I/O drivers: high speed, high voltage, ESD Protection, level shifting . Voltage Regulators:Charge-pump, linear, PWM, low voltage dropout Power Supplies: power amp, Low voltage / power analog design for battery powered systems . D/A Converters: current out, voltage out. A/D Converters: Flash, Sigma-Delta, folding-interpolating, Pipeline and low-power current-mode ADC. Switched Capacitor(SC), Switched Current(SI), OSC, and CDR. Specialized Analog: Ghz ADC, 24bits DAC, DLL, ADPLL, and MEMS. Process : CMOS, BiCMOS, DMOS, MOSFET, SiGe and Bipolar.