Re: LF: Simple image-cancelling exciter for digimodes

[Rik Strobbe <Rik.Strobbe@fys.kuleuven.ac.be>]

Wolf,

an easy way to get the 25% signals would be to use a Johnson counter 
(eg. CD4017).
73, Rik  ON7YD

Citeren Wolf DL4YHF <dl4yhf@freenet.de>:

> Hello Alberto,
>
> Thanks for the point - and Ok about the reversed Tayloe detector : In
>
> fact, the circuit -as it is- is already quite similar. One difference
> is 
> the duty cycle of the switching waveforms (if one would use a
> fourfold 
> analog switch like the HC4066) for the "Tayloe":
> For Tayloe switches, it would be 1 /  4 (each switch conducts 25 % of
>
> the whole cycle)
> For the classic image cancelling mixer, the duty cycle is 1 / 2 (50 %
>
> conduction in the cycle).
> Unfortunately the simple quadrature L.O. with two flipflops cannot be
>
> modified (without extra components) to produce the "Tayloe"-
> switching 
> waveforms.
> Best greetings,
> Wolf DL4YHF .