Problems with DTMF Generatiom

[Angus Anderson]

Thanks Guys-
I'm going to build a 2nd order LPF using an opamp, fiddle with the gain and then see what improvements I get. Thanks for the tips

Angus

[mischl]

i had also some problems a year before with dtmf generation...

at last, i used a 18f242 instead a 16f876 because it is possible to use a 10 mhz oscillator and on pll inside it is 40 mhz.

about filtering, bruce's hint helps me most :
http://www.picbasic.co.uk/forum/show...99&postcount=3