[sdiy] integrator / capacitor leakage

[JH.]

> You can do a discrete very high speed NCO by using regular
> logic, a simple 16 bit unit wouldent need many, about 5 IC's,
> look in the Hal chamberlins book , chapter digital oscillators,
> complete schematic, easy to controll, place a EPROM in front
> for tuning table if you wish, can easily do octature whatever,
> just phase shuffle the sinus prom by tapping of the counter at
> differen positions.

5 ICs for 16 bit sin/cos sounds good! I don't have the  book, though ...
 
> Use whatever DAC you need PCM56/54 are fairly cheap, less
> then 10euro in units. One NCO/ACCU does many oscillators.
> Pyshically larger then a DDS chip but has the great feature
> of not distrurbing JH's analog brain with digital numbers 
> and opcodes and instructions, assemblers,101001110101, etc! ;-)

8-)

JH.