Questions tagged [voltage-clipping]
103 questions
20
votes
2 answers
How would I design a protection clipper circuit for ADC input?
I'd like to be able to protect my ADC from input voltages higher than 5V. What's the simplest protection circuit I could build to have an output like shown below?
waspinator
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8
votes
5 answers
How to prevent op amp from saturating?
How can an op amp be prevented from going into saturation if the feedback is intermittently disconnected?
For example, in this circuit (simplified case of a real-life problem), the op amp acts as a current source to a load, but the load may be…
Alex I
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6
votes
4 answers
Best way to clip a circuit
I have an analog circuit that takes a ±15 V DC voltage and some input signals, does some things to the signals and outs an analog signal via an op-amp. I would like to limit the output voltage to ±10 V to protect circuitry down stream. I am…
njs
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5
votes
1 answer
Need help designing and implementing an op-amp based distortion circuit
I've been attempting to design a distortion pedal for use with my bass guitar and amplifier. The simulations in LTspice were promising, I moved to implement it and, in short, it did not work.
Note: The amplifier used in the circuit is merely…
Alex
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5
votes
3 answers
Clip signal with very low threshold
I need to limit a signal to the following range: [-0.25V, 0.25V]. This signal is comming from a shunt resistor in series with a load with variable impedance on a 220V power grid.
The project contemplates loads up to 1A peak, but I can't guarantee…
borges
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5
votes
2 answers
Operational amplifier output is asymmetrically clipped
Why would an amplifier output be clipped asymmetrically?
I am building a small headphone amplifier using the Texas Instruments TPA6100A2. I have built up the circuit just as in the TPA61002 Evaluation Board User's Guide:
The opamp is designed for…
codeZonkey
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5
votes
2 answers
Reduced output of op amp peak detection and hold circuit
I have used op amp peak detector & hold circuit for finding the peak of voltage obtained from scintillation detector and pre-amplifier.
I observed that the observed peak and hold output was 700 mV, instead of the expected 1.5V and that when the…
Vishal Desai
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4
votes
2 answers
TDA7231A seems to be clipping all the time
Final update:
I got two more chips today and started experimenting with them. I tried both adding a 10 k resistor from C4 to the ground and the circuit in JIm Dearden's answer. His circuit helped a lot in noise reduction, but there was still…
AndrejaKo
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4
votes
3 answers
Reduce and clip voltage of a 5Mhz ultrasonic signal from +-50V to 0-3.3 V
I know there are a lot of posts similar to this one but some differences make it worth posting it.
I’m working on a project where I have a 5MHz AC signal with the largest amplitude of +-50V. It’s an ultrasonic signal where the transmitted signal…
user18538
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4
votes
1 answer
Replace transistor used as diode
in the schematic on page 5 of this document:
The note says:
T2a is connected as a diode (clipping diode) to protect the power
source against higher Vcc voltages.
I assume from this I can replace T2A with a simple diode, with one side connected…
X Codz
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4
votes
2 answers
How do I use a clipping Zener at the input of an Opamp inverting amplifier?
I have a \$ V_{in} \$ signal for which I cannot guaranty that it would have an upper limit. I want to clip this input signal to a limit (e.g.; 8.2V) with a circuit like above.
Is this circuit alright? Are there better Opamp circuit for this…
hkBattousai
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3
votes
2 answers
How to replace diodes with MOSFETs?
The circuit shown below allows clips the output to +1 and -1. How can I replace the diodes with MOSFETs that have a similar behavior?
Leonhard Euler
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3
votes
2 answers
Why does differential op-amp require mid-point biasing at its input to prevent clipping?
There's an AC signal, 1 V amplitude, which is the input to an op-amp, in differential mode:
However, the output gets clipped and the amplitude isn't unity for some reason, even though gain is set to be 1.
To "fix" this clipping, one needs to…
user234571
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3
votes
1 answer
How can I clip voltage faster?
I have this test circuit, which has this signal:
V1 may change from 1 to 30 V, V2 may change from 0 to 4 V peak to peak.
I need to clip the signal at about 3 - 4 V to feed it to an Op Amp, which has a split supply voltage of about -5 and +5 V.
So I…
Thomas Anderson
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3
votes
1 answer
Zener diode, clipper circuit
This is the original assignment. My solution attempt is below that.
Explain the output expected from the following circuit and also identify the name of circuit.
(Where VZ is Zener voltages for ZD1 and ZD2 and V1= Vp/4, VZ = Vp/2)
I did try to…
Swaroop Ch
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