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36 Threads found on edaboard.com: Dds Signal Generator
that generator has an external I/Q modulation input. You could do small angle modulation of the carrier that way. As a crude example, just add a small sine wave at the I input, and have a small + DC voltage at the Q input, and you will have simple 50 to 130 degree modulator. You could program a cheap Dual dds to drive both I and Q to generate
Hello, I want to buy a signal generator "not an expensive one". I searched aliexpress and found those two, what do you think is better? or if you have another one you can tell me about in the same price range, please do.
I have developed a sine wave generator with dds chip AD9833. AD9833 has an output signal of 0,6 Vpp. I use AD9833 to generate a sine wave at a frequency of 50 Hz and use a microcontroller to change the frequency (40-400Hz). The signal is amplified up to 4Vpp and with a digital potentiometer I control the amplitude. How to (...)
Hello! I want to measure an unknown impedance using an I/Q demodulator. Setup: I was thinking of using a dds (Direct Digital Synthesizer) as the sine wave signal generator. Splitting this signal to a reference signal and an excitation signal. The reference signal (...)
Hy I would like to make a trivial electronic query. I have this PC signal Hantek generator ; I would like that this signal generator feeds a bifilar coil (two coils wounded one behinds the other), one coil feeded with the signal in phase, & the other feeded with the signal 1
Using an AVR, I implemented a simple dds using an R/2R network. The output freq. I'm interested is up to 20KHz (since this is for audio usage). Since my TL071 OA won't get near the lower rail I need to DC bias it using a non-inverting summing amplifier like this one (all 1M
Have you taken a look at the dds chips from Analog devices ?
I'm designing a dds-based general purpose signal generator for my home lab, based around a dsPIC, two AD5930S dds chips and a lot of assorted op amps for filtering, level-shifting, VGA, etc. It uses a 5V digital rail, and +/-5V and +/-15V analogue rails. All are planned to be linear, not SMPS, to keep noise sources away (...)
I'm not very sure that you can obtain 1MHz output, but you can find an example on internet:AVR dds signal generator V2.0
You could check out dds Compiler for xilinx.
I've one taken a course on VHDL in University, but I've never done anything practical. Now I've decided to change it. For my first project that i want to accomplish I chose a dds signal generator. I think I'll need your help in choosing a proper device for this project, as the variety of models of FGPAs and CPLDs is enormous. After (...)
use a dds like the ad9850 from analog devices you can have a precision of 1/100e of a Hz with it and you can drive it from your pic mcu with serial bus. regards,
dds is comprised of phase accumulator, sine table, DAC. Auxillary functions may be added like frequency modulation or sweep and dithering to increase dynamic range with limited bitwidth, amplitude modulation. The implementation strongly depends on your available resources for the digital hardware, many designs are using programmable logic these day
The project has an AD9850-dds signal generator module, now my issue is how to control the signal generated by the module by use of the 8051 - that is I would like to create the frequency and measure it accurately - at the same time by the 8051 - or 2 - 8051s - is this possible ? I also need to attach an lcd - The (...)
Hi) I have a signal with bandwidth about 150Mhz and central frequency 200 Mhz. I need to divide it into 5 separate parts. So I want to down convert them by different frequency reference signals. Is it possible using dds core from Xilinx core generator? Any ideas...thanks
"Generate a frequency from 1Hz to 20MHz" is somewhat vague. Intended waveform and frequency resolution/accuracy are two points completely missing in your specification. AD9833 dds generator would be surely good for a programmable signal generator, if it's actually needed depends on your requirements. A microcontroller (...)
Hi, This might help you ... It has been done with an AVR micro ( C and some asm lang ) here :
Hi You can use the AD5933 from ANALOG since it have dds signal generator and a detector But it is a too complex IC to work with for newbe or in comper to LMC567 All the best Bobi
hi i am new to system generator for dsp . i want to generate a 30 mhz signal from dds v5 block but i was unable to understand the parameters like explicit time period and output frequency array ialso read the help but in vain .can any one give me parameter setting for this ?
Hello Everyone, Wish You All A Happy New Year. I have a simple problem that I am trying to simulate in Microwave Office. Since, I am a novice user of MWO and in general AWR, I appreciate some help in this regards. The problem goes likes this: A dds based Chirp generator output (FMCW Liner Chirp) is mixed with a Sinusoidal signal. How do (...)
Hi Use a combination of PLL synthesizer a dds chip and a mixer to produce a wide frequency range high accuracy signal generator. See Circuit cellar & elektor magazine from 2~3 month ago for project and schematics All the best Bobi
First of all, you do not need to change the lookup table (the table where you store the sine wave values) as the output frequency changes. The waveform will be always the same, the only change will be the speed that the points of the table are converted to analog signal. The solution for your problem is the dds (direct digital synthesis) technique.
Hi, All: I need to develop a code for micro-controller(PIC16F48) in order to operate dds device from Analog Device, which will produce a waveform as signal generator. I do not know how to begin the development. Can anyone give me any suggestion? I lookover data sheet,and there are many register addresses. I guess I have to figure out (...)
dds signal generator based on Atmel microcontroller: AVR dds signal generator project
Here is dds signal generator based on Atmega8. Might be helpful: AVR dds signal generator project
search for a dds chip. It work at 160MHz with sinus signal but frequency is controlled by 3 wires bus. Analog devices have a lot of this
* ADCs * Antennas * CAD/CAE * CDMA * Cellular * Clock generator ICs * dds: Direct Digital Synthesis * Design Topics * Digital signal Processing * FCC Stuff * Frequency Allocation * IEEE 802.11 * Indoor Propagation * OFDM * Op Amps * Oscillators * Pegasus (...)
yes , the tektronix AFG320 is built using a dds chip, but most of the dds chip have only 10-bit waveform DAC, difficult to get low THD&S/N also it's not easy to generate a FM signal using dds chip. if built with LUT + 16bit-DAC ,it would be very nice!
Maybe this can help need to add some code to control the LCD to display the frequency and type of waveform. Also you need to modify the code to read a keyboard and use the value entered. The program there uses UART to control the dds generator.
hi, I did a few years back exactly the thing you're trying to build. I used pic16f877 + ad9850 + hi-tech picc compiler. I used this function to load the dds (4MHz clock): void send2dds() { unsigned char data; dds_fqud=0; dds_wclk=0; data=0; PORTD=data; dds_wclk=1; (...)
How clean is "clean"? I would consider an inexpensive dds chip such as AD9834, or one of these: You will also need a clock oscillator, a low-pass filter (for the sinewave output), and a comparator (to convert the sinewave to square wave). The AD9834 includes a
You may find this page about a dds synthesizer usefull. The basic idea is very simple, and may be a good starting point for implementation in a PIC.
Hello, I want to make 3 phases sine signal generator. I will use dds from Analog Devices AD9833 for this. So I will be able to easily generate sine signals at frequency and phases that are desired. But also I should be able to adjust amplitudes of signals. So I'm looking for a amplifier that has digitally (...)
hi, i try find dds chip to generate sine and other wave (for example triangle) ??? you may try to generate some forms with use of syncronous FM of sin signal (as it done in old Yamaha FM synth eg.DX7 DX21) GoodLuck.
Analog Devices have direct digital synthesizer chip AD9852.Check there site for more info.Also you can check Circuit Cellar lacoste130/lacoste130.pdf there is a description of dds gen correct link
Hello, I'm Intersted In Solution For Level Translator For Clock signal. It Receive Input 1.8v Level From dds, Clock generator (After dds Internal Comparator) Clock Frequency Options Are 2-90MHz ROutput 3.3v Level (LVTTL) THANK'S FOR YOU'R HELP !


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