At 09:37 PM 3/26/2006, you wrote:
>As the frequency increases the control signal I.E. address inputs
>could couple to the output showing up as additional noise. ??? gfz
My understanding is that the control signals begin to show up on the
outputs IF the turn off delay is too short and that the switch
designers intentionally inhibit the off transition in order to avoid this.
The side effect of allowing a fast transition to the off state is
that the control signal artifacts would appear on the output
terminals, which would create a nasty thump every time the switch
opened. No one wants this...not even the customers that use these
switches for less demanding purposes.
Also, keep in mind that the control signals amplitude is
(potentially) in the multi-volt range, so these artifacts MUST be
extinguished, especially for us users that switch microvolt levels.
The control signal artifacts are not just a matter of noise, allowing
even the smallest leakage levels would destroy the functionality of
the switch, especially at our signal levels.
Regards,
Art
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