Samsung Electro-mechanics Co., Ltd.

Korea Atomic Energy Research Institute

Jeong Ho Moon

Chang Seok Lee

Kwang Du Lee

Yu Sin Kim

Chang Soo Yang

Sang Gyu Park

Moo Il Jeong

Seong Hee Park

Young Uk Jeong

Ki Tae Lee

Nikolay Vinokurov

Kyuha Jang

Shang In Shin

No Chul Myung

A variable-period permanent-magnet undulator which is applicable not only to a planar undulator but also to a helical undulator, in which permanent-magnets and ferromagnetic substances are alternately arranged, and the ferromagnetic substance interposed between the permanent-magnets is saturated to thus enable the magnets to be effectively spaced apart from each other by the repulsive force between the permanent-magnets, thereby adjusting the period of the magnetic field in an easy and precise manner.

Variable-cycle permanent-magnet undulator

Provided is a device for generating a chaotic signal comprising a PN signal generator that is composed of a digital logic circuit and generates a digital pseudo random signal with a predetermined frequency; a voltage control that generates a clock signal with a predetermined frequency; a mixer that mixes the pseudo random signal and the clock signal so as to generate a chaotic signal to output; and a band-pass filter that filters the chaotic signal, output from the mixer, into a chaotic signal of a desired band and then outputs the filtered signal.

Device and method for generating chaotic signal

A current mode logic (CML)-CMOS converter comprises an input stage that is turned on/off by receiving an input voltage from the outside; a voltage control unit that outputs a constant voltage; a first switching unit that is connected to the input stage and the voltage control unit and is turned on/off by the constant voltage applied from the voltage control unit; and a second switching unit that is connected to the input stage and is turned on/off by a signal applied from the input stage.

Current mode logic-CMOS converter

Growing community of inventors

Daejeon, South Korea

Jeong Ho Moon