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

A first-order circuit, having a gain of 10 at dc and a gain of 1 at infinite frequency, has its pole at 20 kHz. Find its transfer function.

A first-order circuit, having a gain of 10 at dc and a gain of 1 at infinite frequency, has its pole at 20 kHz. Find its transfer function. a. (s + 4pi x 105) / ( s + 4pi x 104) b. (s + 4pi x 104) / ( s + 4pi x 103) c. (s + 2pi x 105) / ( s + 2pi x 104) d. (s + 2pi x 104) / ( s + 2pi x 103)

Microelectric Circuits 21

Please check my work and if incorrect give me the correct answer 21 A common-source FET amplifier utilizes a resistance Rs of 2 k ohm bypassed by a capacitor Cs. It is found that the pole and zero due to Cs are at 100 rad/s and 10 rad/s, respectively. Find the value of Cs. a. 25 µF b. 50 µF c. 75 µF d. 100 µF My ...continues

Microelectric Circuits 22

(See attached file for full problem description) --- For the circuit shown below, Rs = 4 k ohms, R1 = 8 k ohms, R2 = 4 k ohms, Re = 3.3 k ohms, Rc = 6 k ohms, Rl = 4 k ohms, and Vcc = 12 V. gm = 45 mA/V, Cpi = 12.8 pf, Cµ = 2 pf, R'L = 2.6 k ohms. Use the Miller-effect method to determine the dominant high-frequency pole. ...continues

Microelectric Circuits 23

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (The noninverting op-amp circuit shown below has the following characteristics: open-loop gain A has a low-frequency value of 105 and a uniform -6db/octave rolloff at high frequencies with a 3-dB freque ...continues

Microelectric Circuits 24

Please check my work and if incorrect give me the correct answer Please refer to the problem stated in the attached file. (The op-amp shown below has a uniform -6dB/octave high-frequency rolloff with f 3db = 2 kHz. A = 5000 V/V, R1 = 1 k ohm and R2 = 1 megohm. Find the 3-dB frequency of the closed-loop gain Vo/Vs.) Solu ...continues