[sdiy] Free SSM2044, SSM2056 chips for pickup and one question about single supply VCAs

[Mike Bryant]

And if you translate the control voltage to the -12V line you'll probably inject PSU noise as well.  Ground referencing is always best for control voltages if you can manage it.

________________________________


The reason is that the Iabc (the control current) is created with a
resistor from a voltage referenced to GND.

The OTAs sinks this current into the negative supply terminal.

If you'd run them from +-12V then you need extra circuitry to translate
the voltage.

(If you want to read a bit more on OTAs there is an article at my
homepage, link below.)


Best,

  René


--
synth at schmitzbits.de
http://schmitzbits.de

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