Common emitter amplifier. (a) 5. Consider the CE amplifier below. What is the voltage gain and output impedance of the amplifier? Design the voltage divider bias network RB1 and RB2 to set the operating point at Vc=2.5V so that RB1+ RB2 =100K. Determine the resulting input impedance of your amplifier seen at the input vi. 5V RBl Vi RB2 Rc =10K RE =1K
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- In the common-emitter amplifier circuit shown in the figure, Vcc=9V, R1=27kΩ, R2=15kΩ, RE=1.2kΩ and RC=2.2kΩ. The transistor has β=100.a-) If Rsig=10kΩ and RL=2kΩ, calculate the IE value of the amplifier.b-) For small signal analysis of the transistor, find the value of Rin by deriving the π-modelc-) Calculate vo/vsig and io/ii.The dc bias circuit for a common emitter amplifier is shown in the figure. In the circuit, Vcc=15v,RB1=20k Ω,RB2=100k Ω,Rc=5.1k Ω,and RE1=1k Ω, Assume that when the transistor is on, the voltage drop from base to emitter VBE=0.7v. Also assume that β= ∞, which implies that the base current can be considered zero (IB=0) in your calculations. Solve for the base voltage VB. Solve for the emitter voltage VE. Solve for the emitter current IB. Solve for the collector current ICthe 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.
- For the amplifier as shown, VDD = 12 V, VSS = 12 V, ISS = 20 μA, and RD = 820 kΩ. Assume IDSS = 1 mA and VP = +2 V. (a) What are the output voltages υo for the amplifier for υ1 = 0V and υ1 = 20 mV? (b) What is the maximum permissible value of υs?Design a Single-Stage Common Emitter Class A Amplifier Specifications:Voltage Divider Bias Circuit Supply: Any value from 10Vdc to 24VdcLoad: 1kΩVoltage Gain: Any value from 80 to 400Lower Cutoff Frequency: 100 HzSinusoidal source (zero internal resistance): 50mVp-pTransistor: Si, β = 75 • Base-Collector capacitance = 8pF • Base-Emitter Capacitance = 25pF a) compute for the biasing resistances.b) determine the dc transistor terminal voltages and transistor currents.a) Differentiate between Common Emitter (CE), Common Collector (CC) and Common Base (CB) amplifiers. b) Do the DC Analysis of the circuit below and find out the DC collector voltage?c) Do the AC Analysis of the circuit below and find out the AC collector voltage?R1=30kΩΩ=610Ω
- 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.SOLVE NUMBER 2 .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.What is the voltage gain of the common-emitter amplifier as shown? Assume βF = 135, VCC = VEE = 10 V, R1 = 20 kΩ, R2 = 62 kΩ,RC = 13 kΩ, and RE = 3.9 kΩ.
- In 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.Since the transistors used in the circuit are B=100, ro=∞ a) Find the re1, re2 resistance values by performing the DC analysis for each amplifier stage separately. b) Draw the AC equivalent circuit of the amplifier circuit. c)Find the input and output impedance values for each amplifier stage. d) Find the voltage gains AV1, AV2 for each amplifier stage. e) Find the voltage value VL by finding the AV1 Voltage gain.A common emitter amplifier as shown in Figure Q2 has the following parameters, β = 100, R1= 33K, R2 = 10K, RC = 3K3, RE = 1K, ro = and VBE = 0.7 V.State all assumptions made.i. Check whether βRE>>10R2 is satisfiedii. Use the appropriate approach of analysis to determine the Quiescent point; IBQ,ICQ and VCEQ.iii. Draw the small signal equivalent circuit. Determine input impedance, Zin, outputimpedance, Zout, and the voltage gain, AV, if RL=20kΩ.