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Questions tagged [sine]

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0
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0answers
26 views

Converting a high frequency ac signal into square wave without creating a low pass filter by accident

Ive been building an Induction heater for a while now and wanted to get the frequency tracking to work properly. I need to convert the up to 600V ~100khz sine wave signal into a square wave, ive ...
1
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3answers
95 views

crystal oscillator Application

(Note: I am aware that crystal and oscillators are two different things but a lot of people use them interchangeably so I am using it in the title.) My question is about Oscillators, all oscillator ...
0
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0answers
26 views

Calculating reactive power given u(t) and i(t)

I would like to calculate the reactive power of a given two-pole which has the following voltage and current characteristic. \$u(t) = 2+5sin(\omega t)+2sin(2\omega t+\frac{\pi}{6});i(t) = 10+3cos(\...
0
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1answer
47 views

What happens in a generator so that we get a sinusoidal voltage as an output?

I read this online, " For a travelling magnetic field in a circle, the induced magnetic field in the armature of the generator will be sinusoidal. That's why the generated voltage is a sinusoid, ...
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0answers
34 views

How do you calculate average absolute value of a sum of sin functions with different amplitudes and frequencies?

I cant seem to find the answer anywhere. I remember there was a simple formula for doing this but I dont have the book with it anymore. Finding where the function is positive and where is negative and ...
0
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0answers
18 views

How to add back emf as part of this sinusoidal commutation equation

I recently found a nice article on sinusoidal commutation which has a simple exposition of the subject. The torque is derived from first principles but the equation seems not to include BEMF. Does ...
0
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1answer
93 views

Need a circuit to convert 230V sine wave into 5V square wave

We have already obtained our result using transformer for our college project ,but can't find circuit to convert 230V sine wave into 5V square wave which is supplied to microcontroller. Edit: Our ...
1
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1answer
156 views

10MHz Sine Wave Generator

I have been looking for some time for a good design for a ~10MHz sine wave generator, with variable frequency from about 5-20MHz. The max required peak to peak amplitude is 10V. Many suggestions on ...
0
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1answer
87 views

Generating sinewave from a pulse train by using a micro-controller

I want to create sine waves from 0.1Hz to 10Hz which are controlled from a software. For that I thought I can use micro controller as an interface between the PC and the sine wave signal. But if I ...
0
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4answers
92 views

Is a motor-generator set a reasonable way to get the purest waveform electricity?

It looks like audiophiles go as far as installing separate powerlines to power their high quality audio systems. The motivation is that the amplifier and other hardware would run cleaner when the ...
3
votes
2answers
74 views

Relation between the impedance of speaker and amplitude of sin wave?

I have an oscillator producing a sine wave with amplitude 3 V (so it oscillates between +3 V and -3 V). The oscillator is at about 500 Hz. I connected this to an 8 ohm speaker and I hear the sound ...
12
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10answers
4k views

How to check (with DIY methods) if an Inverter returns a Square or a Sine Wave?

I do not have an Oscilloscope, but I want to check if my 12V DC to 230V AC inverter does produce a sine or a square wave. Any way to verify that? I know how a sine wave and a square wave sound, so ...
0
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1answer
46 views

sinewave input input induction motor

If we put for standart 3 phase induction motor sinewave voltage input, will we get sinewave current if we measure motor current with osciloscope. At least sinewave like current ?
1
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2answers
58 views

Circuit for converting motor tacho-sensor sine wave output to 5V TTL for MCU

I'm trying to measure the speed of a washing machine motor. The motor has a speedometer attached to it, which generates a sine wave with frequency equal to rotation frequency of the motor. I'm ...
3
votes
1answer
68 views

Confusion about what EM fields really look like, and how that relates to data transmission, waveguides etc

After a discussion at work a few days ago, I realized I don't have a very good understanding of what RF energy is truly like. I've always thought, via physics and EE classes, that all EM waves (...
23
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17answers
10k views

What is a sine wave?

This came up when a student asked me. A simple question one might think. Except... how to define one without tautology? That is, without using the word "sine" (or cosine for that matter). Wikipedia ...
1
vote
1answer
72 views

Why can't phasors be equated to a sinusoid?

I'm having trouble understanding why a phasor for an AC sinusoid, let's say voltage (represented as Vrms/_50° for Vsin(ωt + 50°) to a current, for example) cannot be equated to the sinusoid in ...
0
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1answer
69 views

How can I modify this working circuit to reach 1V peak to peak voltage?

It's a 100 kHz sine wave generator. But I want to reach 1V peak to peak voltage.
1
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2answers
70 views

How do I modify this working circuit to work with a single 0 - 5 V rail?

I want to build a sine wave generator, but I have just +5 V and 0 V. I build the schematic in LTSpice. If I try with +5 V and -5 V it works very well, but when I try with +5 V and 0 V it doesn't works ...
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2answers
305 views

What is the most useful sine wave oscillator circuit? [closed]

I need to obtain two different pure sine wave with frequencies 3kHz and 5kHz. Only allowed components: all type of op-amps, resistor, capacitor, inductors, diode, transistor. Sine waves will be ...
0
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2answers
89 views

Sine Function on Simulink

I'm trying to add the following function on my Simulink model. where C, B, and N are already variables in my file. Is the correct way to multiply omega by the gains 3N and N/2 an input that into the ...
0
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2answers
511 views

1Hz Sine wave oscillator - Multisim

I'm trying to create a 1hz sine wave oscillator. This is my current design: Frequency is given by: f = 1/(2pi*RC) where ...
0
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0answers
28 views

Generating sine wave using Xilinx block-set in Matlab

I want to generate a sine wave with 2.5 amplitude with 50 Hz frequency, which is to be fed to a PWM system using Xilinx block-set in Matlab. I tried giving sine wave using a gateway in but the output ...
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votes
1answer
135 views

Which part in the sine wave can let a LED light? [closed]

I connect a piezoelectric material with a LED(positive to positive,negative to negative), pressing and releasing piezoelectric material to produce a sine wave to feed LED ,and i found when i release ...
-3
votes
1answer
137 views

Sine to Square only with a MCU

I know several topics already talks about this but I didn't find my answer yet. Is it possible to convert a sine wave to a square wave only with a MCU ? Both wave are only a matter of changing ...
4
votes
3answers
679 views

Sample sine wave [duplicate]

I need to sample a sine wave in order to create a lookup table. I know the Shannon theorem but I still don't understand how to apply it. I want to have 256 discrete samples of the sine wave that will ...
-1
votes
2answers
222 views

What's wrong with my sine wave generator?

I was given a task to generate a sine wave by using TLC2274ACN. The circuit is as follows. But at the output i'm getting a DC voltage when I measured it in Oscilloscope. I believe that the circuit is ...
2
votes
1answer
335 views

How to offset AC voltage with varying input?

I want to offset an input sine wave, while being able to adjust the input voltage. For example a sine wave of +-3 V should be offset by 1.5 V such that the sine wave never goes below 0 V. However I ...
-1
votes
1answer
906 views

Sine Wave Generator Circuit - Bipolar

I have this sine wave generating circuit working. It is based on an application note from TI (http://www.ti.com/lit/wp/snoa839/snoa839.pdf). we are driving an inductive sensor with a 2KHz sine wave, ...
2
votes
3answers
495 views

Mains voltage waveform on oscilloscope

I connected the oscilloscope probe to the mains supply but i find its waveform not excactly pure sine wave, So im wondering if there are problem in my scope or something else.
1
vote
1answer
60 views

Manipulating Amplitude and Axis of symmetry of BUBBA oscillator in Simulink

So far i have a bubba ocsillator that can produce smooth sinusoidal waves, but the output waveform is asymmetric about the y-axis and the amplitude is not 1. What exactly do i need to do to :- Make ...
0
votes
1answer
293 views

triangle wave form to sine form through band pass filter

Why and how does this active band pass filter change a triangle form to a sine form? I know that the band pass filter consists of a low pass and a high pass , so it cancels out some frequencies , but ...
0
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0answers
103 views

Driving a flyback with pure AC sine wave

I am quite confused about flyback drivers. I have a high frequency (up to 50 kHz) AC sine wave generator, and I would like to use it to generate some arcs on a flyback. So I thought I could just wind ...
0
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1answer
70 views

Time period of sine wave

I need to plot the time period of sine wave (wt) in rad. Am using `rad = asin (complex(Vm));` for getting the angle in rad. While ...
0
votes
1answer
149 views

Half of half cycle of sine wave

How can I identify the increasing and decreasing side of half cycle of sine wave using MATLAB code (.m file). For example the flag should set 1 if the amplitude of sine wave is increasing from 0 deg ...
0
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3answers
123 views

Bubba Oscillator - Smooth sine curve generation

I am trying to simulate Bubba Oscillator using MATLAB, so far i have had success getting both sinusoidal and cosine curves from below circuit : I have used finite gain op-amp with gain = 100000; and ...
7
votes
4answers
2k views

Sine generator - Bubba Oscillator

I am trying to simulate a Bubba Ocsillator on MATLAB, Simulink . The problem is that i am not able to generate the sinusoidal from the circuit. This below is my circuit : And this below is my ...
3
votes
6answers
609 views

Can a rectified sine wave still induce voltage?

I would like to learn more about the behaviour of a transformer when the primary coil current is not the standard AC sine wave. What happens if the current supplied to the primary coil takes the ...
0
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1answer
28 views

How to determine the Peak Factor of a multiple frequency sine wave of different amplitudes?

Peak Factor of an AC signal How to determine the Peak Factor of a multiple frequency sine wave of different amplitudes? Like in the given question:
1
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1answer
302 views

Why does my active low pass filter produce triangle waves?

So here's what I'm trying to do: Given a square wave provided by my arduino, use a nth order active low pass filter to modify the square wave into a sine wave by filtering out upper harmonics. This ...
1
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1answer
186 views

Noisy RLC circuit

I have made a printed circuit board to test different inductor and capacitor values at their resonant frequencies. I am trying to measure voltage drop when two coils are resonantly coupled at ...
4
votes
2answers
1k views

How to convert sine wave from an oscillator to TTL signal for microcontroller?

I tried to measure inductance by using a colpitts oscillator to generate sine wave. It works. I need to convert the sine wave to 5V square wave to feed to a microprocessor. The sine wave is coupled ...
-1
votes
1answer
399 views

How to find the average value of the half rectified sine wave

The question is as follows: I get part (a), but how do they get that answer for part (b)? The answers are stated below the question? How do they get the average value of the half rectified sine wave ...
-1
votes
1answer
439 views

Driving load with sine wave from signal generator

I would like to use a signal generator to generate a sine wave. This sine wave will then need to drive an inductor as part of a transformer. What is the most efficient way to give this signal greater ...
0
votes
2answers
3k views

How to add DC offset to a sine wave (so from -2.5V - 2.5V to 0V - 5V)?

I have a sine wave with a minimum peak of -2.5V and a maximum peak of 2.5V. I want to add a DC offset of 2.5V (using a separate power supply so no positive clamper) in order to get a sine wave between ...
4
votes
1answer
678 views

Modified sine wave inverter

simulate this circuit – Schematic created using CircuitLab Recently I've been trying to improve my understanding of inverter technology. I understand there are three main types: square wave, ...
0
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1answer
111 views

Active Filter and Sine to Square Conversion Issues

Background: I am currently using a SparkFun Electret Microphone and am needing to both filter and amplify the signal before turning it into a square wave to be interpreted by a FPGA. The mic itself ...
0
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1answer
455 views

Phase shift between pole voltage and line-to-line voltage (3 phase)

I understand that the pole voltage phase shift is 120degrees for 3 phase and the line to line voltage is equal to the difference in 2 pole voltages. However, how do I work out the phase shift between ...
-3
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2answers
261 views

Is there a real difference between the voltages produced at the negative and positive ranges of the AC sine wave?

This a general electrical question. When reviewing the AC sin wave, we note that the curvature of the wave fluctuates between a positive and negative 180 degree range. Is there a real difference ...
2
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3answers
845 views

Why a sinusodial signal expressed by a cosine function instead of a sin function?

In the signals and systems course one of the first things that we see is a sinusodial signal wave. And they say its expressed like \$A\cdot\cos(\omega t + \phi)\$. But why we use a cosine function ...