[HBR] Re: GB> RSGB Keyer

[Chris Trask]

>
> It isn't a matter of comprehension. I comprehend what you wrote. It's
> just that what you wrote is incorrect. A multivibrator is two inverting
> gain stages with the output of each connected to the input of the other.
> A timer is not an MV (necessarily) nor is an MV a timer (necessarily).
> Even if the first stage were a timer[*], it is not a multivibrator.
>

    Your's thinking of a bistable multivibrator, which usually does require
two stages, each one being comparable to a one-shot multivibrator or timer
which trigger each other.

>
> I'm all for generalizing and seeing correspondences between different
> kinds of circuits for purposes of understanding their behavior in
> multiple ways, but I can't quite stretch a single stage like that
> into being a multivibrator.
>

    The term one-shot multivibrator" is often used in place of "timer", and
it does not require two stages.  A one-shot multivibrator uses an external
trigger, in this case the key.

Chris

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