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Okay, I've got a differential amplifier biased by a constant current source at the source of each mosfet. There is a resistor R connected to the drain of each transistor and those resistors are also connected to a +5 DC. The second stage is a common source amplifer. The drain of transistor 2...

The problem I am having is that when H(s) and G(s) are multiplied together, a zero is introduced because of the feedback loop. The location of this zero changes as the gain changes. So the gain cannot be varied without moving the zero. Thus every value of gain produces a different root locus.

I had to use state-variable feedback to design a position control system for a motor. I have to design the controller using root locus methods. The gain that is varied is located in the feedback loop as shown in the picture. I am completely lost as to how to generate a root locus with the...

I had to use state-variable feedback to design a control system for a motor. I first designed a deadbeat controller, which was pretty easy. But now I have to design another controller using root locus methods. The gain that is varied is located in the feedback loop as shown in the picture...

motherboard design and microprocessor design is two different worlds. motherboard design is all about putting the pieces together and laying everything out properly. the layout is a major pita. microprocessor design is all about putting components in a specific order to make the micro...

I designed a circuit that has an analog signal conditioning portion, and a digital circuit to make some measurements on the signal. The analog circuit is powered by 15V supplys, thus the output is a 0-15V square wave. The digital circuit needs a 0-5V input. I tried using a voltage divider on...

There are actually more wheel speed sensors besides the ones I discussed my module must work with. I cannot decide what sensors are used, I have to work with what's already existing. I don't quite understand the difference between vehicle ground and the DAQ ground either. The DAQ does ride in...

Thanks for the tip with OrCad, I'll try that next time. These signals are coming from wheel speed sensors. The low-amplitude signal is from a passive sensor. The passive sensor varies with the velocity at which the teeth of the gear pass the sensor as well as the air gap. The air gap should...

This is a horrible representation, I had to make it in paint because I can't post OrCad schematics on here. Should be enough relevant information though.

I designed an analog circuit that transforms a couple of different incoming signals into a digitally compatible signal. I was recently informed there will be a grounding issue at the front of the circuit. The incoming signals will be from a variety of sensors. The first part of my circuit is an...

I was designing a circuit to determine frequency of signals using a counter as the main part of the circuit. However, I was just informed that period must also be measured or have the circuit perform one of the other. Are there ICs that are able to determine the period between rising edges? If...

Need to design a digital circuit that determines the frequency of incoming signals. Incoming signals will vary, but all will be converted to a 0-5 V square wave before going to the digital portion of the circuit. The current idea is to have a counter to count the edges for a certain period of...

Here are a few examples of some of the signals I will be dealing with: sine wave ranging from 0-50 V up to 5KHz square wave with DC offset sqaure wave with extended 'high' times looks like this """""""""|____|""""""""""""""""""""""|____|""""""""""""""""""""""""""""" the frequency at which...

I've got to design a signal conditioning circuit that takes in a few different signals and converts them all to a standard signal. The overall purpose is to determine the frequency of the individual signals. Any ideas on how to make a variety of signals into one standard signal? Preferably a...

I used the equation Vo = V0/A - I1*R2, where I1 = (Vi - -(Vo/A))/R1. Solved it for R1 and got a value of roughly 2500. Is this correct?

I don't undertstand where to go?

G = Vo/Vi = -50 = (-R2/R1)/1+(1+R2/R1)/A This is my equation, I used this when I solved for the 1500 ohms. When I put it in the first time it was a typing mistake. This is incorrect?

heres a crude picture, but it should work.

gain of the circuit is -50 V/V, open loop gain is 200 V/V. There are three resistors in the circuit. The standard R2 and R2 and there is an R3 resistor. Vo is across R3. It is connected to the output of the output going to ground. I need to find a value for R1 to make the gains works. The value...

im still having trouble with this problem. I've tried multiple methods including differentiation and solving for a variable and plugging it into the first equation but I am still where i started the other day. I am trying to find an equation that relates the output voltage across R2 to the...

heres, what i got for an answer : - 2/5 Y2 4th derivative, -32/5 Y2 3rd der. - 6/5 y2 2nd der and + 4 Y2 1st der. is this right?

did i set up the opening differential equations right?

can i get a confirmation that i set up those differential equations properly? I am having some trouble with this still. if i differentiate, than i get derivative of the input. I am trying to find the output voltage which is across the R2 resistor.

can i get a confirmation that i analyzed the system properly? i mean as far as the beginning differential equations.

okay, i got an answer that relates Y2 and F. numerator is 6s^2 +4s + 10 denominator is 12s^4 + 20s^3 + 66s^2 +60s +25. i got the step response using MATLAB but it doesn't look quite right.

this all occurs on a horizontal plane. a force is applied to a 2kg mass (m1). a damper is on the same side of the mass as the force and it is attached to a wall. its value is 4kg/s(b1). a spring is on the opposite side of the mass with a K value of 5(k1). the opposite end of the spring is...

there are two loops in an electrical circuit. I've got two equations and two unknowns. here are the equations v(t) = I1*R1 + 1/c*int(I1*dt) - 1/c*int(I2*dt) - first loop 0 = LdI2/dt + R2*I2 - 1/c*int(I1*dt) + 1/c*int(I2*dt) - second loop the capacitor is in the branch between the two...

i mean, that's the answer to the question right?

just had a thought, if the square root of μr*εr = 5, than μr = 25 correct?

H = 30 sin ( 2*pi*10^8*t - 5*x) in the z direction milli-amp/meter. First question is if μr = 1, find εr. H is the magnetic part of a plane wave in a lossless dielectric. I don't see any way to find εr from the information that's been given.

can somebody confirm my answer?

A 40cmX30cm rectangular loop rotates at 130 r/s in a magnetic field of .06 in the direction normal to the axis of rotation. If the loop has 50 turns, determine the induced voltage in the loop. Heres what I did. I used B dot ds. I had my ds being the sides of the rectangle and coswt in the...

since the current at C is twice at the current at A and B than wouldn't that cancel out the magnetic field?

the only think i can think of is to find the H field about A and B with rho being equal to the distance to C. than use the int(i*dl cross B). do that at A and B ? i don't see how the 150 amp current causes a force at C.

a three phase transmission line consists of three conductors that are supported at points A,B, c to form an equilateral triangle. At one instant, conductors A and B both carry a current of 75A while conductor C carries a return current of 150 A. Find the force per meter on conductor C at that...

oh yea, there's 5 A in the counterclockwise direction

given that B = (6x, -9y, 3z) find the total force experienced by a rectangular loop in the z = 0 plane. 1<x<3 1<y<2 i used the torque equation, but my question is if i have to do the integration for all 4 sides of the rectangle. T = int(dl cross B)

what is that formula for?

an electron with velocity u = (3,12,-4) x 10^5 experiences no net force at a point in a magnetic field B = ((10,20,30)/ Find E at that point. I found the magnetic force by u cross B. Set Fe equal to Fm. Divided by q to get E = u cross B. but I am not getting the same answer as the back of...

where does the sin theta come from in that second step

A square conducting loop of side 2a lies in the z=0 plane and carries a current in the counterclockwise direction. Show that at the center of the loop H = sqrrt2*I/pi*a in the z direction. I am stuck in this problem. Heres what I've got. I placed the center of the loop at the origin. I am...

if the surface charge was not uniform, would the electric field be proportional to the permittivity of the medium?

it doesn't not say the surface charge is not uniform. if its not uniform, than i don't see any way to solve it with the information I've been given. Fixed Question 2 Region y is greater than or equal to 2 is occupied by a conductor. If the surface charge on the conductor is -20 nC/M^2...

if somebody can confirm my answers that would be great. i also have another one i need confirmation on. A conducting sphere of radius a is half-embedded in a liquid dielectric medium of permittivity E1. The region above the liquid is a gas of permittivity E2. If the total free charge on the...

oops, my bad. youre right. its just one.

Gauss' Law another quick question. Region y is great than or equal to 2 is occupied by a conductor. If the surface charge on the conductor is -20 nC/M^2, find D just outside the conductor. Since the surface is y = , than the normal would be in the y direction. and D = Eo*E. but E...

drop from A to B is Vr1 and 2*Vr2. Even though the inductor and r2 voltages are the same, they both must be added.

E = 15 i - 8 k at a point on a conductor surface, what is the surface charge density at that point? assume Eo. surface charge density is just -Eo*E correct? but i take the magnitude of the electric field and than multiply it by Eo. am i right?

that is correct

yep, that looks right. circuits are a snap with a little bit of practice.