Re: SX clocks generation (was: 6569 luminances)

On 2013-05-03, at 17:51, Segher Boessenkool wrote:

> [...]
> So you have these two clocks, 90 deg out of phase.  Those two are
> "digital" so far.  Then both of these signals and their complement
> are driven to four identical circuits.  Those circuits are first
> two low-pass filters (an opamp (well actually just two fets, i.e.
> an inverter) wired as integrator) and then capacitively coupled to
> another opamp (more interesting, four fets).  As end result you
> get four sine-like waves out, each 90 deg shifted to each other.
> These sines are combined in various ways to form the eight different
> chroma signals; the colour per pixel decides which to use (if any).
> Some colours have more of the phase that isn't flipped every line,
> and some have more of the phase that _is_ flipped.

Now, that's what they call an explanation. Thanks!

-- 
SD!

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