求一篇关于high-order sigma-delta modulator的thesis

Wai Laing Lee, “A Novel Higher Order Interpolative Modulator Topology for High Resolution Oversampling A/D Converters”, MIT Masters Thesis, June 1987
搜了好久都没找到，麻烦大侠们帮帮忙，感谢不尽!
Email:kevinmetech@gmail.com

Wai Laing Lee, “A Novel Higher Order Interpolative Modulator Topology for High Resolution Oversampling A/D Converters”, MIT Masters Thesis, June 1987
Enjoy it!

 waileeThesis.pdf