[1] Natl Tsing Hua Univ, Hsinchu, Taiwan
[2] Medtron Microelectron, Tempe, AZ USA
[3] Natl Chung Hsing Univ, Taichung, Taiwan
[4] Univ Vienna, Vienna, Austria
[5] Univ Cambridge, Cambridge, England
[6] Hongik Univ, Seoul, South Korea
[7] Texas Instruments Inc, Dallas, TX USA
[8] Osaka Univ, Suita, Osaka, Japan
[9] Natl Tsing Hua Univ, Hsinchu, Taiwan
[10] Natl Chung Hsing Univ, Taichung, Taiwan
[11] Univ Vienna, A-1010 Vienna, Austria
[12] Univ Cambridge, Cambridge CB2 1TN, England
[13] Hongik Univ, Seoul, South Korea
[14] Texas Instruments Inc, Dallas, TX 75265 USA
[15] Osaka Univ, Suita, Osaka 565, Japan