Answer #2 with solution please dB each.38(3.24 dB)2. Two resistors 20k2 and 50KSN are at ambient temperature. Calculate for a bandwidth equal to 100kHz, the thermal noise voltage for the tworesistors connected in parallel.40(4.78microV)3. A3 stage amplifier is to have an overall noise temperature no greater than 70°K. The overall gain of the amplifier is to be at least 45 db. Thewlifen in tohuilt h u oddinglounoioo fiulifion uith ouiating ohouofolloua ftao20 dR

Answered: Image /qna-images/answer/137949c2-3ce4-4af2-b856-5691ac495de4.jpg

Answered: dB each. 38(3.24 dB) 2. Two resistors…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Similar questions

Choose the correct answer to the two points 2-The ac emitter resistance of an emitter followera-Equal the dc emitter resistance .b-Is larger than the load resistance .c-Is β times smaller than the load resistance. d-Is usually less than the load resistance.3-A common-base amplifier can be used when a-Matching low to high impedance.b-A voltage gain without a current gain is required. c-A high- frequency amplifier is needed.d-All of the above.
the transistor in the circuit above has gm=0.11mS and ro=33Kohm. Given the following condition: R1=770Kohm, R2=890Kohm, RD=5.4Kohm, R3=20Kohm, R6=6.9Kohm, Rsig=2Kohm, determine the input impedance of the amplifier in Kohm.
In the circuit in the figure, Vcc = 18 V and RL = 2.2 kΩ, while C1 = C2 = CE = 0.1 μF. It is also known that for parasitic and wiring capacitors, Cwi = 15 pF, Cwo = 21 pF, Cbc = 27 pF, Cbe = 887 pF and Cce = 25 pF. Accordingly, what is the bandwidth of the system? NOTE-1: The output impedance of the transistor r0 will be neglected in the calculations. NOTE-2: The high frequency dependence of hfe, β, will be neglected.
Calculate the center frequency when the lower cutoff frequency is 20Hz and the higher cutoff frequency is 2kHz. Choices: a) 200Hz, b) 2020Hz, c) 2000Hz, and d) 44.72Hz If the midrange voltage gain of a certain amplifier is 100dB, what is the gain at cutoff frequency? Choices: a) 3dB, b) 50dB, c) 97dB, and d) 100dB
For the given amplifier circuit, asnwer the following question: a) For R1= 12 kΩ, R2= 10 kΩ, RE= 1 kΩ, RC = 1.2 kΩ, determine the following dc parameters: VB, VE, IE, and VC . (assume stiff voltage divider) b) For r’e = 5.5 Ω, R1= 12 kΩ, R2= 10 kΩ, RE= 1 kΩ, RC = 1.2 kΩ, RL = 7.5 kΩ, RS = 500 Ω, determine the input resistance at the base ( Rin(base) ), the total input resistance ( Rin(tot) ), voltage gain (Av) ,and attenaution. c) Assume that the overall voltage gain A’v = 120, the dc collector voltage VC = 6.3 V, and Vin = 15 mV rms. Determine the ac collector voltage (Vc) , then draw the total collector voltage waveform d) For r’e = 5.5 Ω, RE= 1 kΩ, RC = 1.2 kΩ, RL = 7.5 kΩ, determine the voltage gain if C2 is removed. Explain the effect of removing C2 on gain stability.
Design For the design of the amplifiers, consider a very large load resistance RL. Use a 15 V DC source and a sinusoidal input signal of 200 mVpp and 1 kHz. Design a voltage amplification stage with a common emitter amplifier thatmeet the following specifications: Voltage gain of 15 (Av2 ≅ 15) Input impedance greater than or equal to 10 times Zo1 (Zi2 ≥ 10 Zo1). Low cut frequency less than or equal to 20 Hz (fcb2 ≤ 20 Hz). Maximum symmetric excursion. Use a 2N2222A (NTE123A) transistor. Also, determine the value of the impedance output (Zo2) of the designed circuit.
A source with equivalent noise temperature Te = 850 K is followed by a cascade of three amplifiers shown in Table 1.0. Assume a bandwidth is 40 kHz, evaluate the overall noise factor and noise figure of the cascade. In order to get better performance of the amplifier system, you may try to re-arrange the amplifier units. Please prove and justify which arrangement is the best to be chosen.
The front end of a television receiver, having a bandwidth of 7MHz and operating at a temperature of 27°C, consists of anamplifier having a gain of 15 followed by a mixer whose gain is 20.The amplifier has a 300-Ω, input resistor and a shot-noiseequivalent resistance of 500-Ω; for the converter, these values are2.2 and 13.5 kΩ, respectively, and the mixer load resistance is 470kΩ. Calculate Req for this television receiver.
Design a difference amplifier shown in the following figure to meet the following criteria: vo = 2vb - 5va. The resistance seen by the signal source vb is 750 kΩ, and the resistance seen by the signal source va is 16 kΩ when the output voltage vo is zero. (Figure 1) Specify the value of Ra Specify the value of Rb Specift the value of Rc Specify the value of Rd
Assume that the numerical values for the voltage areVm=50 mV and t1=1 s. We apply this voltage to the integrating-amplifiercircuit . The circuit parameters of the amplifier areRs=100 kΩ, Cf=0.1 μF, and VCC=6 V. The capacitor’s initial voltage is zero.1. Calculate vo(t).
Determine the Voltage, Current and Power Gain of an amplifierthat has an input signal of 1mA at 10mV and a correspondingoutput signal of 10mA at 1V. Also, express all three gains indecibels, (dB).
Consider an RC coupled amplifier at low frequency. Internal voltage gain is -120. Find the voltage gain magnitude when given that collector resistance = 1kΩ, load = 9kΩ, collector capacitance is 0. is 0.1μF, and input frequency is 20Hz.

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