Microelectric Circuits 9

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (For the circuit shown below, find the values for Re and Rc to establish a collector current of 0.6 mA and a reverse-bias voltage on the collector-base junction of 2.2 V. Assume alpha is approximately e ...continues

Microelectric Circuits 10

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (For the circuit shown below, beta = 80. What is the value of Ic?) My solution is: Beta=80 Vbe=.7 Solve for Ic Step one: Vbb=+15*Rb2/(Rb1+Rb2)=15*50/(100+50)=+5 step two Rbb=Rb1//Rb2=(100*50) ...continues

A BJT having beta = 80 is biased at a dc collector current of 1.2 mA

A BJT having beta = 80 is biased at a dc collector current of 1.2 mA. Vt = 25 mV. Find the value of gm at this bias point. a. 24 mA / V b. 36 mA / V c. 48 mA / V d. 60 mA / V

Microelectric Circuits 12

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (The transistor in the circuit shown below is biased with a constant current source I = 1.2 mA and has beta = 120 and Va = 100 V. Find the dc voltage at the base.) My answer: I=1.2 mA Beta=120 V ...continues

Microelectric Circuits 13

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (For the circuit shown below, find the largest value that Rd can have while the MOSFET remains in saturation. Id = 0.5 mA, Vd= 1 V. The NMOS transistor has Vt = 2 V.) My answer is Id=.5mA Vd=1 Vt= ...continues

Microelectric Circuits 14

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (For the amplifier shown below, let Vdd = 5 V, Rd = 12 k ohms, Vt =1 V, k'n = 25 µa/V2, W/L = 20, Vgs = 2 V and lambda = 0. Find the dc current Id and the dc voltage Vd. ) My solution: Id=(k'n*Vt*W ...continues

Microelectric Circuits 15

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (For the circuit shown below, find Vs and Id. The MOSFET has k'n(W/L) = 0.5 mA/V2 and Vt = 3 V. Assume lambda = 0.) Solution: The only way I could solve this problem was by trial and error using p ...continues

Microelectric Circuits 17

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (For the differential amplifier shown below, beta = 80. Evaluate the overall voltage gain vo/vs (neglect the effect of ro).) My solution: Rei=re2=Vt/Ie=25mV/.5mA=50 Ohm Rid=2(Beta+1)*(Re+Re) =2* ...continues

Microelectric Circuits 18

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (For the circuit shown below, Vcc = 6 V. Assume that Vbe is approximately 0.7 V and neglect the effects of ro and the finite beta. Find the value of R that results in Io = 1 mA.) My answer is: Vcc ...continues

Microelectric Circuits 19

Please check my work and if incorrect give me the correct answer An MOS differential amplifier utilizes a bias current of I = 20 µA. The devices have Vt = 1V, W = 120 µm, L = 6µm, and µnCox for this technology is 25 µA/V2. Find gm. a. 0.04 mA/V b. 0.05 mA/V c. 0.06 mA/V d. 0.07 mA/V My answer is: I=20 microA ...continues