Search Engine www.edaboard.com

Wave Sin

Add Question

209 Threads found on edaboard.com: Wave Sin
You can have look at the basic working theory @ Its implemented for LPC2148 but the underlying working is the same. You need to generate or use a hardcoded sine lookup table which feeds values to your PWM block and at the PWM output use a filter which acts a D
For low frequency sinewaves, phase-shift oscillators are very straightforward to implement.
Hello, Doing FFT exercises in Matlab I've discovered that for some frequencies (defined by k) the FFT of quantized sin wave alternates '0'. For k I used primary numbers. With k = 11, 13, 17, 19, 23, 29, 31, 37 it's Ok With K = 3, 5, 7, 41, 53, 67, 101, 127 FFT alternates '0'. Any ideas ? Thanks in advance. Pavel. clos
Hi My friends i need pure sin wave that Fixed at 1khz But we have two limitation 1- i need 500 mA Current 2- i Can not use transistor for that current because in some of method that transistor going to hot . power supply is 12Vdc amplitude near 5 V Thanks Your question suggests you have tried this and
Hello, I am building this circuit in LT spice but it is not giving sin wave why?
Hello, I have notices when we connect the supply to transformer like inductor there is back Voltage/EMF generated which is higher than the applied voltage also depend on the frequency of supply and Capacitor value inductor value and resistance. why does it happen? the reason behind it when we remove capacitor it does not happen?
I would like to have a 5Watt sin generator with a variable frequency between 100 KHz and 10MHz. Could you tell us a little more about the application? What voltage does the sine wave need to be at? What kind of load are you driving? When and how does the frequency need to change?
Hi all, I'm new in using DPI methodology to import C function with ModelSim I'm writing a SystemVerilog code that generate sine wave it useid "sin" function that i had imported using : import "DPI-C" pure function real sin (input real rTheta); but i'm when simulating my (...)
Hello. I am working on a dc-ac inverter. My setup is as follows: I have a DC battery of 48 volts from which I want to generate a 24V sin wave of with a 50Hz frequency. My design is a microcontroller based design where I'm using an STM32F4 type uC. I have 4 transistors (along with a driver that drives them) that make up my H-bridge. (...)
You did not informed exctly with which of those schematic were made your experiments. Moreover, this piece of code do not make sense: You are getting the inverse of the same function, f-1(f(t)): carrier = ((2 / PI) * asin(sin(2 * PI * 3000 * t))); //triangular wave I'm not experienced in Arduino, but why
Hi, I draw a simple injection locked frequency divider. Parameters in design are as follows: Technology: tsmc 0.18um RF. M0,M1: NMOS Width/Length/NF(number of fingers)=3um/0.18um/6 M2: NMOS Width/Length/NF=3um/0.18um/9 Inductor: center tapped. Width/Space/Radius=9um/2um/51.8um Input: 26GHz sin wave, peak to peak voltage swing 0.2V
very-good Pure-sin-wave Inverter Technology transfer . With latest technology and reliable with low cost . These specifications are in general conflicting, which are also affected by the power range that you had not mentioned yet.
I would like to model signal noise from an electromagnet. I think to model the noise as a voltage sin wave. But how do I know what noise I need to filter out? Any help would be appreciated. Thanks in advance.
Hi I am looking for IC or circuit which can generate a phase locked sin wave , in phase with the Analog PAL TV sub-carrier. Something like MC44144, and if it can generate in phase and quadrature phase it will be great. the purpose is adding color overlay on Analog TV Picture, using the composite signal. I found and old post with the (...)
I agree that the lousy old LM324 opamp has trouble above 2kHz. A 200Hz squarewave has harmonics above 2kHz.
yes...got the answer...and what about the formulae for sine wave What about it?
It looks like a harmless warning that you get due to how the BRAMs are used in those DDS cores you use for your sine waves. First step is to read that Xilinx Answer Record 39999 to be sure what that is about. Second step is to make a small testbench for your design to see if you get the expected sine waves and multiplied (...)
that hysteresis curve is for sin wave. what is your plot for square wave and what do you expect from that? I didn't plot resistance of memristor but I think you should perform dc sweep.
I was following this tutorial Written by tahmid, I am confused with couple things, Why TOP value is chosen as 999 and not something else (like 1200 or 499) is this just to set the PWM frequency to 16 Khz or is there some oth
I need to excite the coil on the left of the model with wave 5*sin(2*PI*f*t) and see the effects on the others. How can I do this. I have attached the model file 106994 and a screen shot of model. 106995
Q=CV is the fundamental nature of capacitance I=dQ/dt=CdV/dt and for a sine wave v(t)=sin(wt) (w being omega) d(sin(wt))/dt = w*cos(wt) so I(t)=C*w*cos(wt) There is your w term as a scale factor in I, impedance is dV/dI, so w (omega) in the denominator and there you go.
Hi to All, I have 2 questions about PAR. 1) Is it right to say that the constant envelope modulations such as FSK or GMSK PAR value is equal to 0dB? 2) Crest factor for a sin wave is 3.01 Crest factor for a FM modulated signal is 0dB.
First u need to create a block which generates the required signal. Signals can be sin wave(which can be generated using lookup tables or Cordic method), ramp signal, or you can search the internet for the popular tones and their generation equation. The previous link shared by udayan92 is helpful. Afterwards a proper testbench is needed to (...)
i need verilog code of sine wave generator....i tried with cordic algorithm but i cant able to proceed....plzzz help
since fs=2*fc in this case sampling timing (ts) occurs on time 2*pi*fc*(1/2fc), 2*pi*fc*(2/2fc), 2*pi*fc*(3/2fc) etc. at this moment ( pi, 2pi, 3pi,...) sin funciton is zero. So you see graph around zero. You need to increase the sampling freq. Another words, in this case you always sample sin wave at zero (...)
for a sinusoidal signal: y = A sin( 2 pi freq + phase) where A=the amplitude, freq = frequency. (Gives you the number of cycles per second) phase in a simple way tells you at what angle does the sine wave starts. The same concept applies for any periodic signal. Again trying to put it in simple terms: Signals (...)
Idc_r1 = Vdc_r1 / R1 But V_r1 is a sinewave tip: V_r1 (x) = Vpeak * COS (x) - Vout , if -a ≦ x ≦ a where a = ACOS ( Vout / Vpeak ) V_r1 (x) = 0 otherwise Vdc_r1 = 2 / (2*PI) * ∫ V_r1 (x) * dx from x=0 to x=a Vdc_r1 = 1 / PI * , from x=0 to x=a Vdc_r1 = 1 / PI * [Vp
I want to know the relation between sampling frequency (Hz) and sampling rate (sample per second). For example, a 1 Hz sin wave sampled at 8000 samples per second. Each cycle of the 1Hz tone will span all 8000 samples (since its period is 1 second). Thus sampling period will be 1/ (8000-1) s Or sampling frequency will be 8000-1 ≈ (...)
i need circuit diagram for generate sin wave 50 hz using xr2206 and a circuit for generate triangle 5KH--15kH and i eant to adjust the amplitude and frequency of each other as i want I made a waveform generator using an XR2206. The IC can produce three waveforms simultaneously, and (...)
Hi, I'm looking to turn multi wave data (typically low frequency, 0.5Hz carrier wave -> 5Hz as harmonics) into its harmonic waveforms. essentially its an applied waveform in the form (0.1*sin(t*pi)+0.06*sin(t*3*pi)+0.04*sin(t*5*pi)...etc)) and a response from a (...)
Hello Mr. Mithun, To generate pure sine with 16F73 you must need a lookup table using calculated sine point. Because 16F series doesn't have enough speed to calculate Multiplication for (i=0; i<15; i++) { teta = ( (float) i / 15 ) * 3.14159; sample = (int) (255 * sin ( teta )); PWM1_Set_Duty(sample); } Try this lookup
Hi, I am working on a project for which I need to generate two sin wave signal with 1F and 6F frequencies . F can change from 5HZ - 150Hz. I thought to use some VCOs in combination voltage gain ckts to achieve this but could not find a sin VCO to work in HZ frequency range. I don't need sin wave to put (...)
if the frequency of sin wave change, signal compressed.
I appologize i am unable to understand your requirement clearly: do you want to convert sinosoidal output of an oscilator to square wave clock output with minimal phase noise/jitter?
Hello! I have a silly question! :) If I generate a sin wave with the amplitude of 1V and play it in Matlab, will I see on the soundcard output the same amplitude of 1V (of course using an osciloscop) ? Thanks in advance!
Can you suggest me a method to print 1 Hz sin wave on the Glcd component? NOTE: Glcd is controlled using PIC18F4525. sin wave is converted into digital data and saved in continuous locations. The digital data should be printed in the glcd component.
pls help me ... if any modification is required... am currently building a 350 va sine wave inverter with series based charge regulator
Why do you say that? The question title (and also the text) says "multiplying a sin with a DC to get a square wave". That's at least unclear, because it involves an amplitude measurement with unspecified behaviour. Possible are e.g. peak detector, RMS detector. But which filter characeristic?
Hi! I'm getting stock on creating a LUT for waveform in this case sin wave... what about when I want to refer it to let say 2.5V. Here you are examples . The outputted data is for the DAC input, which output voltage arrangement is out of the synthesable V
Dear all, I am was not convinced or may be could not understand the correlation in matlab i.e. xcorr function. So to test I simple made two exactly similar sine wave without any delay, and it gives me delay of 21. I cannot understand why. please first see the code below fo=200; fs=2500; t=0:1/fs:.008; x=sin(2*pi*fo*t); y=x; %n
how to generate variable frequency sin wave in pic
You will have very poor efficiency (very high losses) if you do manage convert the square wave output to sine wave using some sort of filter. It's better if you can redesign your circuit using sinusoidal pulse width modulation (SPWM). Agreed. As I said, it's pretty difficult to turn a (...)
hi all, Please can any one tell me how can write this matlab instruction "u = 0.5*sin(2*pi*ftest)" for a sine wave in 24 bit fixed point representation? thanks a lot, Noura
Hello All, I am trying to generate a sine wave with frequency 5GHz with 0.4V offset and 0.4V amplitude. This is what I do. // Testbench `timescale 1ps/10fs import "DPI" pure function real sin (input real rTheta); module testbench; // Declarations parameter sampling_time =1; const real pi = 3.1416; bit (...)
Hi i want to generate a 20kHz spwm for an inverter, so i need a 20Khz triangular and a 50Hz sin wave but i don't now how to generate these waveforms. anyone can help me please? thanks for your help Farzam Hi Farzam This is too easy ! for triangle wave , you can easily use a relaxation oscillator , which is based on (...)
%program to generate sine wave f= input('enter the frequency in hertz of the sine wave'); t=0:.0001:5; y=sin(2*pi*f*t); plot(t,y); ylabel ('Amplitude'); xlabel ('Time Index'); TITLE ('sine wave'); %with samples t = ; % Time Samples f = 500; (...)
Hi all; i want to measure the frequency of a sin wave passed through HEF4093BE NAND gate Schmitt trigger to be furnished and this frequency is feeded into pin RA2 of PIC16F877A; and from this pin i want to read the frequency. i made the following code for that purpose but instead of reading the frequency it is counting the numbers with a very high
Hi, I'm trying to generate waves of the form, p = a*cos(theta)*exp(i*w*t), where t is the time, w is the frequency and theta is just an angle. In my VI (attached), I used exp(i*w*t) = cos(w*t)+i*sin(w*t) and formed this using the Re/Im to Complex Function. And I used four different values of theta. However, when I output the values (...)
I wish to have spacio-temporal accuracy so am using a continuous wavelet ttransform. I have noticed that when using fft on a sin wave signal I get a nice spike around the frequency, but when doing a cwt (with cgau6 wavelet - a sin wave combined with a (...)
Hi, I have a question that seems simple but is surrounding my mind. From my understanding, a signal can be represented by its in-phase and quadrature componentes (which are low pass signals). The relationship is the following A(t)*cos(wt +phi(t) ) = si(t) * cos(wt) - sq(t) * sin(wt) , being si(t) and sq(t) the associated I and Q signals resp