For the differential amplifier in Figure P 11.31 the parameters are
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Microelectronics: Circuit Analysis and Design
- 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_forward4--In the given circuit, n MOSFETs are used.Q1, Q2,….. Parameters of Qn MOS transistors Vt=1V, γ=0, λ=0,μnCox=200μA/V2 and (W/L)1=(W/L)2=….=(W/L)n=20a) VGS=?, ID=?, gm=?b) Find the input and output impedance.c) Find the voltage gain.arrow_forwardThe ac equivalent circuit for an amplifier is shown . Assume the capacitors have infinite value, RI = 750 Ω, RB = 100 kΩ, RC = 62 kΩ, and R3 = 100 kΩ. Calculate the voltage gain and input resistance for the amplifier if the BJT Q-point is (40μA, 10 V). Assume βo = 100 and VA = 75V.arrow_forward
- The ac equivalent circuit for an amplifier is shown. Assume the capacitors have infinite value, RI = 100 kΩ, RG = 6.8MΩ, RD = 50 kΩ, and R3 = 120 kΩ. Calculate the voltage gain for the amplifier if the MOSFET Q-point is (100 μA, 5 V). Assume Kn = 450 μA/V2 and λ = 0.02 V−1.arrow_forwardFind the short-circuit time constants and fL for the common-source amplifier As Shown if ID = 1.5 mA and VGS−VTN = 0.5 V. Assume λ = 0.015/V. The other values remain unchanged.arrow_forward1. For an electronic device operating at a temperature of 17°C with a bandwidth of 10 kHz, determine:a. ThermalnoisepowerinwattsanddBm.b. Rmsnoisevoltagefora100Ωinternalresistance. 2. Two resistors, 20 kΩ and 50 kΩ are at ambient temperature. Calculate for a bandwidth equal to 100 kHz, the thermal noise voltage for the tworesistors connected in parallel.arrow_forward
- The common-emitter discrete amplifier shown has the following values: RB1 = 400 kΩ, RB2 = 100 kΩ, RC = 4 kΩ, RE = 500 Ω, Rsig = 1 kΩ, RL = 10 kΩ and VCC = 15 V. Assume VBE = 0.7 V and β = 90. Also assume that the capacitors are shorts for ac. The bias circuit has been analyzed and IC = 1.65 mA, Rin = 1.34 kΩ and Rout = RC. If vsig = 10 mVpeak, determine the peak value of vout.arrow_forwardSOLVE 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.arrow_forwardThe ac equivalent circuit for an amplifier is shown. Assume the capacitors have infinite value, RI =750Ω, RB =100 kΩ, RC =100 kΩ, and R3 =100 kΩ. Calculate the input resistance and output resistance for the amplifier if the BJT Q-point is (75 μA, 10 V). Assume βo =100 and VA =75 V.arrow_forward
- 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.arrow_forwardConsider the common-source amplifier shown in Figure P11.50. The NMOS transistor has KP=50 μA/V2, L=5 μm, W=500 μm, Vto=1 V and rd=∞.a. Determine the values of IDQ, VDSQ and gm. b. Compute the voltage gain, input resistance, and output resistance, assuming that the coupling capacitors are short circuits for the ac signal. Repeat Problem P11.50 for an NMOS transistor having KP=50 μA/V2, W=600 μm, L=20 μm, Vto=2 V and rd=∞. Compare the gain with that attained in Problem P11.50.arrow_forwardFor a non -inverting operational amplifier, Rf = 80 kΩ , Ri = 6 kΩ fT = 2.35 MHz, Determine the closed loop lower critical frequency fc(cl) in kHzarrow_forward
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