1 Meg Hz Sine Wave Generation

[link555]

Hello I am new to DSP programming and I am trying to figure out where to start.
I need to create a 1Mhz Sine wave.

IS this possible?
Which Dsp is best suited for this?

Thanks Very much!

 

[twanage]

You'll need to say how many bits of resolution you need, as speed of the DAC is usually inversely proportional to depth?

 

[link555]

16bits min

 

[RBB]

Here's one of my posts from this thread:

Are you using design compiler? If so check out...
https://www.synopsys.com/dw/ipdir.php?c=DW_sincos
https://www.synopsys.com/dw/ipdir.php?c=DW_fp_sincos
https://www.synopsys.com/dw/ipdir.php?c=DW02_sincos
https://www.synopsys.com/dw/ipdir.php?c=DW02_sin

If you're not using design compiler.
You can use a look up table. This is the easiest implementation. It is simply a ROM with the sine wave stored in it, for a given phase. So your theta would be the address for the ROM. You'll only need to store 1/4 of the sine wave to take advantage of the symmetry of the sine wave. For cos you simply take advantage of the trig formula: cos(theta) = sin(pi/2 - theta). Excellent paper on this by Lionel Cordesses called "Direct Digital Synthesis: A tool for Periodic Wave Generation."

Or you can use a DSO, which is an unstable IIR filter. There is an excellent paper by Clay Turner on the subject: "Recursive Discrete-Time Sinusoidal Oscillators"

Or you can use a Cordic algorithm...
https://www.google.com/webhp#hl=en&source=hp&q=Cordic+algorithm&aq=f&aqi=g10&oq=&fp=79a46ede2c2a175d

 

[link555]

Thank you very much for the excellent info, however I am still wondering if the 1 meg frequency requirement is to high for some DSP's?

I would have tried this in a micro, but I could not find PWM able to go that fast.

Thanks very much!

 

[RBB]

How fast of a clock do you have available?

 

[link555]

Any Crystal I choose...?