain A. /vC) Find Ic, the DC biasing current? RE2.5 P,
Please solve this Question
Figure Q4 shows a common-source amplifier. Construct the ac equivalent circuit, then apply Miller's Theorem and hence show that the voltage gain is given as: where J-is the voltage gain bandwidth. R, = RD //RL and C-C,, + (I + g.Rjcgd」 State clearly any approximations or assumptions used in your analysis. The parameters above are defined as follows: gm is the transistor transconductance, Ce and Cet are the internal capacitances between the gate/source and gate/drain respectively...
4. For the amplifier in the figure below use the parameters in the table: +Vcc Re VBE- 0.7V, Ri- 1002, R1-160k2, R2-320k2 R3-200k2, R6-40 k2, Rc-60k2, Vcc- 12V, Ry Do a) Draw the DC equivalent circuit and calculate the Q-point. c) Draw the AC equivalent circuit with the small signal model for the transistor. d) Calculate the voltage gain, Av-Vo/vi. Assume ro infinite. e) Draw the circuit to find the amplifier input resistance (Rin). Calculate Rin f Draw the circuit...
2) (40) Assume that the FET is saturated in the amplifier circuit below. (a) Draw the ac equivalent circuit for ro 00, (b) Find the ac voltage gain (vo/w) for ro = 00, (c) Draw the ac equivalent circuit for a finite ro. (d) Find the ac voltage gain (Vo/vi) for a finite ro Ay for ro Av for finite ro Rp FDD
QUESTION 7 Following circuit is the small-signal equivalent circuit of a common-emitter amplifier. Assume Ri 10 kn, RB - 93 KO, RL - 8.5 kn. Small signal parameters are gm = 100 m, 5k and ro - 10 kn. Calculate the voltage gain Avvo/ Re & m} ube gmbe 3 ro " vo
Q6. An amplifier circuit using an n-MOSFET is shown in Fig. Q6. The n-MOSFET has the following parameters: K'-1 mA/V2 and λ-0.02 w. v°' is a small signal AC voltage ource 8V 8V Vout Ra 2.56 mA Fig. Q6 (a) Calculate the DC gate voltage, Va. (b) Assuming that the n-MOSFET is operating in the saturation region and neglecting channel length modulation, calculate the threshold voltage, VrHN, given that the voltage drop across the de current sorce, Inas, has been...
Q1. For the cascade amplifier circuit shown in Fig (1): a) What are the functions of the capacitors C, C2 and C3? And what are the functions of the capacitors Cs and CE? b) What are the functions of the resistors RD and Rc? c) Draw the DC biasing circuits for each stage. d) Find loa, VGsa, VDs and gm for the JFET stage (you may use either mathematical or graphical methods) e) Calculate l, Ic, le and Ve for...
QUESTION5 The small-signal ac equivalent cireuit of a transistor amplifier with collector feedback is shown in the figure below. Assume the following circuit values: B- 200, re" i i o. RF-180 kn. Rc" 2.7 ?, RO-3.3 ?, ??-?2 = 10 ?? If the input voltage Vi-5 co (90 t) mv. determine the magnitude of the steady-state ac output voltage Vo (in mV), across the output load resistor Ro. Hint: Use node analysis to find the output node voltage, and note...
1.) 120 pointsl The parameters of n-channel enhancement MOSFET in the amplifier circuit below are: 2.042 mA/V2, 1 Val ½ 2.4 V, Kn 150 V a.) Find quiescent values: drain current i, gate-to-source voltage vGs, and drain-to-source voltage vDs b.) Determine AC model parameters: gm and ro c.) Determine amplifier model parameters: Ri, Ro and Avo d) Determine the output voltage Vl across the load RL ǐfv, 1 mYn +VDD GI〈 R ls R Mi RL
1.) 120 pointsl The...
Problem 2 In the CS amplifier circuit below, the input signal vois coupled to the gate through a very large capacitor (shown as infinite). The transistor source is connected to ground at signal frequencies via a very large capacitor. The output voltage signal that develops at the drain is coupled to a load resistance via a very large capacitor a) If the transistor has V, = 1 V, and k',W/L = 2 mA/V2, find VGS, ID, and VD- b) Find...
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