[sdiy] Simple VCA?

[Andre Majorel]

On 2008-04-13 21:28 +0100, Tim Stinchcombe wrote:

> > Does it look like this ASCIImatic:
> >
> >                                 FB ?
> >                        +------\/\/\/\---+
> >             510R       |                |
> >                        |  |\            |
> >     IN *--/\/\/\/---+--+--|-\           |
> >                     |     |  \          |
> >                     |     |   \         |   out
> >                   |-+     |    >--------+----->
> >                   |       |   /
> > cont *-/\/\/\/--->|-+     |  /
> >                     |  +--|+/
> >           ???       |  |  |/ 
> >                     +--+
> >                     |
> >                     |
> >                     /
> >                     \ 510R
> >                     /
> >                     \
> >                     /
> >                     |
> >                     |
> >                   GND
>
> Yep, that is as per the circuit in the Teledyne book: JFET is
> n-channel, is shown with no resistor on the gate, but has a '-'
> (minus) on it.

A minus on the gate ? What does that mean ?

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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