Young-sik Lee

Zero voltage switching controller of resonance mode converter and electronic ballast using the same

Apparatus for treating substrates

Proportional solenoid valve control system

Voltage balancing circuit

Power supply circuit with load protection function

System for controlling automobile cooling fan

Method for decision of time delay by repeater in mobile communication network

Method and apparatus for determining position of mobile communication terminal

Power-transistor driving circuit for a single power source

System and method for safe taxi service