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Design >> Mixed-Signal Design >> question-2'th order feedforward DSM design..
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Message started by darrenxyz on Dec 18^th, 2007, 12:42am

Title: question-2'th order feedforward DSM design..
Post by darrenxyz on Dec 18^th, 2007, 12:42am

hi,
recently i simulate silva-steensgaard's wideband low distrotion delta-sigma topology
(understanding Delta-sigma data converters,ch3.4.2)
and find there exist input signal component at the first and second integrator output!
but it should not happend with this topology,
do somebody kindly who familiar with dsm can tell me what wrong with my simulation?

i put structure figure/simulation result/simulink file in silva-dsm.rar