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P.3: (4 marks) The AC circuit for the amplifier is given below 1- Draw the AC...
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
Q. 4. (a) Draw a small signal equivalent circuit by replacing the BJT with its hybrid-1...
Q. 4. (a) Draw a small signal equivalent circuit by replacing the BJT with its hybrid-1 model for the circuit shown below. Also derive an expression for Zin when ro is neglected. (iv) + Vx
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...
Quiz-11 Spring 2018 Problem: The circuit shown is the AC equivalent of a Br CB amplifier....
Quiz-11 Spring 2018 Problem: The circuit shown is the AC equivalent of a Br CB amplifier. The transistor parameters are gm 40 mA/V, r-2 model. B) Find equivalent of a BIT CB amplfieh rornd ovi the voltage gain Av ohms, and ro is very large. A) Find re for the transistor Ka
1. The following circuit shows a discrete common source MOSFET amplifier. The MOSFTE is n-channel MOSFET...
1. The following circuit shows a discrete common source MOSFET amplifier. The MOSFTE is n-channel MOSFET and early voltage (Va) is c. The transconductance of the amplifier (ga) is 3 mA/V The frequency responses of the amplifier are as follows i) The three low break frequencies f 3Hz (caused by C).fiz-S0Hz (caused by Cs). fs-10Hz (caused by Ca) ii) High 3 dB frequency. f-30kHz ii) The MOSFET unity gain frequency fr-100 MHz (a) Draw small signal equivalent circuit of the...
EEET255 Electronics Page 4 of6 QUESTION 3: [25 marks] Figure 3 shows a feedback amplifier circuit...
EEET255 Electronics Page 4 of6 QUESTION 3: [25 marks] Figure 3 shows a feedback amplifier circuit R, is the source resistor, R is the feedback resistor and R, is the load resistor. The op-amp has an internal input resistance of R, an intemal output resistance R, and an internal gain of A Apply the "Systematic Analysis" method in this question. Figure 3 3.a State the feedback topology used in the amplifier circuit and which type of feedback amplifier is shown...
For the differential amplifier shown in Figure 6: Assume well-matched transistors and = 100 for all transistors: a) Wh...
For the differential amplifier shown in Figure 6: Assume
well-matched transistors and = 100 for all transistors:
a) Why it is important to use well-matched transistors in
differential amplifier circuits? What is the potential influence of
mismatched transistors on the performance of the differential
amplifier?
b) Determine the resistor values (R1, R2 and R3) such that the
emitter coupled current IE = 0.5 mA and VC1 = 3 V.
c) Draw the ac equivalent circuit for the single ended...
Draw the ac equivalent circuit for the amplifier shown. Indicate all component values clearly QUESTION 4...
Draw the ac equivalent circuit for the amplifier shown. Indicate
all component values clearly
QUESTION 4 (15 Points) 30V a. Draw the ac equivalent circuit for the amplifier shown. Indicate all component values clearly. 3.3 k2 b. Determine the output voltage Vo, if Vi-1.2 mV and rd-40 kΩ for the E-type MOSFET 40 ΜΩ c. Repeat part (b), assuming 1.2 kQ resistor is unbypassed k04x 10-3 3105%6 10ΜΩ 1.2 kΩ
2.34. Consider the common-emitter amplifier on the right. (a)Draw a small-signal equivalent circuit using the T-model without the B1 Cci output resistance (b)Find an expression for the input resistan...
2.34. Consider the common-emitter amplifier on the right. (a)Draw a small-signal equivalent circuit using the T-model without the B1 Cci output resistance (b)Find an expression for the input resistance Rin. (c)Find an expression for the output resistance Ro. (d) Find an expression for the lower cut-off frequency Vi Re sig 82 C, (RE-R) in associated with Cci. (d)Find expressions for the two gains vo/v, and v/Vsig CI.
2.34. Consider the common-emitter amplifier on the right. (a)Draw a small-signal equivalent circuit...
All questions refer to the "simplified" CE amplifier shown below that has no RE at all, and no Cg. There is...
All questions refer to the "simplified" CE amplifier shown below that has no RE at all, and no Cg. There is also no CL. The bias circuit gives Ic 1.5 mA The transistor has B 120, ro 50 k, Cu 1.5 pF and C 9 pF. You can neglect r. VCC RC 5k C2 +Vo C1 2uF RI R3 Vi- 10k 100 2uF RB 200k a) Find the short-circuit time constants Ti and Ta for capacitors C1and Ca, and find...
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
Q. 4. (a) Draw a small signal equivalent circuit by replacing the BJT with its hybrid-1 model for the circuit shown below. Also derive an expression for Zin when ro is neglected. (iv) + Vx
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...
Quiz-11 Spring 2018 Problem: The circuit shown is the AC equivalent of a Br CB amplifier. The transistor parameters are gm 40 mA/V, r-2 model. B) Find equivalent of a BIT CB amplfieh rornd ovi the voltage gain Av ohms, and ro is very large. A) Find re for the transistor Ka
1. The following circuit shows a discrete common source MOSFET amplifier. The MOSFTE is n-channel MOSFET and early voltage (Va) is c. The transconductance of the amplifier (ga) is 3 mA/V The frequency responses of the amplifier are as follows i) The three low break frequencies f 3Hz (caused by C).fiz-S0Hz (caused by Cs). fs-10Hz (caused by Ca) ii) High 3 dB frequency. f-30kHz ii) The MOSFET unity gain frequency fr-100 MHz (a) Draw small signal equivalent circuit of the...
EEET255 Electronics Page 4 of6 QUESTION 3: [25 marks] Figure 3 shows a feedback amplifier circuit R, is the source resistor, R is the feedback resistor and R, is the load resistor. The op-amp has an internal input resistance of R, an intemal output resistance R, and an internal gain of A Apply the "Systematic Analysis" method in this question. Figure 3 3.a State the feedback topology used in the amplifier circuit and which type of feedback amplifier is shown...
For the differential amplifier shown in Figure 6: Assume
well-matched transistors and = 100 for all transistors:
a) Why it is important to use well-matched transistors in
differential amplifier circuits? What is the potential influence of
mismatched transistors on the performance of the differential
amplifier?
b) Determine the resistor values (R1, R2 and R3) such that the
emitter coupled current IE = 0.5 mA and VC1 = 3 V.
c) Draw the ac equivalent circuit for the single ended...
Draw the ac equivalent circuit for the amplifier shown. Indicate
all component values clearly
QUESTION 4 (15 Points) 30V a. Draw the ac equivalent circuit for the amplifier shown. Indicate all component values clearly. 3.3 k2 b. Determine the output voltage Vo, if Vi-1.2 mV and rd-40 kΩ for the E-type MOSFET 40 ΜΩ c. Repeat part (b), assuming 1.2 kQ resistor is unbypassed k04x 10-3 3105%6 10ΜΩ 1.2 kΩ
2.34. Consider the common-emitter amplifier on the right. (a)Draw a small-signal equivalent circuit using the T-model without the B1 Cci output resistance (b)Find an expression for the input resistance Rin. (c)Find an expression for the output resistance Ro. (d) Find an expression for the lower cut-off frequency Vi Re sig 82 C, (RE-R) in associated with Cci. (d)Find expressions for the two gains vo/v, and v/Vsig CI.
2.34. Consider the common-emitter amplifier on the right. (a)Draw a small-signal equivalent circuit...
All questions refer to the "simplified" CE amplifier shown below that has no RE at all, and no Cg. There is also no CL. The bias circuit gives Ic 1.5 mA The transistor has B 120, ro 50 k, Cu 1.5 pF and C 9 pF. You can neglect r. VCC RC 5k C2 +Vo C1 2uF RI R3 Vi- 10k 100 2uF RB 200k a) Find the short-circuit time constants Ti and Ta for capacitors C1and Ca, and find...
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