[sdiy] Possible BBD replacement!

[karl dalen]

Have you realiced that the Holtek/Princeton
HT8970/PT2399 (same IC) might be a current
sink output on its VCO frequency pin! pin 6.

I suggest you try connect your NPN expo to this pin (trough a 680ohm
currentlimmeting resistor, just for safe) and hopfully get your self
a voltage controlled digital delay, wich if the datashet are correct
give you better performance then the avarage BBD.

Ii might then be possible to shrink the delay time a tiny bit more,
maybe its possible to get into the milli sec region!

If this is right we can start talking karplus-strong and real audio
FM modulation modules here at diy list. :-)

Reg
KD 

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