All Questions
Tagged with differential operational-amplifier
174
questions
0
votes
2
answers
100
views
Differential line driver built with discrete components
I need to establish an SPI communication over one meter in a very noisy environment. To do this, I am planning on using differential communication over a twisted pair cable.
I would use a dedicated IC ...
5
votes
4
answers
474
views
Ground in differential opamp situation
I have a setup like such in the provided schematic.
The idea is that I do have a -2.5 to 2.5V signal which I'd like to convert to a signal between 0 and 5V.
How should I connect my opamp? Should the ...
- 376
2
votes
1
answer
173
views
Simple example of first order ODE and Operational Amplifier
Hayt's (8th edition) Engineering Curcuit Analysis (Chapter 9, p360) contains an illustration of Operational Amplifier solving \$\frac{d^2v}{dt^2} = -9v\$. It is hard for me to understand how it was ...
- 345
2
votes
1
answer
356
views
Using Operation-Amplifier circuit to apply differential equation
$$ 6b(t)+\frac{8d}{dt}b(t)+\frac{10d^2}{dt^2}b(t)+\frac{4d^3}{dt^3}b(t)=12a(t) $$
I would like to implement this linear equation by using any type of op-amps. The solution will be the function b(t), ...
- 25
2
votes
1
answer
85
views
Designing a single-ended to differential driver to DC2588A-A evaluation board
I'd like to test the DC2588A-A, and I noticed that the user guide mentions it's driven by a pair of ADA4899-1 DRIVER amplifiers. However, the user guide doesn't provide clear information about the ...
1
vote
3
answers
97
views
'Best' topology to measure this weird sensor standard
I am developing an embedded solution to measure and record the analog signal from a PCB Piezotronics pressure sensor. Specifically the Model 124A21.
The sensor has some integrated circuitry to boost ...
- 11
0
votes
3
answers
292
views
Differential op amp feedback resistors
I understand if you do not have negative feedback in any op amp configuration then the output will be unstable (will oscillate for example) and the feedback resistor and input resistor on the negative ...
- 412
0
votes
1
answer
640
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Using a differential op amp to convert a differential pair into a single ended signal
I need to convert a differential pair into a single ended signal and would like to use a differential amplifier to do this.
Using the above circuit and the ADA4850 I was hoping to achieve this but of ...
- 412
0
votes
0
answers
182
views
Converting Balanced Audio to Unbalanced Audio without Damaging Sink
I want to receive a stereo balanced audio signal and feed it into the stereo microphone inputs via my motherboard's header pins.
I added about a 30 dB reduction in gain which looks good on the scope ...
- 463
1
vote
1
answer
368
views
How to buffer (high input impedance required) a differential signal
I'm wanting a to increase the input impedance to a differential ADC. The ADC spec states that it can't handle a negative voltage lower than -100mV the ADC's supply can handle ~5V (this is a ATtiny1617)...
- 127
2
votes
1
answer
83
views
Understanding opamp circuit, 13 MHz (interference?) amplification
I have the circuit drawn below soldered to a prototyping board.
First, I added a high-pass filter a with cutoff-frequency of 600 kHz, since I would like to receive around 2 MHz.
Then the received ...
- 376
3
votes
3
answers
479
views
Op-amp - minimal differential voltage?
I want to implement a PT100 sensor measuring circuit using a Wheatstone bridge. Below is a link to the implementation that I suggested.
https://www.instructables.com/Measuring-Temperature-Using-a-...
- 61
5
votes
2
answers
1k
views
Instability of fully differential op-amp in LTspice
I tested the following circuit including a fully differential op-amp for stability in LTspice. The circuit has an inverting gain of 6 and a roll-off at 4 MHz. When exciting the circuit with a step, ...
- 109
1
vote
2
answers
905
views
Benefit of fully differential amplifier
I am trying to build an audio amplifier PCB with S/PDIF and single ended line level inputs and want to use the CS42528 CODEC (datasheet).
My questions are regarding the input and output stages of this ...
- 57
1
vote
2
answers
97
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What happens if you go below the minimum common mode voltage of a current sense amplifier?
This might be a simple one, but I can only seem to find information on going above the common mode voltage (VCM), not below it. Obviously going above the VCM upper limit will damage the device.
I'm ...
- 19