All Questions
Tagged with analysis operational-amplifier
15 questions
2
votes
2
answers
208
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Help to determinate stability of Opamp Circuit
I have background in software but this time I need to build a circuit for scaling a signal from 15 to -15 VDC. At college I took some subjects on Electrical topics so I have read to remember, after ...
- 1,144
2
votes
1
answer
413
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How to verify noise modelling in fully differential op-amp Spice models?
Texas Instruments explains in one of their videos how to verify the noise model of op-amps in Tina-TI. T
For this, the op-amp is wired in a buffer configuration. A voltmeter (voltage pin) is placed at ...
- 21.8k
4
votes
0
answers
157
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Nodal Analysis of an Inverting Operational Amplifier
I am trying to derive the closed-loop gain of a basic Inverting Op-Amp circuit using nodal analysis and the model that includes its non-ideal parameters. The equation I derived is incorrect, and it's ...
- 91
0
votes
3
answers
2k
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Analysis of Preamp circuit
I found this schematic (in Spanish) and annotated it with my interpretation. Anyone care to correct me or add?
- 4,436
2
votes
2
answers
97
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Op-Amp analysis without using op-amp gain
I have a question concerning this op-amp problem for which I need to find an expression for \$v_{out}(t)\$, where \$V_B\$ has a constant value:
simulate this circuit – Schematic created using ...
- 177
0
votes
2
answers
501
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Op Amp Summing Point Problem (Ideal)
I have a quick question on this example problem on (ideal) OpAmp analysis. I understand the basic cases of negative and positive feedback, and how there is a virtual short between the input pins of ...
- 78.7k
1
vote
2
answers
146
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Help with analysing OP AMP circuit
This op amp circuit is used to offset stepped-down AC voltage by 2.5V(approx), so that the RMS of the voltage can be calculated. I can not change the configuration of the circuit, so that is ruled out....
- 36
3
votes
2
answers
584
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What is this Op-Amp Configuration doing?
This Op-Amp Arrangement is part of an analog signal processing for a knock sensor of a combustion engine and I'm very curious about what this part actually does, as my google research didn't help me ...
- 473k
0
votes
2
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433
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Current Generalized Immittance Converter (CGIC) Nodal Analysis
Below shows the current generalized immittance converter. I am trying to derive the transfer function (V3/Vin) of the said filter but I am getting problems in obtaining the voltages at some of the ...
- 28k
0
votes
1
answer
108
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Pulse-excited integrator reaching infinite potential?
I was given the following Op-Amp circuit to analyse and to find the potential V_out as a function of time, with V_in defined as the Heaviside step function:
$$V_{\text{in}}=\begin{cases}0\mathrm{V} &...
- 8,709
1
vote
0
answers
968
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How to calculate resistor values for CFO differential amplifier Op-Amps?
I know that resistor calculations for current feedback amplifiers is different from their voltage feedback counterparts ( especially in higher frequencies as they have small impedance in inverting ...
- 1,591
2
votes
2
answers
522
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Nodal Analysis algebra simplification
I am doing part a in this homework:
Doing nodal analysis of two op amps and came to these two equations:
$$\frac{V_1-V_{ref}}{R_2} + \frac{V_1-V_{x}}{R_1} + \frac{V_1-V_{2}}{R_f} = 0 $$
$$ \frac{V_2-...
CommunityBot
- 1
1
vote
1
answer
255
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Multi Op Amp Analysis
I am asked this for homework:
I am trying to do nodal analysis for part A of the question but am running into problems with number of unknowns versus number equations. Assuming I chose my nodes ...
- 26.8k
0
votes
1
answer
2k
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Two Port parameters on an Op Amp
I am asked to find the h-harameters for this op amp:
I found the gain to be 1.87*Vi (where Vi = the input source). However I don't know how to do two port parameters with op amps, we've only covered ...
- 315k
1
vote
2
answers
300
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Systematic construction of the ODE system of a circuit containing opamps
I want to compute the voltages and currents in a circuit containing R,L,C, opamps and voltage sources. I perfectly understand how to do this for circuits containing only R,L,C and voltage sources, ...
- 134k