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Problem 1: (4 pts) The circuit below uses current source biasing and two amplifier stages. Assume...
2. Consider the amplifier to the right. This is a common base amplifier Assume that the...
2. Consider the amplifier to the right. This is a common base amplifier Assume that the values of r ro, B, and gm, are known, or have bee found from the DC analysis. For the following questions, you have t show all steps of the circuit analysis. cC (a) Draw the small-signal version of this amplifier Include th Early effect resistance in the pi-model. In other words, the pi model should be: be To (b) Use the circuit of part...
Draw the circuit of a common source amplifier, which is biased by a MOSFET current mirror,...
Draw the circuit of a common source amplifier, which is biased by a MOSFET current mirror, and which uses only one capacitor and two resistors (including the RREF of the current mirror). Assume that the input to the amplifier is a zero-DC signal. Then, design the amplifier to achieve a gain Avo--gRo =-4V/V, and an output resistance Ro-Ro-1K. Ignore channel modulation. Assume that all MOSFETS are identical with VIN-1V, and Kn = 2mA/V. Use Vo = 5V and Vs =-5V....
Q #4: (6 marks). For the following circuit, all the transistors are biased in saturation region w...
Q #4: (6 marks). For the following circuit, all the transistors are biased in saturation region with identical length and width of 1μm and 6.5μm, respectively. It is g 200μΑν-2, Wal Calculate the small signal parameters gm and ro for Q1. What is the value of voltage gain (Av)? iven that, VDD=5V, Vt= 1V, μ.co,- sor and 'REF-0.5mA. Draw the small signal circuit of the following amplifier. VDD es 02 REP ei Vo
Q #4: (6 marks). For the following...
For the simple differential amplifier shown below, a) Calculate the differential gain, Av , of th...
For the simple differential amplifier shown below,
a) Calculate the differential gain, Av , of the circuit
b) Calculate the common-mode gain, ACM, of the
circuit and compute CMRR
c) The common-mode gain can be reduced by replacing the resistor
RE, with a constant current source. Design a current
source that is not dependent on Beta linearly to
replace RE, transistors of the same characteristics as
Q1 and Q2, and resistors of your choice
*(Q1, Q2 = 120; ro =...
Consider the amplifier given in the figure below. Assume that the transistors Q1 and Q2 are...
Consider the amplifier given in the figure below. Assume that the transistors Q1 and Q2 are biased in saturation and have small-signal parameters given as: gml, 9m2, rol, ro2. Vop=2.0V Include channel length modulation (you have an r.) and solve for the low frequency small-signal voltage gain A, C= Vout/Vin) of the circuit. SHOW YOUR WORK, INCLUDING YOUR SMALL SIGNAL MODEL!
Question 4: Figure 4 In the series-shunt feedback amplifier shown in Figure 4, the transistors are...
Question 4: Figure 4 In the series-shunt feedback amplifier shown in Figure 4, the transistors are biased with ideal current-sources 1, 0.1mA, 12 1mA, the devices operate with VE0.7V and t = 100. The input signal V, has a zero DC component. Resistances are (a) If the open loop gain is large, what do you expect the closed-loop gain A, -V/V, to be? Give both an expression and its approximate value (b) Find the DC emitter current in each of...
Q #4: (6 marks). For the following circuit, all the transistors are biased in saturation region...
Q #4: (6 marks). For the following circuit, all the transistors are biased in saturation region with identical length and width of 1μm and 6.5μm, respectively. It is g 200μΑν-2, Wal Calculate the small signal parameters gm and ro for Q1. What is the value of voltage gain (Av)? iven that, VDD=5V, Vt= 1V, μ.co,- sor and 'REF-0.5mA. Draw the small signal circuit of the following amplifier. VDD es 02 REP ei Vo
Problem 2: BJT Small-Signal Voltage Amplifiers in the lectures, we covered in detail the analysis of an npn BJT amplifier that utilizes a single-supply DC biasing. In this problem, you will meet...
Problem 2: BJT Small-Signal Voltage Amplifiers in the lectures, we covered in detail the analysis of an npn BJT amplifier that utilizes a single-supply DC biasing. In this problem, you will meet two additional amplifier architectures- one that is based on dual DC supplies combined with a DC current source, and the other that utilizes a pnp BJT with single-supply biasing. In both problems (below) you need to manually find the amplifier's Q-point (that is, the DC values of Ic...
QUESTION4 Total 24 Marks] For the amplifier circuit shown in Figure 4, assume the input signal...
QUESTION4 Total 24 Marks] For the amplifier circuit shown in Figure 4, assume the input signal V has zero DC component. Assume both transistors have p-100. (a) State the type of feedback topology used in the amplifier circuit and which type of 12 marks] amplifier is shown in the figure. (b Determine the DC voltages at all nodes of transistors Q1 and Q2. and the DC currents 18 marks] at the emitters of transistors Q1 and Q2 (c) Use the...
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...
2. Consider the amplifier to the right. This is a common base amplifier Assume that the values of r ro, B, and gm, are known, or have bee found from the DC analysis. For the following questions, you have t show all steps of the circuit analysis. cC (a) Draw the small-signal version of this amplifier Include th Early effect resistance in the pi-model. In other words, the pi model should be: be To (b) Use the circuit of part...
Draw the circuit of a common source amplifier, which is biased by a MOSFET current mirror, and which uses only one capacitor and two resistors (including the RREF of the current mirror). Assume that the input to the amplifier is a zero-DC signal. Then, design the amplifier to achieve a gain Avo--gRo =-4V/V, and an output resistance Ro-Ro-1K. Ignore channel modulation. Assume that all MOSFETS are identical with VIN-1V, and Kn = 2mA/V. Use Vo = 5V and Vs =-5V....
Q #4: (6 marks). For the following circuit, all the transistors are biased in saturation region with identical length and width of 1μm and 6.5μm, respectively. It is g 200μΑν-2, Wal Calculate the small signal parameters gm and ro for Q1. What is the value of voltage gain (Av)? iven that, VDD=5V, Vt= 1V, μ.co,- sor and 'REF-0.5mA. Draw the small signal circuit of the following amplifier. VDD es 02 REP ei Vo
Q #4: (6 marks). For the following...
For the simple differential amplifier shown below,
a) Calculate the differential gain, Av , of the circuit
b) Calculate the common-mode gain, ACM, of the
circuit and compute CMRR
c) The common-mode gain can be reduced by replacing the resistor
RE, with a constant current source. Design a current
source that is not dependent on Beta linearly to
replace RE, transistors of the same characteristics as
Q1 and Q2, and resistors of your choice
*(Q1, Q2 = 120; ro =...
Consider the amplifier given in the figure below. Assume that the transistors Q1 and Q2 are biased in saturation and have small-signal parameters given as: gml, 9m2, rol, ro2. Vop=2.0V Include channel length modulation (you have an r.) and solve for the low frequency small-signal voltage gain A, C= Vout/Vin) of the circuit. SHOW YOUR WORK, INCLUDING YOUR SMALL SIGNAL MODEL!
Question 4: Figure 4 In the series-shunt feedback amplifier shown in Figure 4, the transistors are biased with ideal current-sources 1, 0.1mA, 12 1mA, the devices operate with VE0.7V and t = 100. The input signal V, has a zero DC component. Resistances are (a) If the open loop gain is large, what do you expect the closed-loop gain A, -V/V, to be? Give both an expression and its approximate value (b) Find the DC emitter current in each of...
Q #4: (6 marks). For the following circuit, all the transistors are biased in saturation region with identical length and width of 1μm and 6.5μm, respectively. It is g 200μΑν-2, Wal Calculate the small signal parameters gm and ro for Q1. What is the value of voltage gain (Av)? iven that, VDD=5V, Vt= 1V, μ.co,- sor and 'REF-0.5mA. Draw the small signal circuit of the following amplifier. VDD es 02 REP ei Vo
Problem 2: BJT Small-Signal Voltage Amplifiers in the lectures, we covered in detail the analysis of an npn BJT amplifier that utilizes a single-supply DC biasing. In this problem, you will meet two additional amplifier architectures- one that is based on dual DC supplies combined with a DC current source, and the other that utilizes a pnp BJT with single-supply biasing. In both problems (below) you need to manually find the amplifier's Q-point (that is, the DC values of Ic...
QUESTION4 Total 24 Marks] For the amplifier circuit shown in Figure 4, assume the input signal V has zero DC component. Assume both transistors have p-100. (a) State the type of feedback topology used in the amplifier circuit and which type of 12 marks] amplifier is shown in the figure. (b Determine the DC voltages at all nodes of transistors Q1 and Q2. and the DC currents 18 marks] at the emitters of transistors Q1 and Q2 (c) Use the...
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...
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