Tri 2 Sin

[Paul Perry]

I must say I am enjoying all this thread.. makes up for a lot..

now I am not a mathematician.. but I feel intuitively that there must
exist (where is that backwards E when I need it?) a circuit
based around one or 2 multipliers that would produce a sine from
a triangle by an approximation method using a polynomial expansion..
back in the days of analog computers and hardware shortages, plenty of
tricks like this existed.
Certainly, it can be done using an exponential generator with a feedback
arrangement, although not by me. (Something like this was in the BurrBrown 
Non-Linear Handbook.)

paul perry melbourne australia