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4. Consider the Darlington circuit shown. 12V R1 4.3ΜΩ C1 Bo-9000 QVBED-1.4V Q2 C2 4302 a) Find the DC values of Ici, Ic2, Vcei, VcE2, P1, and P2. b) Determine the input impedance, output impedance,...
Problem 2 Consider the feedback amplifier circuit on Figure P2. The DC current gain of transistor Q3 is -100 1. What type of feedback (or what feedback topology) do we have on the circuit in Figure P...
Problem 2 Consider the feedback amplifier circuit on Figure P2. The DC current gain of transistor Q3 is -100 1. What type of feedback (or what feedback topology) do we have on the circuit in Figure P2? 2. Draw the A-circuit. Express and compute the open-loop voltage gain A at mid-band frequency 3, Draw the γ-circuit. Express and compute the feedback factor γ 4. Express and compute the overall gain of the feedback amplifier Ap Express and compute the input...
Problem 2: In the circuit on Figure P2, BJT NPN Q1 and Q2 emulate a Darlington...
Problem 2: In the circuit on Figure P2, BJT NPN Q1 and Q2 emulate a Darlington Pair (DP). It should be noted that Q1 and Q2 are such that their current gains are B1 B2 = B = 99. Moreover, capacitors C1 and C2 can be assumed to be very large. Note: The DC analysis of the DP circuit below can be done in a similar fashion as what you do when only dealing with one transistor. Express the current...
3) Find the output voltage for the circuit shown below. Rf 10K +12V DC R1 Vaw...
3) Find the output voltage for the circuit shown below. Rf 10K +12V DC R1 Vaw 2.2K IC1 UA741 Vb R2 W 2.2K -12V DC R3 Z RL 10K Fig 1 Differential amplifier using one opamp
Question I : Consider the amplifier circuit shown below (p-150 for both transistors) (18 marks) +12V R4 1k8 R1 15k Q1 2N3904 C2+ 10μ R2 6V 4k7 2mA Out Q2 2N3904 C1 R3 10k R5 1k8 In 10H (i) Perform...
Question I : Consider the amplifier circuit shown below (p-150 for both transistors) (18 marks) +12V R4 1k8 R1 15k Q1 2N3904 C2+ 10μ R2 6V 4k7 2mA Out Q2 2N3904 C1 R3 10k R5 1k8 In 10H (i) Perform DC analysis and prove that the indicated voltages and currents in the figure are correctly calculated. Find the operating point of Q1 and Q2 (5 marks) (ii) Calculate the gain of this amplifier (5 marks) (iii) In the lab, only...
R1 C1 HH The V1 R2 11 R3 circuit shown is a simplified representation of a...
R1 C1 HH The V1 R2 11 R3 circuit shown is a simplified representation of a small signal transistor amplifier circuit. The AC input voltage is V1, with angular frequency w. The current through R2, is It. The dependent current source, 11, has value 100 IV. Let R1 = 500, and R2 = 1000. The load resistor, R3 has a value that is selectable by a design engineer. Let C1 = 10 pF, and L1 = 1 uH. (For reference,...
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...
4. Consider the BJT cascade amplifier shown below Vcc 18V R1 3.3ko 15uF r Vo RL...
4. Consider the BJT cascade amplifier shown below Vcc 18V R1 3.3ko 15uF r Vo RL B 150 Rsa 500? 56k? Vi B 150 C1 CE 2.2k? a) Find the DC collector current (approximately the same in both transistors). b) Find the input impedance, output impedance, and no-load voltage gain. c) Find the Av, Avs, and Ai d) Estimate the lower cutoff frequency e) Why does this amplifier have better high-frequency performance thana common-emitter built using the same type of...
4. Consider the amplifier shown below. The MOSFET characteristics are listed beside the circuit diagram. 12V...
4. Consider the amplifier shown below. The MOSFET characteristics are listed beside the circuit diagram. 12V MOSFET Characteristics Ks 0.5 ?nCox(W/L) K-10 A/V 2 th- VA 100 V CX) Vì 597 K 2 k a. Determine the dc operating point (ID' VDs) of MOSFETM. b. Determine the input resistance looking into the input terminals. c. Determine the output resistance looking into the output terminals. d. Determine the voltage gain Vo/V
Vcc 12V Q1a Q1b VBIAS Q2 out Output Port Consider the current source circuit shown above. Assume ...
Vcc 12V Q1a Q1b VBIAS Q2 out Output Port Consider the current source circuit shown above. Assume that the DC bias voltage VBIAs is adjusted so that all transistors are guaranteed to be in the FA Problem 4 (6 points): Calculate the output current, assuming β and VA>oo. Note: you can assume that the output port is grounded for this calculation. [HA Problem 5 (6 points): Calculate the small-signal output resistance of the current source (Rout), assuming β-100 and V,-100V....
A common-emitter BJT amplificr is shown in Fig.8.1. Note the DC biasing values and the BJTsmall-s...
A common-emitter BJT amplificr is shown in Fig.8.1. Note the DC biasing values and the BJTsmall-signalmodel parameters from the class-signment #9 on DC Bia ing. Neglect the value of Rs in your calculations, k1 Rs-a k2: 1· Cal ulatethesmall-agalpannetas ofthe amplifi randcompletethecalculated valuesinTable8-1 Smalls-signal voltage gai, AVk Small-signal input resistance,k, Small-signaloutput resistance, Ro VW RC 2k C2 RB 570k Rs C1 1 10uP 0.1m 1 Vs CE RE 2k SINE(0 1mV 1kHz 0 0 00) tran 0 2ms 0 1us...
Problem 2 Consider the feedback amplifier circuit on Figure P2. The DC current gain of transistor Q3 is -100 1. What type of feedback (or what feedback topology) do we have on the circuit in Figure P2? 2. Draw the A-circuit. Express and compute the open-loop voltage gain A at mid-band frequency 3, Draw the γ-circuit. Express and compute the feedback factor γ 4. Express and compute the overall gain of the feedback amplifier Ap Express and compute the input...
Problem 2: In the circuit on Figure P2, BJT NPN Q1 and Q2 emulate a Darlington Pair (DP). It should be noted that Q1 and Q2 are such that their current gains are B1 B2 = B = 99. Moreover, capacitors C1 and C2 can be assumed to be very large. Note: The DC analysis of the DP circuit below can be done in a similar fashion as what you do when only dealing with one transistor. Express the current...
3) Find the output voltage for the circuit shown below. Rf 10K +12V DC R1 Vaw 2.2K IC1 UA741 Vb R2 W 2.2K -12V DC R3 Z RL 10K Fig 1 Differential amplifier using one opamp
Question I : Consider the amplifier circuit shown below (p-150 for both transistors) (18 marks) +12V R4 1k8 R1 15k Q1 2N3904 C2+ 10μ R2 6V 4k7 2mA Out Q2 2N3904 C1 R3 10k R5 1k8 In 10H (i) Perform DC analysis and prove that the indicated voltages and currents in the figure are correctly calculated. Find the operating point of Q1 and Q2 (5 marks) (ii) Calculate the gain of this amplifier (5 marks) (iii) In the lab, only...
R1 C1 HH The V1 R2 11 R3 circuit shown is a simplified representation of a small signal transistor amplifier circuit. The AC input voltage is V1, with angular frequency w. The current through R2, is It. The dependent current source, 11, has value 100 IV. Let R1 = 500, and R2 = 1000. The load resistor, R3 has a value that is selectable by a design engineer. Let C1 = 10 pF, and L1 = 1 uH. (For reference,...
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...
4. Consider the BJT cascade amplifier shown below Vcc 18V R1 3.3ko 15uF r Vo RL B 150 Rsa 500? 56k? Vi B 150 C1 CE 2.2k? a) Find the DC collector current (approximately the same in both transistors). b) Find the input impedance, output impedance, and no-load voltage gain. c) Find the Av, Avs, and Ai d) Estimate the lower cutoff frequency e) Why does this amplifier have better high-frequency performance thana common-emitter built using the same type of...
4. Consider the amplifier shown below. The MOSFET characteristics are listed beside the circuit diagram. 12V MOSFET Characteristics Ks 0.5 ?nCox(W/L) K-10 A/V 2 th- VA 100 V CX) Vì 597 K 2 k a. Determine the dc operating point (ID' VDs) of MOSFETM. b. Determine the input resistance looking into the input terminals. c. Determine the output resistance looking into the output terminals. d. Determine the voltage gain Vo/V
Vcc 12V Q1a Q1b VBIAS Q2 out Output Port Consider the current source circuit shown above. Assume that the DC bias voltage VBIAs is adjusted so that all transistors are guaranteed to be in the FA Problem 4 (6 points): Calculate the output current, assuming β and VA>oo. Note: you can assume that the output port is grounded for this calculation. [HA Problem 5 (6 points): Calculate the small-signal output resistance of the current source (Rout), assuming β-100 and V,-100V....
A common-emitter BJT amplificr is shown in Fig.8.1. Note the DC biasing values and the BJTsmall-signalmodel parameters from the class-signment #9 on DC Bia ing. Neglect the value of Rs in your calculations, k1 Rs-a k2: 1· Cal ulatethesmall-agalpannetas ofthe amplifi randcompletethecalculated valuesinTable8-1 Smalls-signal voltage gai, AVk Small-signal input resistance,k, Small-signaloutput resistance, Ro VW RC 2k C2 RB 570k Rs C1 1 10uP 0.1m 1 Vs CE RE 2k SINE(0 1mV 1kHz 0 0 00) tran 0 2ms 0 1us...
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