STF behaviour in a CT ???? modulator

摘要

In this paper we propose a topology for continuous time ???? modulators. Unlike the modulators presented until now, they exhibit no peaking in their signal transfer function. Instead it achieves a `flat?? STF with the desired anti-aliasing properties and with small internal nodes signal levels. Now, a simple filter, e.g. a first-order low-pass filter can precede the modulator to prevent out of band signals corrupting the correct operation of the modulator.