Y. Wang, D. Ye, L. Lyu, Y. Xiang, H. Min and C. -J. Richard Shi ,A 13.56MHz Wireless Power and Data Transfer Receiver Achieving 75.4% Effective-Power-Conversion Efficiency with 0.1% ASK Modulation Depth and 9.2mW Output Power, ISSCC, pp. 142-144, San Francisco, Feb. 2018