Abstract
Chopping is a commonly used technique to eliminate flicker noise in amplifiers. We investigate the use of chopping in the input integrator of a continuous-time oversampling ( $\Delta \!\Sigma $ ) converter. Unlike an amplifier, the integrator in a continuous-time delta-sigma modulator is subject to out-of-band signals that are several orders of magnitude higher than the (desired) in-band component. This necessitates a careful analysis of frequency translation effects in a chopped integrator. This paper treats the chopped integrator as a linear periodically time-varying system, and exploits the adjoint (inter-reciprocal) network concept to simplify the analysis of aliasing effects in such an integrator. Simulation results that confirm the theory are given.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Circuits and Systems I: Regular Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
