Homebrew 3 Channel Pure SIN Generator ( 0 ... 60MHz )

[Peterae]

Hi Yucca
Sounds amazing, most wouldnt realize or appreciate the time you will need to put into this.

The spectrum is a great idea and could be very handy indeed.

The maximun ADC peak would be good if it could log the 3 best peaks maybe in order if you are able to, i am thinking there maybe more than 1 sweet spot which could give clues to what's going on.

Peter

[Yucca]

@GK & Otto,

Squares may be good for TPU, that's why I also want to include the following stages outputing into 3 seperate front panel BNC sockets:

variable opamp -> FET driver -> N-FET (sourcing external power)

this should give me PWM capability (10...90%) on all three channels up to maybe 10MHz. Of course they will also be perfectly phase locked and very frequency stable thanks to the temperature compensated main oscillator.

If anyone else wants to build one I will send the code and instructions to any other OU member gratis.

Yucca.

[Yucca]

Hi Yucca
Sounds amazing, most wouldnt realize or appreciate the time you will need to put into this.

The spectrum is a great idea and could be very handy indeed.

The maximun ADC peak would be good if it could log the 3 best peaks maybe in order if you are able to, i am thinking there maybe more than 1 sweet spot which could give clues to what's going on.

Peter

lol Peter, you know more than me about time spent with MCU software, assembler language is MUCHO work and gets VERY difficult in larger projects. I have written one small system with GUI in assembler but mainly mantained other systems code, the programmers comment text is VERY needed and even then it's painful.

good idea about 3 best peaks.I would have to write some routine to record only local gradient maxima otherwise it would only record several peaks from the same overall highest curve.

Yucca.

[giantkiller]

Good work! Keep on truckin'

@GK & Otto,

Squares may be good for TPU, that's why I also want to include the following stages outputing into 3 seperate front panel BNC sockets:

variable opamp -> FET driver -> N-FET (sourcing external power)

this should give me PWM capability (10...90%) on all three channels up to maybe 10MHz. Of course they will also be perfectly phase locked and very frequency stable thanks to the temperature compensated main oscillator.

If anyone else wants to build one I will send the code and instructions to any other OU member gratis.

Yucca.

[otto]

Hello all,

@Yucca

very nice work.

As least you cant damage this oscillators like Im doing it with mine because of runaways every day, ha,ha.

Otto