Solum Co., Ltd.

National It Industry Promotion Agency

Hyun Ku Kang

Seung Kon Kong

Jung Eui Park

Dae Hoon Han

Man Dong Lee

A power converter may include an inductor, a switch turned on or turned off according to a control signal to control the flow of a current flowing through the inductor, and a control unit for outputting the control signal to turn on or turn off the switch by integrating a current flowing through the switch to compare the integrated current with the size of a preset reference voltage. The power converter and a driving method for the same may reduce errors of current control and have a simple structure.

Power converter and driving method for the same

Provided are an electronic document repository system which guarantees authenticity of electronic document and issues certificates and methods of registering, reading, issuing, and transferring electronic documents in the system, and a method of issuing certificates in the system. The electronic document repository system includes an authentication module, a registration module, a reading module, an issuing module, and a certification module.

System of electronic document repository which guarantees authenticity of the electronic document and issues certificates and method of registering, reading, issuing, transferring, a certificate issuing performed in the system

Growing community of inventors

Seoul, South Korea

Hyun Ku Kang