[sdiy] 2 Diode ring modulator rough designs - request advice

[John L Marshall]

Aren't your "Y" input and output swapped?


Take care,
John
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Pacific Northwest DIY Synthesizer meeting, July 20, 2002
See: www.sound-photo.com
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----- Original Message ----- 
From: "Scott Gravenhorst" <music.maker at gte.net>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, July 20, 2002 11:55 AM
Subject: [sdiy] 2 Diode ring modulator rough designs - request advice


> http://home1.gte.net/res0658s/diode_ring_modulators.html
> 
> There are two rough designs here.  One uses transistor phase
> splitters, the other uses 4069 inverters in linear amp mode
> to achieve the required inverted and non inverted copies of
> the input signals.
> 
> What I see in the 4069 design is an issue with current flow
> through the diodes (and drive MOSFETs) on input X.  I am not
> terribly concerned about distortion.
> 
> Should I put small series current limit resistors to feed
> the X side of the ring?
> 
> In the discrete design, should I power this with a dual supply?
> 
> Any other comments regarding design flaws?
> 
> Opinions on which has a better chance of working at all?
> 
> 
> Thank you for your time.
> 
> 
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> -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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>