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

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

Digital Signal Processing :: 09-16-2011 18:22 :: vimalkhanna :: Replies: **1** :: Views: **784**

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

ASIC Design Methodologies and Tools (Digital) :: 05-21-2011 09:23 :: FvM :: Replies: **9** :: Views: **1423**

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

Digital Signal Processing :: 04-24-2011 18:35 :: fasto2008 :: Replies: **0** :: Views: **1605**

in text book , the delta sigma modulator can be analyzed in **freq**uency 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 **freq**uency ?
if the (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 03-29-2011 07:45 :: pianomania :: Replies: **1** :: Views: **869**

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

Analog Circuit Design :: 02-18-2011 07:37 :: mixed :: Replies: **0** :: Views: **751**

Hi techies,
I am facing information loss in my spectrum after decimation.
My 40MHz (with center **freq**uency 40MHz) spectrum contains 8 sub-channel of QPSK having 5MHz bandwidth (respective center **freq**uency 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 (...)

Digital Signal Processing :: 01-22-2011 14:48 :: bluespec9 :: Replies: **1** :: Views: **788**

What is your ADC **sampling** **freq**uency. 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 (...)

PLD, SPLD, GAL, CPLD, FPGA Design :: 01-07-2011 02:21 :: amitjagtap :: Replies: **4** :: Views: **3118**

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

Digital Signal Processing :: 11-29-2010 21:57 :: RBB :: Replies: **4** :: Views: **4125**

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

Microcontrollers :: 10-25-2010 16:39 :: rankiran :: Replies: **0** :: Views: **1375**

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!!!

Digital Signal Processing :: 09-20-2010 14:00 :: ajayreddybireddy :: Replies: **4** :: Views: **4113**

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

Digital communication :: 03-31-2010 10:55 :: HMZ :: Replies: **3** :: Views: **2284**

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....

Microcontrollers :: 12-25-2009 21:55 :: anandpv2009 :: Replies: **5** :: Views: **1469**

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

PLD, SPLD, GAL, CPLD, FPGA Design :: 10-06-2009 07:11 :: FvM :: Replies: **6** :: Views: **1570**

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 (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 09-02-2009 02:13 :: tdy :: Replies: **5** :: Views: **1017**

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.

Digital communication :: 08-22-2009 16:17 :: Mad I.D. :: Replies: **1** :: Views: **985**

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

Elementary Electronic Questions :: 08-13-2009 05:22 :: dil639 :: Replies: **0** :: Views: **913**

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 **freq**uency 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 (...)

Microcontrollers :: 07-20-2009 21:05 :: prathosh :: Replies: **0** :: Views: **5963**

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 (...)

Digital Signal Processing :: 06-17-2009 03:02 :: sun_yah :: Replies: **0** :: Views: **1639**

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

Digital Signal Processing :: 02-16-2009 08:07 :: rramya :: Replies: **2** :: Views: **1065**

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

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 11-21-2008 04:12 :: manissri :: Replies: **1** :: Views: **759**

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