Response Definition and 486 Threads

Homework Statement We did a lab analyzing this inverting, negative feedback circuit for a 741 op-amp: We measured the closed-loop gain and phase shift of the signal for several values of the input frequency with R_2/R1=1000,R_2/R1=100 and R_2/R_1=10. The gain curves all looked like...

Hi people. I started my AC circuits course in college, but this stuff is either too tough or I probably don't have some math prerequisites. By the way, I'm just starting my differential equations course, but I haven't had any time to study just because AC circuits won't let me make any...

Hi all, I'm taking a fourth year time-series analysis course for Physics students. Homework Statement Let us consider a simple physical system consisting of a resistor (with resistance R) and an inductor (with inductance L) in series. We apply an input voltage a(t) across the pair in...

i have a coax cable that will be used in data transmission. i have measured the open and short impedance and then characteristic impedance(Zo) for the cable. Eventually I will have a transmitter with Z_source in one end of the cable and receiver with Z_load at the other end of the cable. Is it...

I’m interested in audio design and was messing around with NI Multisim building some basic filters. I created a 2nd order low pass filter with capacitors and found that the 2nd stage of the filter impacts the frequency response of 1st filter as illustrated below. This would seem to indicate...

Homework Statement IIR filter with poles at .7±j0.2 and zeros at 0.2±j0.7 Calculate H(f) and the Differance Equation when the DC gain |H(f=0)|=4 The Attempt at a Solution I know to find H(f) I can evaluate H(z) along the unit circle. so H(z) evaluated at z=exp(j2pifT) However...

Not really sure whether this question belongs here or not (if it doesn't, help move?). So I was reading my electronic circuits textbook and am at the section of underdamped RLC unforced response, and the book mentions the natural response as v_{n} = e^{-\alpha\cdot t}(A_{1}\cdot...

Im struggling to do the following question. Any help would be appreciated A following system has the following difference equation y(n)+ 1/8y(n-1) - 5/8y(n-2)=1/2x(n-1) First part is to calculate the system transfer function using the z transform. Then get the frequency response and...

I undestand the following concerning the frequency response function; Frequency response function is a fundamental measurement that isolates the dynamic properties of a mechanical structure. It describes the input output relation between two points of a structure as a function of...

Homework Statement The question gives a transfer function. and we are asked to put it into pole zero form and then we are asked to sketch the positions of the poles and zeros of the system on the complex plane and then sketch the impulse response corresponding to each pole. i have...

An input of 2.δ(t) is applied to a system and produces the response y(t)=6.e^-2t - 4.e^-3t Find an expression for the systems frequency response. The method used would be great too. I know there's some Fourier transforms involved.

In my ODE course I learned that for a time invariant operator p(D), if p(D)x=q(t) then p(D)\dot{x}=\dot{q}(t). Then the professor "justified" that the derivative of the unit step response, v(t), is the unit impulse response, w(t), because the derivative of unit step function is the Dirac...

Hi I am a bit unsure about terminology and method, so I would like to discuss this with anyone who knows anything about this. I'm examining the properties of a network of parallel capacitors. I have calculated an impedance versus frequency curve, Z(f), using complex impedance of the...

Why is frequency response an important characteristic of an amplifier? in this situation we are using a transistor and had to calculate gain using specified frequencies and the resulting voltages through our circuit. My understanding of contemporary electronics is not as strong as i...

Hi, I've done a response surface analysis, resulting in an equation of the form: P= A + B*X + C*X^2 + D*Y + E*Y^2 + F*X*Y Where A,B,C,D,E, and F are known values. I want to rearrange the equation so I can get a polynomial describing when P=0, but I'm stuck. Any suggestions...

for a given spring/damper system the equation of motion is: [PLAIN]http://img600.imageshack.us/img600/2140/equation1.png where x is the displacement of a mass from a fixed point d is a damping constant L1 and L2 constant lengths k1 and k2 are 2 spring constants...

Homework Statement In the circuit shown below the switch has been opened for a very long time and closes at t = 0. Calculate the output voltage VO at: 1: t = 0−; 2: t = 0+; 3: t = t1 = 24 µs; 4: t → ∞. In the circuit shown below the switch has been closed for a very long time and...

Homework Statement In the circuit shown below the current source has been switched on for a very long time. Find the DC current in the inductor and the DC voltage across the capacitor. The attempt at a solution I replaced the inductor and the capacitor with a short circuit and...

I'm trying to figure out how to calculate collision response in a simulation I'm working on. Here are the details: 2D Objects are made of axis-aligned edges and do not rotate Object masses are whole numbers Collisions are completely inelastic No friction Collision/separation times are...

Homework Statement x(t) is input, h(t) is the impulse response, y(t) is output Find the system response to the input x(t) x(t): http://img10.imageshack.us/img10/5157/55570988.jpg h(t): http://img593.imageshack.us/img593/1079/52492104.jpg Homework Equations Now I know the...

Homework Statement A world-class runner can complete a 100 m dash in about 10 s. Past studies have shown that runners in such a race accelerate uniformly for a time tu and then run at constant speed for the remainder of the race. A world-class runner is visiting your physics class. You are to...

I am reading a book on Control Theory by Norman Nise. I don't get his description of forced and natural response based on poles and zeroes. I have posted a screenshot of the page http://www.flickr.com/photos/66943862@N06/6134272368/sizes/l/in/photostream/" . I understand upto Eq 4.2...

I have a question about how the solid respond to stress at different stages. In textbooks the slope of typical stress-strain curve decreases after a point called yield point. Why is it so? Why less stress is required to further increase the strain compared to that before yielding?

Homework Statement http://img534.imageshack.us/img534/9687/rlc.png Cannot do this question, the first part confuses me when it asks to find an equivalent Parallel circuit. My first instinct was to try to add the capacitor and inductor and 40k Resistance together to create an RLC series...

Can anyone introduce, what is linear response theory in quantum mechanics? Or suggest, where i could read about it, to get acquaintance with it?

Seriously. Wait--what? http://emergency.cdc.gov/socialmedia/zombies_blog.asp

Homework Statement A first-order system G(s)=\frac{k}{s+a} and its response to a unit step input are shown in the figure below. Determine the system parameters a and K 2. The attempt at a solution I’ve tried to find K & a using MATLAB and read a lot but didn’t find...

An underdamped waveform has the general form Ke-\sigmatsin(\omegat - \varphi) From the graph, determine K, \sigma, \omega, and \varphi i know f = 1/t t = .004 s f = 250 Hz \omega = 2\pif \omega = 1570 \varphi is clearly 0 How do i determine K and \sigma??

US Kills Osama so in Response, the Taliban Attacks... ...Pakistan? Really? http://www.usatoday.com/news/world/2011-05-13-pakistan-bomb_n.htm Nothin says "marginalized" like attacking an innocent and unwilling bystander in the raid on Bin Laden instead of attacking those who killed him...

I'm trying to marry the concepts from my EM course with what I've been doing in my lab course. Correct me if I'm wrong, in a plain RC circuit, when closed with a DC source, the capacitor initially acts as a short (voltage is zero across the terminals, while I is max), until after a few...

multiply freq response by "w" ?? hi all, i am not able to proced to this problem lets say there is a signal x(t), which has freq domain representatiojn of X(w) lets say signal is periodic with T = 1 now in freq domian X(w) is multiplied with "w" for 0<w<2 then what would be...

How would u work this problem? Q-If a RTD has a time constant of 10.0secs, approximately how long will the sensor take to get with 5% of the final value? I am thinking two ways to approach this problem. S1- It is known that the RTD takes 5 time constants to reach its final value, hence...

This isn't really a homework question but I felt this is the most relevant section for this. I therefore apologize for not following the standard post template. I was going through my electrical engineering notes on frequency response functions. It was explaining how to plot frequency response...

I need someone to tell me if what I am saying is true or BS? Switching Frequency: Is simply defined as the frequency (amount of times) the same operation occurs, in our case the amount of times per second each phase is switched on. Duty Cycle: is thought of as the time the object is on...

There is much that I do not know specifically about this incident or about TEPCO’s policies and procedures for these events. I am not interested in assigning blame. Japan has authorities to handle that. A great deal of reconstruction, establishing timelines, evaluating communications, etc...

Homework Statement In attachment Homework Equations i don't understand why it would be asking for the current going through the capcitor, in a dc circuit it should be an open circuit but there will be a voltage over it... after searching through lecture notes and textbook can't find...

hi, i have trouble in understanding the concepts of the impulse response first of all, let's assume that we have a signal y[n] = x[n] which is time invariant and linear, hence if I understand correctly linear means that if for input a*x1[n] we have an output a*y1[n] b*x2[n] we...

I am trying to teach myself DSP, owing to bad lecture notes. In particular at the moment I'm trying to calculate impulse responses for LTI systems, given the system equation. I would really appreciate it if someone could tell me if my working and assumptions below are correct for the following...

Homework Statement i have this graph http://img858.imageshack.us/img858/1346/56954457.png and i need to find h-1[k] i don't understand, i know that the impulse response is the response for input -> δ[n], in this case it will be δ[n+1], but i don't understand how to calulate the response...

Find h[n], the unit impulse response of the system descrived by the following equation: y[n]+3y[n-1]+2y[n-2]=x[n]+3x[n-1]+3x[n-2] Can this be rewritten as?(n-->n+2) y[n+2]+3y[n+1]+2y[n]=x[n+2]+3x[n+1]+3x[n]

If we have a linear system(it could be a RLC circuit) with the following differential equation: d2y/dt2+7*dy/dt+12*y=dx/dt+5*x So H(s) = (s+5)/((s+4)*(s+3)) = -1/(s+4)+2/(s+3)--> h(t) = (-e^(-4*t)+2*e^(-3*t))*u(t) (Please calculate the unit impulse response by Laplace transform and verify the...

Homework Statement The open loop transfer function to a unity negative feedback system is given as: G(s)=50/s(s+10) Homework Equations Unity feedback is used in this problem, and the system input is a step function. Y(s)=50/s(s^2+10s+50) The Attempt at a Solution I have...

Homework Statement Heres the question, I honestly don't know where to even begin :( An AC model of a cascode common-source amplifier is shown below. M1 and M2 are biased in saturation mode. The parasitic capacitors in the transistors are included. Determine the poles in frequency response...

Homework Statement Find the impulse response of the following: Assume the system is initially at rest. y[n] - (1/2) y[n-1] = x[n] + 2 x[n-1] + x[n-2] The Attempt at a Solution To find the impulse response y[n]: we know that y[n] = homogenous solution + particular solution so... lamda -...

Homework Statement So the problem asks to find the impulse response h(t) provided y(t) = integral from -infinity to t of e^-(t-tau)*x(tau-2)dtau Homework Equations none The Attempt at a Solution I understand that the way to begin this problem is to substitute delta(t) for x(t). Therefore the...

Hello All, I have a bit of a problem with a series RLC circuit with no supply voltage. In the process of actually solving the second order differential equation for the voltage across the capacitor I have lost a handle on what it actually represents in terms of the circuit. I have attached...

EM response function of the "Phase Action" of a BCS superconductor Hello, I am looking for a paper in which people calculated the EM response of phase action of A BCS SC. In the book "Condensed Matter Field Theory" by Altland and Simons, on page 393 they mention such a thing in the discussion...

Homework Statement Derive the Voltage and Current equations for Step Response of an RC circuit. Homework Equations End products will be Vc(t) = i(s)R + (Vo - i(s)R)e^(-t/RC) and i(t) = (Is - (Vo/R))e^(-t/RC) The Attempt at a Solution Using KCL on a hypotetical RC circuit with a...

Homework Statement Find the unut impulse response h[n] of this system y[n+1]+2y[n]=x[n] Homework Equations I have no clue on how to slove this problem, som pointers would be nice. Thx

i am given the Laplace transform of an impulse response function, as well as its input. i am supposed to find its output. H(s) = 1/s2 + s + 1 x(t) = sin2(t-1)U(t-1) what i have done so far is the following: i know that Y(s) = H(s)X(s) and from this i can easily find y(t) so i found X(s)...