On Thu, 2 Jun 2016 21:40:09 -0700 (PDT), Phil Allison
wrote:

Don Pearce wrote:



The Mosfet is ideal for that too. I modelled that on LTSpice, and it
looks perfect. Smaller devices with about 60mOhm channel resistance
are ideal - they have very low gate/channel capacitance and very
little of the operating pulse gets through. My model used a 1k
resistance in series with the signal followed by the Mosfet to ground.


** Cleary you have NOT modelled a scheme that mutes switch-on noises OR noises that occur after switch off.

NOR have you worked out how to avoid clipping the audio signal at 0.6V negative.

Read the link I posted and shut up.

These are details of particular designs, not reasons to ignore
Mosfets. If you can't find a circuit location where the signal does
not exceed 0.6V, just use a pedestal voltage. None of this is hard.

d

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