1. D. Blaauw, D. Sylvester, M. Choi, I. Lee, and T. Jang, “Ultra low power temperature insensitive current source with line and load regulation,” U.S., grant (US 9,639,107 B2, May. 2, 2017)
  2. I. Lee, Y. Lee, D. Sylvester, and D. Blaauw, “Electronic device with supervisor circuit for detecting resistance parameter of an energy storage device,” U.S., grant (US 9,429,627 B2, Aug. 30, 2016).
  3. G. Han, Y. Chae, I. Lee, D. Lee, S. Lim, J. Cheon, “Switched capacitor circuit,” Korea, Registered (101087246, Nov. 21. 2011).
  4. G. Han, I. Lee, Y. Chae “Inverter and inverter based system,” Korea, Registered (101069377, Sep. 26. 2011).
  5. I. Lee, Y. Chae, G. Han, Korea, “Hysteretic analog to digital converter,” Korea, Registered (10093385, Dec. 15. 2009).
  6. Y. Chae, I. Lee, G. Han, “Cardiac pacemaker and method of co-using amplifier using the same,” Korea, Registered (100933281, Dec. 14. 2009).
  7. Y. Chae, I. Lee, M. Kwon, G. Han, “Time-interleaved sigma-delta modulator using single amplifier architecture,” Korea, Registered (100933280, Dec. 14. 2009).
  8. Y. Chae, I. Lee, J. Choen, G. Han, S.Ham, “Decimation filter, analog to digital converter including the same, and image sensors including the converters,” U.S., grant (US 8,233,068 B2, Jul. 31, 2012).
  9. Y. Chae, I. Lee, G.Han, S. Ham, “Sigma-delta analog to digital converters and solid state image pickup device,” U.S., grant (US 7,773,018 B2, Aug. 10, 2010).
  10. Y. Chae, I. Lee, J. Choen, G. Han, S. Ham, “Apparatus and method for sigma-delta analog to digital conversion,” U.S., grant (US 7,916,061 B2, Mar. 29. 2011).