newbie diode/rectification ?s

[Ken Stone]

It sounds like you are charging up the decoupling capacitor at the input of
your amp (whatever you are feeding ther diode TO). Simple solution is to
connect a resistor (say 10k) from the amp input to ground, assuming you have
the cathode (striped end) of the diode facing the amp.

Ken

>hello all,
>
>i had a notion over the weekend of using a diode in-line w/ my synth output
>to remove one half (< 0V) of the signal.  basically, i'm wanting to
>experiment w/ asymmetrical waveforms.  so, i'm trying to turn:
>\   |\   |\   |\   |
>_\__|_\__|_\__|_\__|
>  \ |  \ |  \ |  \ |
>   \|   \|   \|   \|
>
>into:
>\   |\   |\   |\   |
>_\__|_\__|_\__|_\__|
>
>i was able to get this to happen, but w/ some side effects that i don't
>understand:
>
>- the signal magnitude after the diode is initially connected is half that
>of the input as expected.  gradually however, over a period of ~15 seconds,
>it *attenuates* down to less than 1/8 of the input. 
>
>- diode orientation is significant.  depending on the phase of the signal,
>one of the orientations seems to attenuate down to almost nothing.
>
>can anyone enlighten me here?  and, is there a better way to achieve what
>i'm trying to accomplish.
>
>thanks very much in advance,
>dan
>
>ps- the signal originates from an Oberheim Matrix-12, which has a 4051
>demux feeding either a 10k resistor to the individual voice out, or a pair
>of TL072s in series to the mix out.  the behaviors appear in both
>configurations.
>___
>dan mcmullen, sf, ca, usa                  don't worry - pay attention
>mailto:dog at well.com                                       415.681-0712
>pgp fingerprint  =  1C70 8D81 6B94 93A9 F2D8  9609 2122 BF70 8619 EDAF
>
>
_____________________________________________________________

                Ken Stone  sasami at blaze.net.au
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               <http://www.anime.net/~kens/>
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