Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
7th Edition
ISBN: 9780199339136
Author: Adel S. Sedra, Kenneth C. Smith
Publisher: Oxford University Press
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Chapter 10, Problem D10.7P
To determine
The resulting value of
The value of total capacitance needed
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.1. Solve the output voltage if the gain is 24 db with aninput of 5mV.?
2. Assume a load resistor, RL of 2.2kΩs and a supply voltage of 24v. Calculate the Collector current (Ic) flowing through the load resistor when the transistor is switched fully "ON", assume Vce = 0, & β = 100. Also find the value of the Emitter resistor, Re with a voltage drop of 1.3v across it, R1, R2, and Ib. Assume also a value of 9 times Ib flowing through the resistor R2, while 10 times Ib flowing through R1.
The ac equivalent circuit for an amplifier is shown . Assume the capacitors have infinite value, RI = 10 kΩ, RB = 5 MΩ, RC = 1.5 MΩ, and R3 = 3.3 MΩ. Calculate the input resistance and output resistance for the amplifier if the BJT Q-point is (2 μA, 2 V). Assume βo = 40 and VA = 50 V.
What are the voltage gain, input resistance, and output resistance of the amplifier in Fig. P10.60 if Ri = 8.2 k and R₂ 750 k2? Express the voltage gain in dB.
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Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
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- The ac equivalent circuit for an amplifier is shown . Assume the capacitors have infinite value, RI = 10 kΩ, RB = 5 MΩ, RC = 1.5 MΩ, and R3 = 3.3 MΩ. Calculate the input resistance and output resistance for the amplifier if the BJT Q-point is (2 μA, 2 V). Assume βo = 40 and VA = 50 V. Rework the given problem if IC is increased to 100 μA, and the values of RC, RB, and R3 are all reduced by a factor of 50.arrow_forwardThe ac equivalent circuit for an amplifier is shown. Assume the capacitors have infinite value, RI = 100 kΩ, RG = 10 MΩ, RD = 560 kΩ, and R3 = 1.5 MΩ. Calculate the voltage gain for the amplifier if the MOSFETQ-point is (10 μA, 5 V). Assume Kn = 100 μA/V2 and λ = 0.02 V−1.arrow_forward(a) What is the value of C required for fo = 10.7 MHz in the circuit as shown if IC = 10 mA, VCE = 10 V, βo = 100, Cμ = 1.75 pF, fT = 500 MHz, and VA = 75 V? (b) What is the Q of the amplifier? (c) Where should a tap be placed on the inductor to achieve a Q of 100? (d) What is the new value of C required to achieve fo = 10.7 MHz?arrow_forward
- When a high-frequency transconductance amplifier whose output resistance is 100 kΩ isconnected to a load capacitor, the measured 3-dB bandwidth of the amplifier is reduced from 5 MHzto 100 kHz. Estimate the value of the load capacitor. If the original cutoff frequency can be attributedto a small parasitic capacitor at the output node (i.e., between the output and ground), what would youestimate it to be?arrow_forwardIn the circuit given in the figure, what is the voltage gain (Av) of the circuit when = 100, r0 = 40 kΩ, RB = 360 kΩ, RC = 3.3 kΩ, RE = 220 Ω, Rs = 15 kΩ and RL = 166 kΩ?NOTE-1: The output impedance r0 of the transistor will be taken into the calculations.NOTE-2: Capacitors are negligible at mid-band frequency.arrow_forwardThe ac equivalent circuit for an amplifier is shown . Assume the capacitors have infinite value, RI = 10 kΩ, RG = 1 MΩ, RD = 3.9 kΩ, and R3 = 33 kΩ. Calculate the voltage gain for the amplifier if the MOSFET Q-pointis (2 mA, 7.5 V). Assume Kn = 1 mA/V2 and λ = 0.015 V−1.arrow_forward
- (a) The input voltage applied to the amplifier as shown is vI = VB + VM sin 1000t. What isthe voltage gain of the amplifier for small values ofVM if VB = 0.6 V? What is the maximum value ofVM that can be used and still have an undistortedsinusoidal signal at vO? (b) Write expressions forvI (t) and νO(t).arrow_forwardWhat power is being dissipated by the MOSFET as shown? What is the total power being supplied to the amplifier? Use the Q-point information given earlier (241 μA, 3.81 V).arrow_forwardIn the common emitter amplifier, R1 = 50Ω, R2 = 1kΩ, and CL=1 pF. Determine the quiescent collector current, ICQ, needed such that the unity gain frequency, fu, = 1 GHz. Show your complete solution and state all your assumptions.arrow_forward
- (a) The transistors in the differential amplifier as shown are biased at a collector current of 18 μA, and RC = 430 kΩ. The transistors have fT = 75 MHz, Cμ = 0.5 pF, and rx = 500 Ω. What is the bandwidth of the differential amplifier? (b) Repeat if the collector current is increased to 50 μA and RC is reduced to 140 kΩ.arrow_forwardThe operational amplifier is powered by (+ and - 5 Volts) What is the transfer function of this system? If V in = 5 volts what would V out be if R=100 ohms, Rf=1000 ohms, RS=100 ohms? If V in = 5 volts what would V out be if R=100 ohms, Rf=1000 ohms, RS=105 ohms? Determine the sensitivity in units of volts/ohms.arrow_forwardGiven: Voltage Divider Bias Circuit Supply: 10Vdc to 24Vdc Load: 1000 ohms Voltage Gain: 80 to 400 Lower Cutt off Frequency: 100Hz Sinusoidal source (zero internal resistance): 50mVp-p Transistor: Si, beta=75 Base-Collector Capacitance= 8pF Base-Emitter Capacitance= 25pF Design a Single-stage Common Emitter Class A Amplifier and compute the following: a) dc load line b) hie c) midband gain d) Miller equivalent Capacitances e) upper cut off frequencyarrow_forward
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