Please use this identifier to cite or link to this item:
|Title:||Electromechanical-filter-based bandpass sigma-delta modulator|
|Keywords:||Analog-to-digital converter (ADC)|
Microelectromechanical system (MEMS) filter
Surface acoustic wave (SAW) filter
|Source:||Yu, R., Xu, Y.-P. (2009). Electromechanical-filter-based bandpass sigma-delta modulator. IEEE Transactions on Circuits and Systems II: Express Briefs 56 (7) : 550-554. ScholarBank@NUS Repository. https://doi.org/10.1109/TCSII.2009.2022211|
|Abstract:||This brief proposes an electromechanical-filter-based continuous-time (CT) bandpass (BP) sigma-delta modulator for wideband digitization at high intermediate frequency (< 70 MHz). Both the mechanically coupled microelectromechanical system and the longitudinally coupled surface acoustic wave (SAW) filters can be employed as loop filters. The advantages of the electromechanical filter are its low power consumption and accurate center frequency without the need for tuning. As a proof of concept, a fourth-order BP sigma-delta modulator is demonstrated with a 110-MHz SAW filter. Realized in a 0.35-μm SiGe heterojunction-bipolar-transistor bipolar complimentary metal-oxide-semiconductor technology, the prototype chip is clocked at 440 MHz and achieves 65-dB DR and 60-dB SNDR over 1 MHz, as well as 58-dB DR and 53-dB SNDR over the 3.84-MHz signal band. The total power consumption is 57 mW under a 3-V supply. © 2009 IEEE.|
|Source Title:||IEEE Transactions on Circuits and Systems II: Express Briefs|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Dec 10, 2017
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.