All Questions
Tagged with negative-feedback operational-amplifier
10 questions with no upvoted or accepted answers
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Op-amp 'overcompensation'
First, a bit of background; I'm trying to regulate a HV DC-DC converter using an op-amp with an NPN Darlington current booster. The DC-DC converter is a push-pull circuit driven at about 40 kHz that ...
user194170
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250
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How is this series series feedback topology forOPAMP?
This is stated as series series type of negative feedback but why.
Whereas this one is series shunt topology
- 475
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voltage follower design question
Hi , I am trying to build a simple voltage follower circuit in IC. I have tried to build ideal Op-Amp as a transconductor. Now, it requires minimum bias voltage for it to operate as a transcondcutor (...
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Problem with Arduino MEGA and opamp LM741CN for feedback ammeter
I am trying to create a feedback ammeter using Arduino MEGA ADC and OpAmp LM741CN. In order to perform a proof of concept, I use Arduino MEGA, LED, and Resistor 1 MΩ, then I read its current with a ...
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Discussion on demonstrating saturation in operational amplifiers with positive feedback, and simulation problems
I have been dedicating my time to the study of Operational Amplifiers for the past few weeks.
I understood that an amplifier in an open loop configuration has a very high gain, in the case \$A \to \...
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What is the purpose of a negative feedback resistor in a schmitt trigger?
This schmitt trigger is used with an integrator to create a triangle/square wave oscillator but R5 has been added to the typical inverting schmitt trigger topology. I know that in simulation, this ...
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Op-Amp Summing Amplifier Not Working
I have this below circuit op-amp summing amplifier with its below result:
But in my actual circuit all components are the same except the op-amp.
I am using this op-amp part in my practical circuit :
...
user220456
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505
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Effect of a heavy load on op amp output
Simulated on Multisim 14.0
In the above circuit, without RL the circuit behaves quite normally with a non inverting gain of 50 for any input at V1 till the output saturates to 15V.
Things however ...
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How to solve practical OPAMP with finite differential resistance and finite offset current while other parameters can be considered ideal?
simulate this circuit – Schematic created using CircuitLab
Ip(bias)=200nA
rd=differential resistance=5Mohm
a=infinite
What should be its output?
I am confused if I should consider negative ...
- 93
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1
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299
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Question about the slew rate
Let's consider an op-amp:
From basic courses of electronics, we know that the output voltage as a function of the differential input is given by the following picture:
Now, assuming that:
the op-...
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