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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, It is working how it is generating sin wave?[/QUOTE So you have build a working circuit without knowing WHY it works?
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


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