Band-pass Sigma-Delta Converter

jswon · 发表于 2008-1-13 12:48:01

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A 70 MHz CMOS Band-pass Sigma-Delta Analog-to-
Digital Converter for Wireless Receivers

香港科技大學的高手
Department of Electrical and Electronic Engineering
The Hong Kong University of Science and Technology

In this thesis, a technique to design the SD converters for 70 MHz will be described.
Impulse-invariant-transformation is used to transform a discrete-time (z-domain)
loop-filter transfer function into continuous-time (s-domain). The continuous-time
loop-filter is then implemented using a transconductor-capacitor filter. A latched-type
ii
comparator and a TSPC D Flip-flop are being used as the quantizer of the SD
converter. Two second-order band-pass SD converters have been implemented in
the TSMC technology