A direct digital synthesizer (DDS) creates waveforms from a single frequency reference clock. Typically the reference frequency is fed into a numerically controlled oscillator (NCO) that controls the final frequency and waveform type from where the quantized digital data is converted to analog using ...
-2
votes
1answer
41 views
Xilinx DDS IP for modulating a carrier
I explored XIlinx IP for DDS, and am able to get 2 different frequencies (samples) based on the input clock. But what I want is to frequency modulate the clock itself.
So basically when I say I ...
3
votes
2answers
89 views
UHF Phase Modulation
I would like to design a system that produces -10 degrees and +10 degrees phase shifts at 409.6MHz (Basically BPSK).
The way I'm thinking about approaching this is by using a DDS to generate the BPSK ...
-2
votes
1answer
123 views
Simple Implementation of the AD9834 DDS Chip [closed]
I'd like to see a simple implementation of the AD9834 DDS chip. I'd like to use this in a homebrew Amateur Radio build.
The test circuits in the datasheet were rather confusing, and the ...
6
votes
2answers
1k views
Driving 50W-250W ultrasonic transducers with sine: Any Class B 135KHz monolithic power amp ICs?
My project needs to drive a medium power ultrasonic piezoelectric transducer from a sine wave (/ sawtooth) sweep generator that sweeps +/- 2% of the transducer resonant frequency.
The question: What ...
1
vote
2answers
183 views
Generating various emission modes via DDS
I know it is common to generate sine waves via Direct Digital Synthesis (DDS). What I would like to know is if it is possible to generate a modulated signal via DDS and if so what would be a practical ...
3
votes
2answers
348 views
What kind of effects does a relay have on signals?
Currently I'm working on a DDS based function generator. The idea is to use an AD9834 chip that will generate a triangle/sine or square wave. With some amplification electronics I want a configurable ...
