vroy_92
Junior Member
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Posts: 30
Leuven, Belgium
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Lets say you your VCO is driving an inverter. When the output of the inverter is switching, through the Cgd cap, it will couple back to the input. The similar thing is happening to your case as well. You cannot reproduce this by driving an inverter with an ideal pulse voltage source. You need to connect a source resistance in series. You can think of connecting an isolating inverter between the inverters in your ring and the TSPC divider.
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