Mixed Jacks

Don Tillman don at till.com
Fri Sep 12 09:18:42 CEST 1997


   From: Martin Czech <martin.czech at itt-sc.de>
   Date: Fri, 12 Sep 1997 07:30:59 +0200 (MET DST)

   But I don't like the idea of multiple inputs to one output at all,
   because the outputs need some resistance for protection and stability,
   and the inputs should have no very high resistance, because the input
   summing amp needs extremely high impedance in this case. This would
   mean quite a load for the output and some voltage drop, which is
   undesirable e.g. in the case of frequency control voltage. I'd prefer
   low offset voltage buffers, with one input und , say, four outputs,
   each with it's own protection circuit.

It's the responsibility of the modular designer to handle this
situation in a reasonable way.  Ie., place the current limiting
resistor within the feedback loop.

  --- Don




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