TY - GEN
T1 - On the use of passive circuits to implement LC-based band-pass CT ΣΔ modulators
AU - Salgado, Gerardo Molina
AU - Dolecek, Gordana Jovanovic
AU - De La Rosa, Jose M.
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/9/28
Y1 - 2015/9/28
N2 - This paper discusses the use of passive circuits for the implementation of band-pass continuous-time ΣΔ modulators intended for digitizing radio-frequency signals in wireless communication systems. Several alternative loop filters, considering either a fully passive or an hybrid active/passive circuit realization of the embedded resonators, are applied to the high-level design of fourth-order single-loop band-pass ΣΔ modulators with current-mode feedback digital-to-analog converter. The resulted modulator topologies are synthesized considering a widely programmable notch frequency, and compared in terms of their sensitivity to main circuit error mechanisms, including finite output swing, quality factor of inductors, and technology process variations. Time-domain simulations validate the presented approach, showing the feasibility of using fully passive and hybrid active/passive resonators to implement band-pass continuous-time ΣΔ analog-to-digital converters1.
AB - This paper discusses the use of passive circuits for the implementation of band-pass continuous-time ΣΔ modulators intended for digitizing radio-frequency signals in wireless communication systems. Several alternative loop filters, considering either a fully passive or an hybrid active/passive circuit realization of the embedded resonators, are applied to the high-level design of fourth-order single-loop band-pass ΣΔ modulators with current-mode feedback digital-to-analog converter. The resulted modulator topologies are synthesized considering a widely programmable notch frequency, and compared in terms of their sensitivity to main circuit error mechanisms, including finite output swing, quality factor of inductors, and technology process variations. Time-domain simulations validate the presented approach, showing the feasibility of using fully passive and hybrid active/passive resonators to implement band-pass continuous-time ΣΔ analog-to-digital converters1.
UR - https://www.scopus.com/pages/publications/84962129157
U2 - 10.1109/MWSCAS.2015.7282024
DO - 10.1109/MWSCAS.2015.7282024
M3 - Conference proceeding
AN - SCOPUS:84962129157
T3 - Midwest Symposium on Circuits and Systems
BT - IEEE 58th International Midwest Symposium on Circuits and Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015
Y2 - 2 August 2015 through 5 August 2015
ER -