[sdiy] EDN: Shift-register based Quadrature oscillator

[Harry Bissell Jr]

> Sine waves with fixed phase relationships find
> application in communications equipment,
> instrumentation, and power sources. Although you can
> use any of several traditional analog techniques to
> generate basic sine-wave signals, this Design Idea
> offers a simple method that uses only digital logic
> and fixed-value resistors...-- EDN, 4/13/2006 

and cannot change frequency unless you vary the RC
time constant.  And it is guaranteed that if you vary
the frequency 1000:1 (like we usually does) you will
need a tracking VCF ... now where did that 'digital
logic'
go now ???

(I think the one on Rene's site is much better...
especially better than I one I published last year :^)

otoh God bless the guy, he got $150 from them

H^) harry