(1) base and collector currents and voltage drop at C-E, if resistances visible in the circuit have been changed to: Rc = 40 [kN], RE= 10 (kn] and Ru = 250 (kN]. (ii) and the transistor saturation current (what the transistor saturation condition must be met).
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Q: The common collector amplifier circuit has neither Rc nor CE. why?
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A: To write the primary function of BJT:
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A: Solution - The DC equivalent circuit of the given figure is shown below,
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A: IC and VCB for the given circuit is calculated as shown below
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A: according to question we have to define the difference between the D-MOSFET and E-MOSFET.
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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.4) By drawing the small signal model of the circuit given below, we can determine the total voltage and current gain values of the circuit, without the bypass capacitor on and without the bypass capacitor. Calculate separately for the two cases as it will be in the circuit (connected to the emitter end of the transistor). (β = 100, rS = 600 Ω, R1 = 27 KΩ, R2 = 4.7 KΩ, RC = 3.3 KΩ, RE = 680 Ω, RL= 15 KΩ, VCC = 10 V)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 IC
- 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.The common-emitter amplifier given in the figure in the circuit, Vcc=9V, R1=27kΩ, R2=15kΩ, RE=1.2kΩ and RC=2.2kΩ. Transistor β=100 has value. a-) If it has values of Rsig=10kΩ and RL=2kΩ Calculate the IE of the amplifier. b-) For small signal analysis of transistor Find the value of Rin by deriving the π-model c-) Calculate vo/vsig and io/ii.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.
- Figure 2 shows a typical BJT amplifier, with its parasitic capacitances displayed. The current gain of the transistor is B=150 and the voltage gain of the amplifier is Am =-125. The small signal resistances of the transistor are re =16 ohm and r0 = infinity, respectively. The values of resistors and capacitors in the figure are: R1 =80 kohm, R2 =20 Kohm, Rc = 2 Kohm, RE = 2 Kohm, Rs =50 W, RI=5 kohm, Cs=2 uF, Cc=2 uF, Ce =10 uF, Cbc =4 pF, Cbe = 10 pF, Cce =1 pF, Cwi = 4 pF, CWO = 9 pF, and Vcc = 20 V. a) Sketch a simplified circuit diagram of Figure 2 for high frequency analysis. b) Using the concept of "Miller effect capacitance", calculate the input and Output Miller effect capacitances of Figure 2, respectively. C) Determine the upper cut-off frequency of Figure 2 that is imposed by its input network only. d) Explain briefly the possible ways to increase the upper cut-off frequencv of this amplifier.If the circuit of problem 2 is configured as a common-emitter amplifier, calculate the resulting voltage and current gain. Assume a load resistor of 1k ohm. Circuit of problem 2: determine the operating point of a universal trasnsistor DC bias cirucit when Vcc=15V, R1=10k ohm, R2=2.2k ohm, Rc=680 ohm, Re=100 ohm. Assume beta (b)=200 and Vbe=0.72V.In 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.
- A common emitter amplifier is given in the circuit in the figure. The current gain β of the transistor in the circuit is 50 a.For Rb = 100 kΩ and Ib = 60mA, find the currents Ic , IE and the voltage falling on the load resistor Rc. b.For Rb = 50 kΩ and Ib = 120mA, find the currents Ic,IE and the voltage falling on the load resistor Rc. c.Find the α (alpha) and γ (gamma) current gains of the transistora) 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=610ΩSince 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.