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# Freq Sampling 67 Threads found on edaboard.com: Freq Sampling

## sampling of signals......

I can help you ? Suppose you have a sine signal at 100Hz.termination Res. 600 ohm. Pass this signal into one input thru an 4069 analog switch gate.Use a pulse signal on other gate with freq. >1Khz. so that we get a pulsed sine signal at output which is your sampled signal. Now take this thru an RC integrator and you shall see the restoration of o

## sampling an slow freq timer after fast stobe - hard problem detailed below

The below construct makes a synchronized counter value available in the fast clock domain: always @(clock_S) cnt <= cnt + 1; always @(clock_X) begin edge_det <= {edge_det,clock_S}; if (edge_det == '01') cnt_sync <= cnt; end; Alternatively, a gray coded count value can be transferred safely without synchro

## CIC filter and simulink simulation problem

i am trying to design a decimator for sigma delta converter . my decimation factor is 48. from material i found i decided on a CIC filter for first stage (decimation of 24) and a CIC filter as second(decimation of 2). sampling freq =3840 KHZ Fin = fin = 0-80khz stop band attenuation = 100 dB About the SINK filter according to Hogenauer's

## what is the meaning of delta sigma noise in time domian?

in text book , the delta sigma modulator can be analyzed in frequency domain. for example , assume it is white noise, secondly, the power spectrum density is within -fs/2 sampling freq , but why ? what is the physical meaning or phenomenon in time domain when the noise has higher frequency ? if the (...)

## what can be limations of resistance and capacitance values for analog circuit design

for biomedical application delta sigma adc resistance & capacitance values calculated are 2M ohms & 25 pf for 20 khz sampling freq are the resistance & cap values possible for 180nm UMC library.. can they be fabricated

## Decimation causing information loss over spectrum edge

Hi techies, I am facing information loss in my spectrum after decimation. My 40MHz (with center frequency 40MHz) spectrum contains 8 sub-channel of QPSK having 5MHz bandwidth (respective center frequency of 22.5, 27.5, 32.5 ...52.5 and 57.5). sampling freq of this spectrum is 160M. I am shifting this spectrum to (...)

## Program in VHDL to control the relay

What is your ADC sampling frequency. If sampling freq is too much high so that your required value is coming very often, then in this case the relay will on off very fast. Here we assumed every thing is working OK. If the EMI noise is generated by some means like AC motor or something nearby then it may force relay to (...)

## FIR FIlTER DESIGN using fir1 funtion in matlab

I assume your passband is 0-2kHz and not 2MHz. is referring to a normalized frequency which is , so your Matlab function for fir1 would be.. B = fir1(order, 2e3/(10e3/2));

## dsPIC starter kit - dsPIC33F for non-speech application

I want to implement an active noise cancellation algorithm to minimize noise from machines. I have chosen the dsPIC starter kit DM330011 with audio codec with am max sampling freq of 48kHz . Since I am not handling speech, will the compression-decompression be necessary? What is the significance of these processes? Should the on-board audio cod

## to perform DFT on a simple sine wave

hello, anybody please help me how to perform DFT on a sine wave of freq about 1000hz, without using MATLAB FFT function. please help me I am new to MATLAB!!!

## Help me with constellation diagram plotting of received signal

what is the your modulation type? more info plz it may be because of many reasons for example freq offset or sampling in middle of symbols put your plot here

## how to store sine wave using pic16f877a

you can use sampling technique. sample your input signal (frum adc) with a sample rate twice(or higher) of the maximum signal freq.Store this reading to eeporm or memory card etc....

## Please guide me to match this timing diagram

I have already create LRCK (which is sampling freq. 32kHz) and BCK (which is bit shifting freq. 512kHz)Not correct. Even in your unclear diagram (there are much better in any TI PCM chip datasheet), you see, that BCK must be at least 32*fs respectively 1024 kHz. I don't know how to detect when to start shift my data.[/quote

## sigma-delta AD question: judging AD ability

I do not know much about the sampling theory, but the dft process is a sampling process, right? so the more points it samples the more accuracy it achieves. my carrier freq is 10M and the input signal is 10K and the time interval is 500us after it settles. that means I have to sample more than 10000 times to get the anti alias result. but (...)

## Help needed urgently with turbo matlab codes

Fs=250e3; % sampling freq N=20; % How many carrier periods to look fc=50e3; % Carrier frekq. fs=3125; % Data frekq. t=0:1/Fs:N*1/fc; carrier=cos(2*pi*fc*t); modsig=square(2*pi*fs*t); BPSK=carrier.*modsig; BPSKn=awgn(BPSK, 50); % 50dB SNR Whola.

## Spectrogram to get the frequency contents

I want to read the signal frequencies that can be seen in the spectrogram using matlab function(spectrogram). But when i give different sampling frequencies i am getting the display of my signal at different frequency points.This is explained below. I am using the below code to create a sine wave with (...)

## PC oscilloscope using PIC 18f4550 to plot high freq signals.

Hello everyone. This is my first post in this forum. I am a student of 4th B Tech (ECE). I have planned to build a PC based USB oscilloscope using PIC 18f4550, to plot high frequency signals upto 10 MHz, in these vacations of mine. I am thinking of using external ADC made by TI for signal sampling,( TLC5540) which has sampling rate upto (...)

## wm9713 audio codec - noise in bluetooth audio

Hello all, I am using wm9713 audio codec in my project. Audio is transferred to Bluetooth module(BTM) using PCM link. The PCM link operates at a freq of 8KHz sampling rate. PCM data to BTM is directly transferred from a sigma delta ADC. At ADC sampling freq of 8KHz, I hear a noise like "rrrrrrrrrr" in the background (...)

## design LPF given i/p signal its sampling freq, req o/p

Hai everyone, I have an i/p signal x = 1 +0.5* sin(pi*t) where t = , basically a signal sampled at 100 Hz. I need to filter out the d.c. component i.e. get 1 as a constant output so for which I have to design a low pass filter. can any one tel me how to design low pass filter in MATLAB Thank you

## how to chose the input freq for dyanamic meas of ADC

i need to meas the dyanamic performance of ADC what input freq i should chose to calculate the dynamic perf my sampling freq is 4msps