Input Definition and 586 Threads

hi guys, this is my first post, but I've read many. so my problem is actually for an engineering class, but it's more math/physics related. i took DE last semester and i know how to solve linear eqs but the step function/force is throwing me for a loop. 1. Homework Statement we are given a...

Hi friends, I have a system (with unknown properties) which takes an input vector of length 10 and outputs a vector with length 6. I select Inputs vector 'I' which is a 1000x10 matrix, : 1000 samples of 10 elements. And outputs vector 'O' is a 1000x6 matrix,: 1000 samples of 6...

Hi all, ME major here that's very confused about the integrating op-amp. It's pretty simple what I am confused about, just unit problems. Suppose you have the following integrating op-amp circuit: Feedback capacitor: 10μF Input Resistance: 10kΩ Input Voltage: 5V[sin(100t)] My...

Hi, I'm trying out this sample input file from this website (http://www.phoenix-int.com/~AnalysisServer/FileWrapper/example.html), but I couldn't get the same output as shown. Below are my input and output files: INPUT FILE...

Homework Statement In the above diagram, iin(t) = -0.5u(-t) + 2u(t) A R = 2 Ω L = 1 H C = 8 mF Find the zero-input, zero-state, and complete responses of vC(t) and iL(t) for t > 0. Homework Equations σ = R/2L for series RLC circuits ωn = 1/(sqrt(LC)) for RLC circuits ωd =...

Hey everyone, I have built a circuit which includes a PIC. The logic is that if a specific pin gets a logic 1, the output pins will be activated and LED lights will flash. I am controlling the input pin with a magnetic reed switch. It was working great few days ago. However today the output...

I am self educated. I have created the Grand Unified Field Theory. I wrote a paper explaining the Theory in under 500 words. I have made that paper public. I would like to share it with other scientists. The rules on these forums clearly state not to use this place to share unpublished papers...

Homework Statement A particular inverting op-amp has a gain of -100 V/V, and an input resistor 100 K. The output voltage is 9.32 V when measured with the input open and has a 9.10 V. when measuring with the input grounded. What is the input offset voltage and bias current? The circuit is...

1. With the circuit provided determine the small-signal input and output resistances of the circuit. 2. I was either given or found all the following info for the circuit: VA = 110V β = 115 T = 300k quiescent base current is 12.0 microA R1 = 12 kOhms, R2 = 6 kOhms and Rc = 2 kOhms Ic =...

Hi! My transmitter send a signal with BWsignal=17KHz.. The receiver has an antenna with BWantenna=30MHz... I work in a laboratory so T~300k.What is the Input Noice to receiver? P=KTBWeq=>-174(dBm/Hz) + 10logBWeq BWeq? what is this? What i will see in my S.A?it depends from the...

I was just curious. I have a program that asks for input file name and output name when the console is executed. I needed to run it and automatically pass these file names. I found a way.. test.exe <files.tmp where files.tmp has 2 lines. First line is name of input file, second is output...

Hi everyone, In the past I learned very good things about electronics and PIC controller in this forum. After that I have decided to design a circuit with a PIC micro-controller and simulated it in Proteus. However it doesn't work. Could you have a look and tell me what I am missing? The...

Hi, The book I'm reading references the fact that the impedance seen by the inverting input of an inverting amplifier is just the two feed back resistors, R1 and R2 in parallel. I'm having trouble seeing this. I understand how the basic voltage divider with one end at Vin and the other...

Homework Statement Homework Equations Superposition Non-inverting OPAMP: V_out = (1 + R/R)V_in = 2*V_in2 Inverting OPAMP: V_out = -V_in V_os = 2.5mV The Attempt at a Solution 1. V_in enabled, V_os disabled V_out1 = -V_in 2. V_os enabled, V_in disabled To get V_out2, use the non inv...

So I've been lurking here for a while now, always checking other's solutions but this one has just got me stumped. Skill level: 3rd year electronic circuit design (about the level expected in Sedra & Smith from chapter 3 onwards) Homework Statement For the MOSFET differential amplifier in...

The textbook of which I am interested in obtaining some input are the following: Cohn- Measure Theory Wheeden and Zygmund - Measure and Integral Folland- Real Analysis. Let me be frank here, I am looking for the easiest textbook. I will be working through the text for a self-study...

Hello PF! I've been quite busy on my faculty, doing my academic final work. Anyway I need somebodies expertise which involves analog multiplexers. I am using MPC506 Datasheet http://www.ti.com/lit/gpn/mpc506 I tested it and gives nice result at 5 MHz sine wave, which is more than good for...

So I am well familiar with how bi-state logic (with 0s and 1s) works in gates. 0+0=0; 0+1=1+0=1+1=1 etc. What happens if an input to a gate is neither 0 nor 1, but has an high-impedance value? Will it disable the logic gate from working? Will the logic gate simply ignore that input? Anyone...

A 1200kg car goes a distance of 12 meters on a road, going from 4m/s to 18 m/s in 6 seconds. If 75,000J of energy is used as heat energy, calculate power in/out and efficiency. I believe I found the correct power output, by doing (.5)(1200)(14^2)/6 = 19600W, but I don't know how to find...

Hi, I'm writing a program for nqueens where inputs will be n and possibly a few existing queens already placed on the board. So far I've come up with one method, but got stuck on the second one. (hoping second method is more efficient) 1st method: - tabulate possible outcome of (n*n...

Hey guys, I need to have a signal alternate between two inputs for coax connectors based on a trigger. Do you guys have any idea where I could find this type of hardware or how to construct it? I come from a physics background, so I haven't worked with many circuits. Thanks

Why should the input follow the exact output in control systems (Transfer function). What if my system is an amplifier ? shouldn't that means that the output is the input * gain ? I can't understand the differences between dealing with a real system ( such as an amplifier) of dealing with a...

How can I set a Input file for a slab(2D) of material in Quantum ESPRESSO. And what is the difference between the input of bulk material (3D) and slab (2D) of the material ?

If an iron rod, inside two coils, incurs current going through the coils in the same direction, then the rod will increase in length and then it will begin to reduce in length. This is due to the magnetostrictive properties of the iron. When the currents oppose each other, so as to cancel...

Hi all, I am getting confused about how to calculate steady state error in a system. My particular transfer function is: G(s)= 4.992/(s^2+3s-1) Firstly, with an input step am I right in saying that the Steady State error will always be zero? If so can someone explain the reason behind this...

In the design of a State Space controller using state feedback the input to the plant is given as (where y=x & D=0): u=-Kx If there is a "reference input" then it would be: u=-Kx+r So the state feedback without the reference input simply drives all of the state variables to zero. When there is...

I have everything correct, that is when I put in a value for n=10 I get the right results however I want to enter in more than one number at a time to give me three different results like a vector like [ 10 20 30] but I am just clueless as to how to go about this. the dots are there because i...

Hello, Homework Statement A gearbox and flywheel are as shown in FIGURE 4. The output shaft rotates in the opposite direction to the input shaft at 5 times its speed. The gearbox has an efficiency of 92%. If the flywheel is solid, has a mass of 50 kg, a diameter of 1.5 m and is to...

Homework Statement Homework Equations C=Q/V. T = RC The Attempt at a Solution Capacitance is found to be 334.6217 picoFarads (from previous part of question) When input voltage is high, capacitor is charging (falling pink line), then...

I have an un ideal OA aplifier(Amax=-9.975). I have to evaluate its Rinput--> it has to be something like 10*10^10 Ω I need to put a potenciometr after Vin and to "play" with it when I get half of Vout/vin. when do I need to put it? and what is my voltage equations? thanks.

Homework Statement A 2400/240-V, 60-Hz transformer has the following parameters in the equivalent circuit of Figure 6.5: the high-side leakage impedance is (1.2+j2.0)Ω, the low-side leakage impedance is (0.012+j.02)Ω, and Xm at the high-side is 1800 . Neglect Rhe. Calculate the input voltage...

I have prepared the coordinate of a pipe layout in excel. Now I have to input them into a FORTRAN code. Although I know it is possible to generate these coordinates inside FORTRAN, but working with Excel is much easier for me. Making these coordinate data inside FORTRAN is a very hard work and...

Homework Statement In my notes it is stated that an integrator adds a phase lag of -Pi/2 and thus can cause instability. I want to understand what this really means and am deviating from the notes somewhat so do not know if I am barking up the wrong tree. Homework Equations Given a...

I am going to use Fortran and Python as examples of a compiled and a scripting language in this question. If I write a Fortran program and compile it, it is going to process data more quickly than a python script that does the same thing. However, what if I write a Fortran program that...

Hello everyone, I was just going through the manual of my casio fx-350ES calculator to find out how i can input an equation with one variable. let's say the equation below: (t/5)^1.514 t being the variable Then i would like to input a range of values for my variable, t so that i can...

Homework Statement The problem I would like help with is 4.4 which is in the file 4.4.jpg. (The problem requires problem 4.2 which is why I included it as 4.2.jpg.) The solution is included however, I do not understand it since it is very brief and, I don't think I've covered this before...

This is an experiment with gyros on a wheel. First of all, this is not a homework question - I am just a 40 year old man with general interests in physics. Example: I have a wheel. Attached to its circumference, there are placed heavy discs that is aligned tangentially. These discs are...

Hi: when using op amp as differential amplifier, can it used for input signal isolated from power supply of that op amp? as this figure: http://uploadpic.org/storage/2011/k9bEue1EtqkWGlH5yTDN3198.jpg so if the input signal is sinewave 5 Vp.p, will be the output of this op amp...

We have a PC with digital-to-analog converter. With help of this converter we generate “pure” sine: y(t)=A*sin(2π*f*t+ ψ) with industrial frequency 50 Hz. This signal goes as input to electricity generating plant which has a goal to raise this signal and give to its own output. During this...

I was wondering how to convert E=70.7sinwt..<-- (just an example) to something like 50∠0 degrees?

Helo, im doing overloading function. example class a { ... example(int a) ... example(double b) }; int main() { a. b; cout << "Enter value"; cin>>q; b.example(q) } what is q's data type ?

hi , does input light signal for laser amplification has to be provided by the external source or it is created by lasing material itself?

Hi all, I am trying to compare the heat input into an engine with useful work out. I have taken a measurement for Torque, and have calculated heat input per cylinder based on combustion calculations i.e throttle % x cal value of fuel x fuel mass. I am happy with the heat input...

Homework Statement I have a weird boolean algebra expression for which I need to build a circuit using solely the NAND gates. There are 4 inputs A,B,C,D. From the truth table (I do not know how else to approach this question other than constructing the truth table and then trying to fit the...

Hey all, I'm stuck on a dynamic systems question, it's attached as a jpeg I started off by writing nodal equations for each node: Node 1: 1/R1(ei-eA)=C1D(eA-eo)+1/R2(eA-eB) Node 2:1/R2(eA-eB)=C2D(eB) I know that I have to isolate for ei and eo but I'm really confused with...

Homework Statement Alright, so for my engineering programming class I have an assignment where I have to create a program with an array, and then do things with the array, such as create a search function for it, and list how many numbers fall within a certain range, ect, ect. So I...

Homework Statement An inventor claims to have developed an engine which takes in 1.1x108J of heat energy at 400K, and rejects 5.0x107J of heat energy at 200K. Would you advise investing in this project? Explain your answer. Homework Equations W = Q1 – Q2 η = W/Q1 = 1 – Q2/Q1 The...

We can use NAND gate only to get ( XOR gate ) of 2 input ( A and B ) : By using (4) NAND gate : The output of 1'st NAND : (AB)' The output of 2'nd NAND : ((AB)'.A)' = (A'B) The output of 3'rd NAND : ((AB)'.B)' = (AB') The output of the hole circuit will be: ((A'B).(AB'))' = AB'...

I'm having a really hard time understanding input vs. output impedance and also the usefulness of the Thevenin model. Let's say we have a simple voltage divider consisting of two equal resistors. The output voltage is between the resistors. If the input voltage is 10v the output voltage has...

Homework Statement Find the power input of a force \vec{F} acting on a particle that moves with a velocity \vec{V} for each of the following situations. \vec{F} = 4\hat{i} N  + 3\hat{j} N , \vec{V} = 7\hat{i} m/s  \vec{F} = 7\hat{i} N  - 5\hat{j} N , \vec{V} = -5\hat{i} m/s...