Op-amp Definition and 212 Threads

Hello, I am designing an op-amp to be used as a low-pass filter and am using a TLC271. I have attached an image of the topology of the circuit. I found the transfer function to be G(s) = Y(s)/X(s) = 1/(10^-4s + 1). I plotted the bode plot in MATLAB and have attached the result in the...

Homework Statement Select component values to design for corner frequencies at 500 rad/s and 1500 rad/s. Homework Equations KCL, transfer function The Attempt at a Solution Gain: [1] G = 1 + \frac{R_{A}}{R_{B}} Voltage division: [2] V2 = V1\frac{R_{2}}{R_{2}+1/sC_{2}}...

Homework Statement Homework Equations I have two "golden rules" I was given which are "no current into the op-amp" and V_{-} = V_{+} and the open loop gain is infinite Basically my notes and textbooks are leaving me with pretty much nothing though The Attempt at a Solution tried...

I am attempting to build an Op-Amp circuit in which a sinusoidal input is used. Below is the description: An active, op-amp bandpass filter circuit for audio frequency inputs. The implemented filter circuit must provide a maximum gain of 14 dB inside the pass-band and less than 9 dB of...

Good day. Could anyone tell me how to simulate an equivalent Operational Amplifier in Simulink? I read somewhere that I had to do it with 2 adders and a gain block, but I don't know how. Thanks.

1. Please refer to attached image. 2. The attempt at a solution. I noted that Vb was grounded and would therefore be equal to 0 and because one of the two op-amp rules states that Va = Vb, both will be equal to 0. I wrote an equation at node Va: [Va - Vin]/R1 + [Va - Vout]/R2 =...

For some reason I can't get the answer right. It is given as 6 bits but I calculated it to be 5. What am I doing wrong?

Derive a symbolic expression (i.e., a formula containing symbols R1, R2, ..., etc., andarithmetic operators instead of numerical values) for the voltage gain of the amplifier What I am stuck at is the two nodes on each side of R4 I initially disregarded the node to the right of R4, which...

Homework Statement Calculate the value of R2 required to deliver 5W to RL if Vin equals 5V. Homework Equations Vout=iRL P=Ri^2 The Attempt at a Solution I started by using KVL for the input loop, noting that current is going counter-clockwise: Input loop: iR2-Vin=0→R2=Vin/i...

Homework Statement I have uploaded the questions in the attachment. I am having trouble with 2. e,f and 3.c untitled.png is the parts that I am having trouble with. untitled1.png and untitled2.png is the entire question. Homework Equations y(t)= steady state+transientThe Attempt at a Solution...

I'm supposed to be analysing this circuit to go with my lab report. However I haven't seen a circuit like this. First off I'm not sure what the symbol is on the top left resistor (15kΩ//1.2kΩ) means. Secondly I'm used to doing inverting op amps and they generally don't have many/ any...

Hey everyone, Whelp, I've had this project dancing around in the back of my mind for a good six months now and I'm here to ask for some help. I'd like to build this biofeedback device from an old issue of Popular Electronics...

Homework Statement I had an exam question on ideal op-amp asking to find a number of unknowns. I found them all except that I'm skeptic of my attempt in finding the output current which is symbolized on the circuit (io), so I have come to ask to throw my skepticism away. See the circuit below...

Homework Statement http://img502.imageshack.us/img502/4082/vddvss.jpg I'm asked to 1) Develop a formula for Av = Vout/Vin And 2) If the LED was flipped the other way, what must we do for for the rest of the circuit so current would still flow through it The Attempt at a...

Homework Statement [See attached diagram] I'm trying to design a circuit that connects to the input terminals of the noninverting input of this comparator circuit such that: -The input to my circuit consists of a SPST switch and a 9 volt battery -When the switch is thrown on, there would be a...

Question The op-amp selected for the unity gain inverter, has a gain-bandwidth product, and maximum slew rate at its output of 1V/μs[/b] (i) Justify the statement that a high gain-bandwidth product necessarily leads to a high slew rate (ii) The phase sensitive detector is expected to operate...

Homework Statement in the attachment Homework Equations The Attempt at a Solution for q.1) its a voltage follower non-inverting Vcc has to be greater than 5V for the zener diode work? formulas? q2) does anybody know how to use multisim ? if i copy the figure in multisim...

So i found this post about voltage to current conversion. http://www.allaboutcircuits.com/vol_3/chpt_8/7.htmlhttp://www.allaboutcircuits.com/vol_3/chpt_8/7.html It talks about how to convert 1-5V to 4-20mA which is exactly what I am trying to do. I have attached the circuit which I am...

Hello. Here joined is the schematic of a small deflection amplifier. Outputs H0 & H1 are connected to electrodes placed in a vacuum volume. These outputs are protected by varistors. High voltage to collectors is 200 V DC. Sometimes, not very often, the head Op-Amp (LM324) is burnt. The only...

I know this is a comparator, but I am asked for the name of this circuit. Can I just say a comparator circuit, or a comparator op-amp? Or is there a specific name for this circuit arrangement?

Howdy, I'm using the opa2350 op amp to amplify a <1mV signal by 2000. The problem is I want to have a greater gain (either second stage or larger feedback resistor) however the DC level is reaching too high so that it reaches over 2 V, and I need it under 2 V in order for a digital read into an...

Homework Statement I'm studying op-amps at the moment, and I came across a statement and I don't understand it. 'To understand how the inverting amplifier works, you need to understand the concept of the virtual Earth approximation. In this approximation the potential at the inverting input...

Consider an op-amp in which there is a DC voltage of 100mV for example applied to the non-inverting (positive) terminal of the op-amp and the negative terminal of the op-amp is connected to the output directly. Also take the voltage supplied to power the op-amp, Vcc, to be 15V and the gain, A...

True or false: In the following circuit no current flows through R since Vout equals Vin. http://img10.imageshack.us/img10/2263/thehellisthat.jpg I say TRUE because it's the same as Voltage follower My classmate disagrees with me, says it's false, saying "if vout passes through a...

Homework Statement http://img38.imageshack.us/img38/8373/circuit950.jpg At first I thought a comparator, then I noticed a line connecting the Vout and the lines that connect to V- and V+, so it can't be a comparator, can it? I don't see any other option... As far as the question, I...

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...

As the thread suggests, I am trying to amplify the signal from a microphone. Now, I have a circuit which uses 2 op amps with dual supply. That circuit works pretty well. I have to make now, a amplifier using only one op amp, single supply. The sound itself isn't of much...

Homework Statement http://img689.imageshack.us/img689/6668/mycircuit.jpg Given a circuit that includes Operational Amplifiers, double-switch - S, for two situations, 1 and 2. Type of switch - DPDT - Double pole double throw. Two diodes and two lightbulbs, L1 and L2. Given: Voltage...

Well another op-amp thread, while the other one is being cooked. http://pokit.org/get/a09120280ee2f6b6e3de7a99989b8bd9.jpg To speed you up, this is a triangle wave op amp generator. It generates a triangle wave at U2. In general I understand how the circuit works, but from the engineering...

http://pokit.org/get/c2d0bb4355d353d0ff5bc47c7158ce45.jpg Suppose we have an op-amp configured as a comparator. At -ive lead, we are sending the carrier wave, specifically in my example, triangle wave. At +ive lead, we are sending the input signal, the one that we want to modulate...

Homework Statement http://img16.imageshack.us/img16/9341/shtoeta.jpg Find Vout. Homework Equations http://img687.imageshack.us/img687/7393/formulaspage.jpg The Attempt at a Solution This is the first time I see Vin connected to both the + and the -! I scanned my known...

Homework Statement How could an op-amp with feedback be configured so that it would supply a constant current to some load, even if the resistance of the load changed? Homework Equations None. Just a general question. The Attempt at a Solution I don't really know how to approach...

Homework Statement http://img822.imageshack.us/img822/1859/theque.jpg Given the following circuit, including an Op-Amp and a LED diode. The voltage on the LED diode is 1.4 Volt. In your solution assume that the Op-Amp is idealHomework Equations (In the solution...) The Attempt at a Solution...

[PLAIN]http://pokit.org/get/3deef3b185bf6b18007a25ddc18ce7d5.jpg So I have another thread running on op-amps, and while waiting for mr. Jiggy to come back online, I want to ask another op-amp question. This precision diode. I understand what is the point, and why it is so useful...

Homework Statement Given here is an Operational Amplifier, its feeding Voltages are +-10. A) Calculate Vin to get a Vout of -2V, point out the direction of the current in this case (From a to b or b to a) http://img72.imageshack.us/img72/2550/needheed.jpg The Attempt at a Solution...

op-amp --- input voltage Hello, I find op-amps very fun! And I understood mostly everything I was offered to study. But here is the thing. Why does the voltage has to be the same at the input leads? To be more specific. Lets say we have a inverting op-amp. And we have an imput Vin at -ive...

Homework Statement The problem is gives an ideal op-amp and wants me to find the output current of it. Here is a picture of the problem. http://i.imgur.com/NfO6q.png Homework Equations vp=vn in=ip=0 The Attempt at a Solution So what i did is take KCL at the Vn node...

Homework Statement Here's the network: R1=100 The gain ranges from -1V/V ---> -10V/V and the potentiometer R4=10. Is R4 and R3 in parallel with each other? I can't seem to get the right answer... Moreover, this is what was done: -(R2/R1)(1+(R4/R2)+(R4/R3))=-10 Can someone...

Find all Collector currents I don't even know where to start, I added base resistors but am still getting stuck how can I find current in the first transistor?

What is the meaning of differential gain? Iam studying a document that says, opamp can provide differential gain unlike transistor. I don,t know what does it mean. Can some clear me out. More, what is meant by bias volatge in case of op-amp. I am very beginer to electronics.

I am just reading an op-amp datasheet. In that, they have written in features as "RAIL-TO-RAIL OUTPUT SWING" and in Applications as "MULTI-CHANNEL DATA ACQUISITION". What does they mean? Can someone explain me in simple way.

I am drawing a circuit but not getting right result. I am to assemble the circuit below using +-10V supplies with all those specifications I have put in. I leave Node A open and adjust R4 to make Vc=0V. When I measure Vc originally it is about 10VDC(on the DVM). If I use a 100M resistor it only...

Hello experts! Here is 3-bit digital to analogue converter. I have a question related to this. 1)What does it mean if you have to say to perform operation on it with 101? 2)And we can obviously conclude and see output voltage on oscilloscope. But by calculation how can you predict...

Here is the Problem. http://img577.imageshack.us/img577/3769/screenshot20110803at231.png Uploaded with ImageShack.us I know the first part where the signal goes from A to B and i know what the signal will look like at B, as i used the inverting op amp formula. Vo=Vin x -Rf/R1 I understand...

So I have a load cell that outputs a + and - signal in the range of 0 to 30 mV depending on the force applied. I fed the +signal through a non-inverting amplifier that bumps up its value to about 4 V. However, when I applied force onto the load cell, the voltage range did not get amplified. The...

Im doing my thesis its about measure haze at ambient, so I found very little information about DIY schematics to work with photodiodes, at last my tutor found something, but when I was doing the circuit I found that this doesn't worked! well I made some mods and for a mistake I found a...

Hello All, Today, I was experimenting with a basic op-amp integrator circuit (I have a piezo element that I ripped from a buzzer, which I would like to use as a mechanical pressure sensor). So I'm using an integrator circuit to integrate the voltage signal produced by the piezo to get a...

I just started learning about Op-Amps. Working through basic equations seems straightforward, however I was curious about the function of the feedback resistor. As the name implies, one might infer the current/voltage potential "feeds back" from the output back into the input (I know there are...

I'll try to make my description quick so you don't tldr me. So I worked on this project in school on a 6.5inch woofer. I took it from an old computer set (creative) and the amp was dead. I designed and built a new dual supply class ab stage amplifier with a low pass filter. So now I don't...

I am trying to setup a circuit with an op-amp that is referenced to high rather than ground and has a positive gain less than one. So for instance, my circuite has power rails at ground and 3.3v. I want an input of 3.3v to give an output of 3.3v and i want an input of 0 to give an output of...