[sdiy] Passive filters and impedances

[Mattias Rickardsson]

On 4 November 2015 at 22:16, Richie Burnett
<rburnett at richieburnett.co.uk> wrote:
>> Anyway - has this impedance scaling technique ever been used to full
>> extent in any ladder filters, using different capacitor values for all
>> stages?
>
> You mean used in diode or transistor ladders?  I suspect not, as usually all
> of the diodes or transistors operate at the same bias current, and would
> therefore exhibit *the same* incremental resistance.  Not a decade apart.

Perhaps double diodes could be used in series or parallel to get
double or half the resistance. Not a decade apart, but better than
nothing? :-)

/mr