Questions tagged [sine]

For questions about sine waves as used in electronics (e.g. AC waveforms, oscillator outputs, signal generator outputs, etc.). Consider using in conjunction with tags such as "ac", "oscillator", "math", etc., if applicable.

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BJT as current buffer for op amp

I am working on creating a 10-20KHz 0-5V sine wave feeding a coil which would be around 450uH. At this stage I am stuck in that I can produce the sine wave using an STM32 or a DDS IC but that will not ...
Mir Hamza's user avatar
1 vote
3 answers
121 views

Sine wave CMOS buffer from inverters with or without feedback

Is it possible to buffer a sine wave using inverters alone or with some kind of feedback? I've been browsing google for minimalistic (I'm in 3.3-12 V domain) sine wave buffers and this thought stuck ...
San's user avatar
  • 85
0 votes
1 answer
81 views

High voltage pad buffer design with 2nF load and ringing on first stage output

I am trying to design a high voltage (12V) buffer that will drive a sine wave with rail-to-rail peak-to-peak amplitude and a big capacitive load, maybe 3nF. Browsing I came upon this Master's project: ...
San's user avatar
  • 85
0 votes
1 answer
49 views

Input stage for sampling audio sine wave with ADC

I'm building a prototype, checking the potential for a project. I want to be able to sample a sine wave from a power amplifier using a Teensy4 ADC. I have a Teensy 4.0 powering an Evisun isolated DC-...
David R's user avatar
2 votes
2 answers
137 views

Simulating square to sine wave conversion via LC circuit results in 200-fold amplification

After watching this video I decided to simulate the following circuit in PSpice: Time domain simulation with general settings, TSTOP of 100 ms and maximum step size of 1 μs yielded the following sine ...
beardeadclown's user avatar
2 votes
1 answer
157 views

What is the output voltage of 1 Vp-p specified sin/cos encoders?

Encoders with sin/cos analog output (example model Hengstler S21) typically specify the output signal as 1 Vpp. This seems to be some kind of de-facto standard for the output amplitude. If I ...
jpa's user avatar
  • 8,378
0 votes
1 answer
88 views

When can we apply phasor analysis to an \$RLC\$ circuit?

This answer of mine shows that not every \$RLC\$ circuit reaches sinusoidal steady state at input frequency. A well-known theorem states that: If all natural frequencies of a uniquely solvable LTI ...
Sgg8's user avatar
  • 163
1 vote
1 answer
81 views

Op-amp not increasing amplitude of signal

I was doing some LTSpice simulation with an op-amp to amplify a 1 millivolt 40 kHz sine wave. However, in the output signal, it had just raised the voltage of the whole waveform, it decreased the ...
epicMan123's user avatar
0 votes
2 answers
128 views

XR2206 Signal Generator breaks up and distorts badly all waveforms

I just put together this signal generator with a xr2206 DIY kit, single supply, tried 9,6V smps first (too low!), then w/ checked speced minimum 12V DC Li-Ion Vcc, same behaviour, distortion/unstable. ...
rantoniusw's user avatar
3 votes
1 answer
104 views

Strange low frequency sawtooth in a 110 kHz Hartley oscillator

I am trying to build a Hartley oscillator for 110 kHz using a BJT according to the following schematic: I am assuming \$ \beta=100\$ and \$ V_t=25mV \$ The collector current is about 1.63 mA, Vc is ...
amogh waghmare's user avatar
1 vote
2 answers
83 views

High pass filter doesn't get back original signal?

If you simulate this (from https://www.circuitlab.com/editor/#?id=3p73kzybb5r8): simulate this circuit – Schematic created using CircuitLab You see this: The input is a combination of the ...
roaibrain's user avatar
  • 209
-1 votes
3 answers
202 views

Why does my spectrum have humps?

In a fun experiment I used an Applicos ATX7006A 18 bit AWG to generate a 1 kHz sine wave and used an Analog Devices AD7671 16 bit ADC to digitize the waveform, then coherently captured the digital ...
Dan Bullard's user avatar
0 votes
3 answers
177 views

How can I find the time period for two sine waves using the oscilloscope in Multisim?

The formula for calculating the phase difference requires a time delay and a time period which is given in the formula: Φ = td/tp × 360 Where ...
Tab-U-4's user avatar
12 votes
3 answers
2k views

What causes the trough of a sine wave to become sharp?

I am using a white LED to send a 5 V p-p: +2.5 V to +7.5 V, DC offset of 5 V, sine wave of frequency 1 kHz as shown in the transmitter circuit. The current generated by the photodiode is converted to ...
rockky007's user avatar
  • 161
3 votes
1 answer
122 views

Impedance matching a function generator and a laser source

I am using a function generator to generate a sine input to a modulated laser. The function generator has output settings of 50 Ω and High-Z, while the laser for some reason has a 1 kΩ input impedance....
Bernhard's user avatar
  • 115
2 votes
1 answer
137 views

Is it possible to connect an antenna of the proper length to a CPU and radiate its 4 GHz oscillating current?

Since a 4 GHz CPU has been made to provide that super high frequency, is it possible to connect an antenna of the right length to it and radiate its 4 GHz oscillating current?
ghd's user avatar
  • 21
0 votes
2 answers
238 views

Class-D audio amplifier produces a sawtooth wave on the output, not sine

I am using a MAX9744 Class-D amplifier and want to get a sine wave in the output. Someone suggests using an LC low-pass filter for this, and in the datasheet of the amplifier, the values for inductors ...
mangozu's user avatar
0 votes
2 answers
90 views

LTspice problem with small amplitute sine wave

I simply wanted to generate a low amplitude sine wave, but the weird waveform happened. Why is the plot not showing the sine wave?
Willis Lin's user avatar
4 votes
2 answers
264 views

Alternate between 0 and 180° shift at regular intervals for a sine source during a .tran operation on LTspice

Is it possible to alternate between a 0 and 180° shift at regular intervals (say every second) for a sine source in a circuit during a .tran operation in LTspice? (I need to see the reaction of my ...
c.leblanc's user avatar
  • 339
1 vote
1 answer
74 views

Distortion from bridge driver

I am feeding a square wave signal into some NAND gates and then into an ICL7667 MOSFET driver, which in turn drives an LC circuit. The enable is shown for reference, but if always on. Trace 1 (yellow) ...
Vernon's user avatar
  • 33
1 vote
1 answer
368 views

Generate a sine wave with MCU

I want to generate a sine wave without an offset voltage. I generated a sine wave from 0 to 3.3 V and it has a 1.65 V offset. I need a sine wave from -1.65 V to 1.65 V using an MCU. How can I do that?
Ali Buğra ÇETİN's user avatar
3 votes
6 answers
768 views

Why does this inverter use two bridges?

I recently destroyed a 1000 W-rated 24 VDC -> 220 VAC pure sine wave inverter I bought a while back from Ebay, by connecting its output to mains power inadvertently. Afterwards, I decided to ...
John Doe's user avatar
5 votes
1 answer
529 views

Why is an inductor kickback wave-like?

I though that an inductor, when it doesn't have current flowing through it anymore, would quickly discharge in the opposite polarity. More precisely, I was expecting one quick peak in a negative ...
Charles-Ugo Brouillard's user avatar
0 votes
2 answers
316 views

Why doesn't the voltage at the resonance frequency go above the input frequency of a sine wave source?

I have performed a simple RLC parallel circuit experiment to determine the resonance frequency. I used the voltage as the magnitude. Experimentally, the magnitude at the resonance frequency tops at ...
Teodoras Paura's user avatar
4 votes
4 answers
406 views

AGC for integrator circuit

I am trying to generate a sinusoidal wave whose frequency I can control based on the input being a triangular wave. I am getting the sinusoidal waveform by integrating the triangular wave through an ...
ijustwannalearnrobot's user avatar
0 votes
1 answer
88 views

Phase to phase voltage noise in a BLDC sine wave controller

I am trying to program a BLDC controller using SVPWM. The waveform attained from phase is almost what I excepted. I also cross verified with another BLDC controller which is available in market. The ...
Surendran 's user avatar
0 votes
1 answer
120 views

Output voltage halved in 3-phase SPWM inverter simulation

I am just trying to simulate a 3-phase inverter connected to a star-connected load controlled through sine PWM modulation. In real life, I would expect a carrier that would go from zero to one. As ...
your_best_friend's user avatar
2 votes
1 answer
139 views

How to design a function generator (Arduino Nano) to filter out noise of different signals?

I have an Arduino Nano-based function (sine, sawtooth, triangular, square) generator. Basically it is an Arduino Nano connected to a MCP4802 DAC, whose output is connected to an RC lowpass filter. ...
ojacomarket's user avatar
1 vote
1 answer
81 views

What am I doing wrong with this tuned oscillator?

How I can start it? I need a 27 kHz sine wave, but I can't run it.
Miklush's user avatar
  • 13
0 votes
2 answers
115 views

Is it possible to change the waveform of AC from sin(x) to |sin(x)|?

The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with the positive direction of the current and vice versa. So, is it ...
Safiul's user avatar
  • 203
3 votes
3 answers
679 views

Is it possible to change Arduino Nano sine wave frequency without using PWM? [closed]

I have a program that generates a sine wave (array with predefined 8 bit values) on an Arduino Nano. ...
ojacomarket's user avatar
0 votes
1 answer
146 views

Does this inductance measuring oscillator circuit work?

I'm planning to create a circuit to measure inductance by creating a stable sinusoidal oscillator out of it with a known value capacitor. Then measuring the oscillator frequency accurately with an ...
juhist's user avatar
  • 1,631
0 votes
2 answers
389 views

Noise in sine wave BLDC controller

I am trying to control a 3-phase BLDC motor. I have already done 6-step commutation, which works fine. Now I am going for sinusoidal control with some guidance could make it good. I had get a good ...
Surendran 's user avatar
0 votes
1 answer
184 views

Sine wave generator frequency

I'm trying to build a sine wave generator following this walkthrough. Specifically, I'm attempting the Clapp circuit as I'm targeting about 113 kHz. Here is the circuit schematic: In the article the ...
Sean's user avatar
  • 173
0 votes
1 answer
75 views

Attaching Lower Impedance Part to a Function Generator

If a speaker with a hypothetical 3 ohm impedance is attached a signal generator with an output impedance of 50 ohms, will the speaker draw too much current, and overload the signal generator?
itisyeetimetoday's user avatar
3 votes
2 answers
856 views

Why does using a pure sine wave inverter help reduce audible and electrical noise in some electrical appliances?

I read on some power bank description: Stable AC Output: The built-in AC wall outlet uses a pure sine wave inverter to reduce audible and electrical noise in fans, lights, and other sensitive ...
Franck Dernoncourt's user avatar
0 votes
0 answers
724 views

Pure sine wave 500 W inverter

I am trying to come up with a pure sine wave DC to AC inverter. Above is the circuit diagram I tried simulating in Proteus 8086. I got errors as shown above, please help me fix those errors. See where ...
user avatar
5 votes
5 answers
682 views

Intuitive explanation for RMS voltage of discontinous sinewave

A sinewave with a peak voltage of 325.3V. The RMS voltage would be 230V Assumption1: If I were to run this AC sinewave through a resistor it would be the same power dissipated as running 230V DC ...
Heneer's user avatar
  • 489
2 votes
1 answer
649 views

Triangular wave response of RC circuit

I am trying to intuitively understand the response of the RC circuit for a triangular input. My understanding is as follows: Let the ramp be mt.u(t) Initially, the voltage drops mainly across the ...
prashanth's user avatar
  • 116
3 votes
3 answers
804 views

Phase shift oscillator: what is reducing loop gain and how does changing feedback resistor affect things?

I have simulated the following circuit in LTSpice: One can see that a stable sine wave with a peak of about 6.3 V is obtained, which has a frequency of 1 kHz (I calculated the RC network values to ...
Daniel Tork's user avatar
  • 1,428
-1 votes
1 answer
63 views

PWM on voltage or power

I try to implement a pure sine wave inverter based on PWM and using a microcontroller. While things regarding PWM seemed simple, I am actually confused on the below aspects: To my understanding PWM ...
George Kourtis's user avatar
1 vote
2 answers
348 views

How to drive atomizer? [closed]

I'm trying to build my own diffuser with a piezo atomizer. I'm new to electrical engineering and don't really know what I'm doing. Reading the specs for the atomizer from the description it says: ...
Sean's user avatar
  • 173
0 votes
1 answer
258 views

Does the sine wave function of a UPS matter even when there is power from the grid?

Does the sine wave function of a UPS matter even when there is power from the grid? I'm considering getting a UPS for my home studio computer (recent Mac Mini), router, sound card, speakers, and ...
P A N's user avatar
  • 103
0 votes
1 answer
251 views

Generating a sinewave on Matlab with specific harmonics [closed]

I need to generate a sinewave on Matlab so I can use the generated values, I need 1000 samples per cycle for grid simulation using micro-controller. I was able to generate a pure sinewave and it is ...
BSaleh's user avatar
  • 23
2 votes
1 answer
239 views

What do I add across the opamp to get a full sine wave?

I'm struggling to figure out a solution to avoid saturation, I believe the solution will require some component to be attached across the opamp to produce the same voltage out as voltage in (voltage ...
Cubes's user avatar
  • 23
-2 votes
1 answer
107 views

Matlab: using a small sample time for sine wave, makes the wave's frequency "accelerate"

I noticed that if I use a small sample time of DSP sine wave in matlab, the signal's frequency "accelerates": This is the signal with a proper sample time: But if I reduce the sample time ...
Christianidis Vasilis's user avatar
4 votes
1 answer
209 views

Has Don Lancaster really got his "Create Sinewaves using Digital IC's" publication wrong?

I answered this question a moment ago, and looked around for some stuff on the net to support it. The original publication is "Digital Generation of Low Frequency Sinewaves", Anthony C Davis,...
Neil_UK's user avatar
  • 165k
1 vote
3 answers
2k views

Generate a 120 degrees out of phase sine wave

I want to phase shift a sinusoidal by 120 degrees two times (in order to generate a 3 phase signal). I generated the first sine wave using an internal DAC. The sine wave is offset by 1.65V with a peak ...
JoeyB's user avatar
  • 2,119
-1 votes
2 answers
240 views

Converting square wave into a sine wave [closed]

I am trying to convert a 1 MHz square wave into a sine wave of the same frequency. What's the best way to achieve this?
RafaelCachetas's user avatar
1 vote
2 answers
293 views

How to generate a PWM low frequency sine wave without a microcontroller

I have a project (powered by a small battery) where I want an LED to slowly fade in and out. For this effect, I want to make a PWM signal that resembles a sine wave. Is there a method for this without ...
leonllr's user avatar
  • 13

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