# Questions tagged [voltage-clipping]

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### Diode clipping question on output of opamp

I have been trying to implement a basic hard-clipping circuit for a distortion guitar pedal, based on two simple diodes, but somehow I can't get it to work as it is supposed to be. The basic design is ...
61 views

### Calculate resistor value in Zener clipper circuit

I'm trying to build a circuit which drives one of two LEDs from a variable voltage power supply, which can range between -15 to +15 volts. I'd like the LED to hit maximum brightness as early as ...
• 103
69 views

### What happens if the DC voltage of a positive clipping circuit is put to a negative value?

While working with this circuit I observed something which is completely new for me. The output of this circuit is It is showing that current is flowing through both the diodes. But how come is that ...
• 177
126 views

### Oscilloscope showed weird readings of a clipping circuit

Circuit diagram (Vs is 10 Vpp sin wave at 1 kHz, and the oscilloscope was measuring Vo): constructed circuit: Here is the readings I got (noted that it was using AC coupling by accident): The ...
1 vote
135 views

### Oscilloscope input clippers

The analog front end of an oscilloscope begins with an attenuation stage. Mostly they use two attenuation stages, like 1/1 and 1/50. From: Rigol Homebrew Wiki - schematics page The image above ...
1 vote
73 views

### High power dc/dc converter (or voltage clamping) with high source impedance

Short version: I have a DC voltage source (adjustable up to 750 V 60 A) that is powering our robot which expects 320 V nominal (never exceed at 360 V) and can consume up to 30-35 A (but only 30 mA ...
• 7,367
127 views

### Oscilloscope bizarrely results in clipping at some voltage resolution settings

I have a Keysight InfiniiVision DSOX3024T. There is a complicated signal fed to it coming from an AriCorp TDC-30 transimpedance amplifier, with typical signal in the hundreds of mV. The signal is an ...
• 131
366 views

### What went wrong with this class A amplifier design?

I was trying to build a normal class A amplifier, but no matter how hard I try, I cannot find the reason behind my output (blue line) being clipped at the negative cycle of the input (yellow line.) ...
139 views

### Why am I getting clipping at the inputs and outputs?

I have designed the below circuit in LTspice. This is used to measure the voltage drop across the shunt. I know people on this platform have said I should use a current transformer, but they are not ...
• 2,361
94 views

### Double Valued Voltage in Rectifier with Capacitor Filter

When a capacitor is charged in a full wave rectifier, as shown below, the load voltage closely follows the AC input voltage, less some 0.7V. When the input voltage falls from its peak, the voltage ...
1k views

### 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 ...
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1 vote
899 views

### How do we calculate output voltage in clipper circuits?

In the below circuit, when the diode is forward biased, the current is passing through it and not from load resistor (R_L), but the voltage across both of them (diode and R_L) is same as they are in ...
68 views

### Differences between two positive clipping circuit

I have been looking into positive clipping circuits using an op amp and found two circuits recommended here and various pages online like Microchip tips and tricks page 16 and nprcet.org page 22. ...
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9k views

### 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?
350 views

### Half-wave rectifier with filter and clipped input signal in oscilloscope

When building a half-wave rectifier with a capacitor filter for my electronics lab, there was significant clipping at the peaks of the input signal. When looking at the .csv file pulled from the ...
• 115
318 views

### Determining noise performance of clipper circuit

In some audio circuits (e.g. instrument amplifiers and guitar effects), I've seen something similar to the following op-amp circuit with back-to-back VBE multipliers in the feedback loop to provide ...
• 2,181
2k views

### 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 ...
390 views

### How to arrange input protection components?

I want to protect the input of my 5V micro-controller from two types of disasters, I am detecting a low on the input (0V): The input is from a switch. When the switch is on it provides a ground. Over-...
• 2,361
662 views

### Class AB power amplifier output clipping when input exceeds 1.7V

I have a 3 transistor Class AB power amplifier that I referenced from a working design which has different design parameters and biasing than what I need. How I intend on using it, it will be used to ...
335 views

### Preamp stage for audio amplifier using LM741CN clipping too early [duplicate]

I'm trying to build the preamp stage for an audio amplifier circuit using the LM741CN. I'm using a variable resistor for Rf so that I can vary the gain. What I'm finding is that when I have Rf set to ...
174 views

### Why is my clipping circuit involving 1N5819 Schottky diodes in my radar receiver not working?

I have built the circuit shown below and been testing it on a breadboard. Everything works except the positive half clipping circuitry. I need it to clip after 3.3V. It currently just clips below 0V, ...
193 views

### clamping the amplitude of a wave to certain level

I'm trying to prevent a wave form from exceeding 10V.p.p. I tried various things, but ... what the correct way to do it? this clamps a 11V signal to +/- 900 mV ... and converts a triangle to square. ...
• 325
188 views

### 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 ...
641 views

### 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 ...
482 views

### Clipping when using a CD4051 analog multiplexer

Regarding the CD4051 analog multiplexer, Data Sheet If I connect VDD to +5 V and VSS, VEE to GND. The analog signals are coming from modules with the analog signal having a DC offset that can be as ...
• 333
94 views

### Clarification on a clipper circuit

I'm reading a paper whose result I am trying to replicate. One of the circuit elements is a clipper circuit as shown below. This is a very straight-forward circuit. The positive value is limited to \\$...
191 views

### Why isn't there any clipping in this diode circuit?

This is the circuit. This the input and output graph:
459 views

### Properties of Waveform Clipping

I just completed (and submitted) a recent lab report in an electronics class on op-amp circuits. The only implementations of the op-amps so far are in the inverted and non-inverted form. While ...
1k views

### Why do I have clipping in this emitter follower

I am trying to design a class A amplifier buffer stage (I know it is not efficient.) I am starting from the simple emitter follower and the next step is to replace the RE resistor with a current ...
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1 vote
2k views

### Diode alternatives for LTspice

I am using LTspice as opposed to P-spice because I have a Mac. I've been asked to simulate a circuit using 1N914 and 1N4729 diodes, but LTspice doesn't have those diodes. What are equivalent diodes to ...
33 views

### Design a circuit in Ltspice based on the input and output

I need to design a circuit that takes a sinusoidal input with peak of 8V and generate an output such that the positive peaks remain the same and the negative peaks get inverted and have a peak of 4V.
1 vote
147 views

### Output Stage Clipping

I'm playing around with the circuit below (it's a very slimmed down version of Figure 11.10 from High Power Audio Amplifier Construction Manual pg 348) Can anyone explain what it is in the circuit ...
• 307
3k views

### BJT Common Emitter Clipping

Following on from my last question Cascaded BJT Amplifier Load - I'm trying to understand what it is (via math or otherwise) that causes the input signal to appear malformed when the output of the ...
• 307
1k views

### Voltage multiplier does not work

I have a built a simple voltage doubler. the circuit is as below: simulate this circuit – Schematic created using CircuitLab This represents only one stage, and my circuit has 4 stages. The ...
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183 views

### Signal clipping in cascade transistor amplifiers

The two-layer voltage amplifier circuit can transfer a signal of up to Vi = 50 mV to the output without clipping.and 1st stages gain Av1=-6.41 . +15 volt is ...
• 719
126 views

### clipper question with non-ideal diodes

Vo for the clipper circuit where Vi = 10sin (6280t) and diodes are 0.6 volts. I think the simple form of the circuit is like this. if we don't calculate the resistors. Could the output signal be ...
• 21
111 views

### High voltage high frequency clipper

I want to measure the frequency of a signal around 200khz (max) and the voltage may vary from 10v to 200v peak-peak. I will have only a constant voltage at the time of measurement. Not varying. So ...
1 vote
462 views

### Input Voltage vs Output Voltage for a Shunt Positive Clipper with Bias Voltage

Assume voltage drop across diode is 0.7V in this case. From what I understand When V(input) is positive, but less than 0.7+V OR When V(input) is negative AKA When the diode is acting as open circuit:...
233 views

### Transfer characteristics of circuits involving op amp with diodes

How should I approach such questions?
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278 views

### Turning on an automotive relay when enough voltage is available

I'm trying to drive a relay off a dome light in a car, where the dome light fades in smoothly. That is, say, I have a constant ground and the other wire goes from 0 to 12V (up to 14V) over a couple ...
• 131
540 views

### Active clipper terrible performance

I need a clipper for a 10 kHz signal to protect an ADC from possible overvoltage. I'm using the usual active circuit (simulation is in multisim): Unfortunately the result is very bad, the opamp is ...
• 107
386 views

### Need op-amp "window clipper", clipping below and above some range of DC

I need to design a kind of window clipper. It should work like this: Conditions: Vin: 0-6 V, Vout: 0 V Vin: 6-8 V, Vout: 0-3 V Vin: 8-10 V, Vout: 3 V There are some example values, I need to be ...
1k views

### Why does the positive wave of my class AB amplifier output get clipped far below rail voltage?

For the past 6 months I've been designing and building a 30W 3MHz audio modulated Tesla Coil driver. For this, I've created a +-15V linear regulated power supply, an AM modulator using an MPY634, and ...
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147 views

### Need help with theremin oscillator

I'm having trouble getting my colpitt's oscillator to give me nice sinusoids. It seems to be clipping the output for for reasons I don't understand. The circuits needs to oscillate at 7MHz (Body ...
397 views

### 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: ...
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123 views

### How can I change transfer function slope after a certain point?

I need to design a circuit for the following transfer function. I've tried using biased parallel clippers, but the only thing I've managed to do is clipping the output at 5V i.e the slope becomes ...
• 1
353 views

### Sine wave clipping before rectifier when wire resistance is added at secondary of transformer in LTSpice

I'm simulating 4 different circuits, they are all power supplies, with loads, filter capacitors, rectifiers made by four 1N4007s, and transformers fed from 120VAC: They all have the same problem, ...
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311 views

### Max Input Voltage for a BJT amplifier

I have built a BJT amplifier and I have a function generator connected to the input of my circuit. I have also connected both channels of an oscilloscope to the input and output of my circuit. I need ...