16 Aug
2004
16 Aug
'04
1:41 p.m.
On Mon, Aug 16, 2004 at 04:49:47PM +0200, Stanley Jaddoe wrote:
I did some SPICE emulation (Alfons: I know, I'm
not a (real) engineer) and I
never saw a tangentfunction-like output...
The formula I posted does not contain a tangent, but an *hyperbolic* tangent.
Assuming one input and one output, (instead of the
shown three inputs in my
first post), if the input signal is a triangle wave, I should get a (not
perfect) sine wave.
It _that_ is the purpose of the circuit, there is an even simpler and better way:
Let x(t) be a triangle wave between -1 and +1, then
y = x * (2 - x) if x >= 0
y = x * (2 + x) otherwise
will give you a very decent sine wave.
--
FA