What is Inverting op amp: Definition and 15 Discussions
This article illustrates some typical operational amplifier applications. A non-ideal operational amplifier's equivalent circuit has a finite input impedance, a non-zero output impedance, and a finite gain. A real op-amp has a number of non-ideal features as shown in the diagram, but here a simplified schematic notation is used, many details such as device selection and power supply connections are not shown. Operational amplifiers are optimised for use with negative feedback, and this article discusses only negative-feedback applications. When positive feedback is required, a comparator is usually more appropriate. See Comparator applications for further information.
Using analog discovery 2 kit and the bode plot produced by the network analyzer is off. The scope looks fine and everything is behaving how it should except for the bode plot. The magnitude of the bode plot will start at the correct dB then right before tapering off it shoots up a few dB and...
This is regarding the positive feedback of an Op-Amp and the inverting Schmitt trigger. This is a typical inverting Schmitt trigger -
I need to design the Schmitt trigger such that I have a threshold voltage of around 2V, when my ##+-V_{CC} = 8V##. The slew rate of the Op-Amp allows for a...
This is the circuit in question.
During lecture, when checking whether this was negative feedback, my instructor said that if the v_out increases, then v- increases as well, which would lead to the next v_out decreasing because v_out = A(v+ - v-). I get how if v- increases the next v_out would...
Greetings,
I'd like to invert a signal I get from a photodetector (the signals are up to 100 mV). I decided to use an inverting op amp circuit for that, however, when looking online through the op amp catalogs - the minimum input voltage in the descriptions is a few volts while my input would...
Currently working through a chapter on op amp circuits, fundamentals.
Came upon this practice problem in the section on inverting op amps
imgur link: http://i.imgur.com/2DrQLXk.png
imgur link: http://i.imgur.com/7KRKzKC.png
A working of this problem is not given. I got the correct answer...
Homework Statement
Hello,
I just came across a design problem based on an inverting op amp.
The requirement output values are -25G and not greater than 1kOhm output impedance.
With inputs 1V p-t-p and 75Ohms input impedance
Choosing values for the gain seem fairly easy, but how these values...
Homework Statement
Write output voltage in terms of input voltages for the circuit drawn.
I drew the circuit and then feed back loop.
Homework Equations
Ohms Law V=IR
Basic Properties of Op Amps (ideal), voltages are assumed equal at both inputs...
The Attempt at a Solution
The...
Homework Statement
Find Vo/Vin.I understand perfectly how to do this question. It simply involves an application of ohm's law to find i1, then KVL around the first loop. KCL at the top, and KVL around the second loop. Then to solve simultaneously.
My issue however Is why the mechanics of...
Hi guys :smile: This question has been bugging me for a REALLY long time so thanks in advance for the help :biggrin:!
Homework Statement
Calculate the Hybrid Parameters for an inverting op amp shown below:
https://www.dropbox.com/s/45mjldud2ar5pwg/invOpAmp.jpg
And I need to get it...
Homework Statement
http://www.freeimagehosting.net/jqqoz
Homework Equations
V(output) = V(input)(R2/R1)
The Attempt at a Solution
The equation above is valid if the back part of the upper circuit (involving R3,R4 and the Earth wire) does not exist. I tried to improvise with it by...
1) What is a typical voltage level coming from an 8Ω speaker being used as a microphone to record a human voice at average volume? I kept forgetting to bring it to school to measure it's output with the oscilloscope, so I'm wondering if anyone here knows it.
2) I seem to remember reading...
Homework Statement
1. Using the LM324 op amp build an inverting amplifier with a gain of 50.
Measure the cut-off frequency
2. Plot your results on a graph as a function of log(frequency). Comment on the
results
I have done this in a lab and then graphed it, it seems to be around...
Hello Physics Forums community, I'm a new member and this is my first post.
I have a circuits exam tomorrow, and though I grasp the majority of the material I'm having a hard time understanding the solution to a HW problem that I attached as a picture.
Problem: Show that the circuit has...
For an inverting op amp with the positive input grounded, the equation for V(out) is (Vin)*Rf/Rin. Thats fine
But what if the positive input is not grounded? What if there is a voltage applied to that input as well? How would I find V(out) when the positive input voltage is larger than the...
please look at this circuit
http://hyperphysics.phy-astr.gsu.edu/Hbase/Electronic/ietron/inva2.gif
The transfer function for the the circuit above is
Vout = (-Rf/Rs)*Vs
if I were to switch the terminal of the op amp so that Vin is inputted into Vp and Vn =0 instead (everything is the same...