Microsynth XO "sub octave track and hold"

Started by igor12, June 29, 2012, 02:28:48 PM

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igor12

Can anybody explain the how the "sub octave track and hold modulator'  circuit works?  In the XO version, it looks like the CA3094 was replaced by PNP transistor and JEFT.  I don't even know the purpose of it.