Linearization of VCO-based ADCs using asynchronous sigma-delta modulation
2016 (English)Conference paper (Refereed)
Asynchronous sigma-delta modulation is investigated as an alternative linearization scheme for all-digital voltage controlled oscillator based analog-to-digital converters, which commonly require digital post processing to achieve good linearity. The modulator output, when used to drive a VCO-based converter, causes the oscillator to operate at two fixed frequencies thereby removing the VCO nonlinearity from the transfer function. A circuit is proposed consisting of a digital block and a passive RC circuit operating as an integrator. Spectre simulation of the design synthesized using a 65 nm standard cell library indicate that a harmonic suppression up to -60 dB is feasible.
Place, publisher, year, edition, pages
New York: Institute of Electrical and Electronics Engineers , 2016.
Other Electrical Engineering, Electronic Engineering, Information Engineering Control Engineering Signal Processing Computational Mathematics Mathematical Analysis
IdentifiersURN: urn:nbn:se:liu:diva-136115DOI: 10.1109/MWSCAS.2016.7870151OAI: oai:DiVA.org:liu-136115DiVA: diva2:1085123
2016 IEEE 59th International Midwest Symposium on : Circuits and Systems (MWSCAS), 16-19 October, 2016