Bricolo said:How can I build this easilly?
http://www.elecdesign.com/magazine/2000/apr0300/ifd/2IFD.pdf
http://members.shaw.ca/roma/thirteen.html
Looks like those must be very easy to build; specially the second one looks extremely simple, but is limited to 10Khz.
/Hugo – Has an old tube HF generator- to trim old radios
Here ya go
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Want easy?
You got PC, soundcard? Get free software , http://www.softpile.com/Multimedia/Audio/Review_10205_index.html ,for example, now u got signal generator
You got PC, soundcard? Get free software , http://www.softpile.com/Multimedia/Audio/Review_10205_index.html ,for example, now u got signal generator
Christer said:If you don't require low-distorsion sine waves there are several
function generator ICs, eg. MAX038, XR2206 and ICL8038. They
all seem to require just a few external passive components.
that's exacty what I was looking for
but what is low-distortion? 0.1%, 1%, more?
A relatively simple way to generate any waveform is by using a microcontroller, a look-up table or algorithm and a DAC. For a 90S8515 + absolute minimum of external components the code is really simple. You can easily get around 0.01% thd. Not to mention a whole new hobby I am sure there are more elegant DSP based solutions as well.
regards
peter
regards
peter
Bricolo said:
that's exacty what I was looking for
but what is low-distortion? 0.1%, 1%, more?
Don't expect better than 2%, maybe 1%. The sinus wave is triangle wave which is fixed in a unlinear circuit.
Ultra low distortion sine wave designs
Check out the oscillators described in these two aplication notes.
http://www.linear.com/pdf/lt1122.pdf
http://www.linear.com/pdf/lt1115fa.pdf
Check out the oscillators described in these two aplication notes.
http://www.linear.com/pdf/lt1122.pdf
http://www.linear.com/pdf/lt1115fa.pdf
do a google search under "Walsh Series" for the mathematics. Don Lancaster also has an article on this at www.tinaja.com
analog_sa said:A relatively simple way to generate any waveform is by using a microcontroller, a look-up table or algorithm and a DAC. For a 90S8515 + absolute minimum of external components the code is really simple. You can easily get around 0.01% thd. Not to mention a whole new hobby I am sure there are more elegant DSP based solutions as well.
regards
peter
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