Abstract
A 2–1–1 cascaded continuous-time ΔΣ modulator (DSM) is self-calibrated with LMS-based adaptation. Its noise cancellation filter (NCF) is derived using a parameter-based continuous-time (CT) to discrete-time (DT) transform. These techniques reduce the quantization noise leakage due to the mismatch between analog modulator and digital NCF. A 0.18-µm CMOS prototype operating at 360MHz with a 1-V pp full-scale demonstrates a leakage noise spectral density below 10nV/√Hz over a 30-MHz bandwidth after the capacitors in the Gm-C loop filters are self-trimmed with a 1.1% step. This level of noise leakage is well below the noise floor of most CT DSM designs.
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 callDisclaimer: 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.
