                 Chien-Ming Wang 1 , Jiann-Jong Chen 2 , Dong-Shiuh Wu 1 1 Dep. Of Electronic Eng., Lunghwa University of Science and Technology 2 Dep. Of Electronic Eng., National Taipei University of Technology !" #                                                                        !    "           " #   $%&       ’()*’+, "                            "   "     -./(0  ’1 ’         "   "  ’()*’+, "           "  "    ./(  ’1 /     "             "          $"       %   &’  ( )&’# 1  "     ./(  ’1 )12342                "   $5 56&  "   "      "                     %      " %5Ω                 "  "   "       "      "    "    "  $67&        56     "       8 9 65Ω   7   :5Ω       RTN Rq 10 U1 UC3843 2 3 4 8 1 6 7 5 VFB ISEN RT/CT VREF COMP OUT VCC GND Vin D SR560 Rf 2.47K RS 0.1 Ra 50K Ct 4.7n Vout L 50u Rt 7.5K RTN CO 100u Rb 10K C2 1n Cf 0.088u C1 0.1u R1 1K M1 1010E ; < # "      )12342   