Homework Answers
1)pspice circuit code and its result
differential amplifier circuit pspice file
Vcc vcc 0 DC 5
Vee 0 vee DC 5
Vi vi 0 AC 1
R1 vcc vo1 4.7k
R2 vcc vo2 4.7k
R3 vcc vx 10k
Q1 vo1 vi vp nmod
Q2 vo2 0 vp nmod
Q3 vp vx vee nmod
Q4 vx vx vee nmod
.model nmod npn(BF=150,IS=1e-15)
.AC DEC 50 1 1MEG
.probe
.end
Add Answer to:
100% ." A differential amplifier is shown in Figure QI(d). The input to the amplifier is...
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...
For the differential amplifier shown in Figure (2),
For the differential amplifier shown in Figure (2),assume \(\mathrm{VCC}=12 \mathrm{~V}, \mathrm{VEE}=-12 \mathrm{~V}, \mathrm{Rc}=2 \mathrm{k} \Omega\), and \(\beta=100\) for all transistors.For the current source circuit (Transistor \(\left.Q_{3}\right): R_{1}=4 k \Omega, R_{2}=4 k \Omega, R_{3}=3 \mathrm{k} \Omega\), and \(r_{0}=100 \mathrm{k} \Omega\).a) In differential amplifier circuits, what do "well-matched transistors" mean?b) Why it is important to use well-matched transistors in differential amplifier circuits?c) What are the operating \(Q\) point values \(\left(I_{c Q}\right.\) and \(\left.V_{C Q}\right)\) for the transistors \(Q_{1}\) and \(Q_{2}\) ?d) Draw...
8.93 For the folded-cascode differential amplifier of Fig. 8.38, find the value of VBlAs that res...
Please solve in details and in a clear way.
8.93 For the folded-cascode differential amplifier of Fig. 8.38, find the value of VBlAs that results in the largest possible positive output swing, while keeping Q3, Q,, and the pnp transistors that realize the current sources out of saturation. Assume Voc-VEE-5 V. If the dc level at the output is 0 V, find the maximum allowable output signal swing. For 1- 0.5 mA, β,-50, β,-100, and V,-100 V in G, Rod,...
Class C power amplifier calculation (c) A Class C power amplifier shown in Figure-Q4 has a...
Class C power amplifier
calculation
(c) A Class C power amplifier shown in Figure-Q4 has a base bias voltage V" = -5V and Vcc = 30V. It is determined that a peak value of 9.8V at 1MHz is required to drive the transistor to its saturation current of 1.8A. Further let the ratio, peak value of the fundamental component to the peak value of the output waveform be approximated by (-0.0072贍+ 4.1e-3.54) × 10-3 where 0c is the conduction angle...
c) In estimating DC imperfections (input offset voltage, input offset current and the inverting amplifier with...
c) In estimating DC imperfections (input offset voltage, input offset current and the inverting amplifier with nominal gain of -100 using 1 current) of an op-map, an and 10MQ resistors is implemented using the op-amp as shown in Fig 2(a) below R2 10MQ R 100k Vi Vo Figure 2(a): Inverting amplifier Measurements are conducted on the output voltage of the inverting amplifier under the following conditions: (i) the input (V) is open circuited and the output voltage is found to...
QI (a) () Design an active filter using non-inverting amplifier that will produce a frequency response...
QI (a) () Design an active filter using non-inverting amplifier that will produce a frequency response as shown in Figure Ql(a). The bandwidth of the filter is 30 kHz. Use a capacitor value of 10 nF. (9 marks) Draw the circuit and clearly label it. (5 marks) (b) Derive the transfer function of the filter in Q1(b). (6 marks) Av (dB) 28 dB 25 dB - 20 dB/decade + 20 dB/decade - 1 1 35 kHz 40 kHz Figure Qi(a)...
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...
Given below is a differential operational amplifier in block form and its internal transistor circuit with...
Given below is a differential operational amplifier in block
form and its internal transistor circuit with VCC=20V, VEE= 12 V ,
RC=5kΩ,RE=1kΩ and R1=2kΩ. Assume that the transistors are identical
and have a βac=βdc=100. An ac signal Vi(t)=5sin(10t) is applied to
the input terminals where Terminal 1 is Positive (non-invertinq)
& Terminal 2 is negative (inverting) as stated in the cases
below. Draw the output signals in each case.
: a) V1=Vi(t) , V2=Grounded. Vo(t)=Vo2-Vo1 )
b) V1=Grounded , V2=Vi(t)....
For the differential input stage shown below, the differential input impedance is required to be 100k....
For the differential input stage shown below, the differential input impedance is required to be 100k. Estimate the bias current in the differential amplifier to meet this specification. Hence calculate the value of R2 (in ko) required to set this bias current. The Early voltage of the NPN transistor is 150 V and that for the PNP is 50 V. Vcc (+9 V) 2N2907 Q5 2N2907 Vin (-) Q6 2N2907 2N2907 Q8 2N2222 09 2N2222 VEE (-9 V) assume lo...
5. (20 points) For the amplifier in the following figure: +Vcc Rout Rc C3 R2 Rin Ri 1 k R3 Vo Vi R1 RE -VEE a) Draw the de equivalent circuit and find the Q-point. Assume B -75 b) Draw the equiv...
5. (20 points) For the amplifier in the following figure: +Vcc Rout Rc C3 R2 Rin Ri 1 k R3 Vo Vi R1 RE -VEE a) Draw the de equivalent circuit and find the Q-point. Assume B -75 b) Draw the equivalent circuit used for ac analysis. Find the values in Thevenin equivalent representation for the amplifiers between C, and C as shown below. What is the maximum value of v, that satisfies the small- signal assumption? Rout Ri vi...
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...
Please solve in details and in a clear way.
8.93 For the folded-cascode differential amplifier of Fig. 8.38, find the value of VBlAs that results in the largest possible positive output swing, while keeping Q3, Q,, and the pnp transistors that realize the current sources out of saturation. Assume Voc-VEE-5 V. If the dc level at the output is 0 V, find the maximum allowable output signal swing. For 1- 0.5 mA, β,-50, β,-100, and V,-100 V in G, Rod,...
Class C power amplifier
calculation
(c) A Class C power amplifier shown in Figure-Q4 has a base bias voltage V" = -5V and Vcc = 30V. It is determined that a peak value of 9.8V at 1MHz is required to drive the transistor to its saturation current of 1.8A. Further let the ratio, peak value of the fundamental component to the peak value of the output waveform be approximated by (-0.0072贍+ 4.1e-3.54) × 10-3 where 0c is the conduction angle...
c) In estimating DC imperfections (input offset voltage, input offset current and the inverting amplifier with nominal gain of -100 using 1 current) of an op-map, an and 10MQ resistors is implemented using the op-amp as shown in Fig 2(a) below R2 10MQ R 100k Vi Vo Figure 2(a): Inverting amplifier Measurements are conducted on the output voltage of the inverting amplifier under the following conditions: (i) the input (V) is open circuited and the output voltage is found to...
QI (a) () Design an active filter using non-inverting amplifier that will produce a frequency response as shown in Figure Ql(a). The bandwidth of the filter is 30 kHz. Use a capacitor value of 10 nF. (9 marks) Draw the circuit and clearly label it. (5 marks) (b) Derive the transfer function of the filter in Q1(b). (6 marks) Av (dB) 28 dB 25 dB - 20 dB/decade + 20 dB/decade - 1 1 35 kHz 40 kHz Figure Qi(a)...
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...
Given below is a differential operational amplifier in block
form and its internal transistor circuit with VCC=20V, VEE= 12 V ,
RC=5kΩ,RE=1kΩ and R1=2kΩ. Assume that the transistors are identical
and have a βac=βdc=100. An ac signal Vi(t)=5sin(10t) is applied to
the input terminals where Terminal 1 is Positive (non-invertinq)
& Terminal 2 is negative (inverting) as stated in the cases
below. Draw the output signals in each case.
: a) V1=Vi(t) , V2=Grounded. Vo(t)=Vo2-Vo1 )
b) V1=Grounded , V2=Vi(t)....
For the differential input stage shown below, the differential input impedance is required to be 100k. Estimate the bias current in the differential amplifier to meet this specification. Hence calculate the value of R2 (in ko) required to set this bias current. The Early voltage of the NPN transistor is 150 V and that for the PNP is 50 V. Vcc (+9 V) 2N2907 Q5 2N2907 Vin (-) Q6 2N2907 2N2907 Q8 2N2222 09 2N2222 VEE (-9 V) assume lo...
5. (20 points) For the amplifier in the following figure: +Vcc Rout Rc C3 R2 Rin Ri 1 k R3 Vo Vi R1 RE -VEE a) Draw the de equivalent circuit and find the Q-point. Assume B -75 b) Draw the equivalent circuit used for ac analysis. Find the values in Thevenin equivalent representation for the amplifiers between C, and C as shown below. What is the maximum value of v, that satisfies the small- signal assumption? Rout Ri vi...
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