Klon : Feed forward ? Or positive feedback ?

Started by Vivek, November 21, 2020, 02:58:52 PM

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Vivek



Does a Klon have "feed forward networks"

Or are they really "positive feedback networks" ?

EBK

Feed forward.  That OUT node goes to a virtual-ground current summing node in the next stage.
  • SUPPORTER
Technical difficulties.  Please stand by.

iainpunk

they are mainly feed forward, due to the difference in transfer function of the two paths.
i recommend modeling the feed forward paths in reverse, you'll see that they aren't really that effective as feedback, be it positive or negative.
heavily simplified:
the upper path has r16+r19 47k+15k in to 1uf, that gives a low pass cutoff at 2.6Hz
the bottom path has R15 R16 R17 R18 in its way and R8 to ground, this creates a resistive divider of at least -20dB, and that is ignoring the capacitors.

also, the ''in'' point should be considered a near 0 ohm to Vbias when you use superposition to determine the alleged feedback paths.

cheers, Iain
friendly reminder: all holes are positive and have negative weight, despite not being there.

cheers