A Wideband 6th Order Programmable Bandpass DEM Implementation for a Nyquist DAC
2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS)(2020)
摘要
This paper presents a 6
th
order programmable bandpass dynamic-element-matching (DEM) that shapes the static mismatch error of a Nyquist DAC for any choice of center-frequency. The mismatch error can be shaped over a narrow or wide band, and up to 20% of F
s
depending on the target application. This work demonstrates that for a 12-bit Nyquist DAC (5T-7B), the lowest in-band SFDR and IMD3 is 88dB and 80dB respectively, for various configurations of the DEM. The DEM hardware is implemented onto a XILINX FPGA using the System-Generator for DSP™ tool with results obtained for 155MHz F
s
.
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关键词
Bandpass,DEM,Nyquist-DAC,programmable
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