2.3 C-V graph
The measured MOS capacitance (called gate capacitance) varies with the applied gate voltage.
① Measurement of C-V characteristics
-Apply any DC bias, and superimpose a small (15 mV) ac signal
-Generally measured at 1 MHz (high frequency) or at variable frequencies between 1KHz to 1 MHz
-The dc bias VG is slowly varied to get quasi-continuous C-V characteristics
② C-V chara
of a thin polystyrene film recorded with a modern IR spectrophotometer.
IR-spectra는 분자의 진동에 기인하며, 나타나는 peak는 조화진동에 의한 normal band, 비조화 진동에 의한 overtone band 그리고 인접원자단에 의한 combination band 등 다양한 peak이 관찰된다.
기본진동에는 Fig. 2에 나타낸 바와 같이 신축진동과 굽힙진동이
of the sanitary product is about 2.3 billion, which makes a market of around 300 billion won. Similarly, according to another research conducted by the South Korean National Statics office research in 2002, sanitary product market is around 360 billion won which is a very big market; toothpaste, one of the crucial necessities, market is around 175 billion . The main firms in the Korean sanitary
◎ 실험 방법
가. Resonant Frequencies of a Tude (개관, 폐관)
(1) 공명관, oscilloscope, function generator를 아래의 그림1과 같이 설치한다.
(2) 컴퓨터상의 단축키를 이용해서 음파의 주파수를 서서히 증가시켜가면서 관에서 나는 소리를 주의 깊게 듣는다.
(3) function generator로 출력되는 파형의 진폭을 0.2 - 0.5(Volt) 정
Frequency of buying patterns
Tourist will not be visiting frequently because they are tourists and they will be willing to try various kinds of food. It is unlikely for them to go the same cuisine. Foreigners living in Korea and busy office workers will be the main target for this company. With the adequate and delectable food, we will intrigue them to come to at least once in every two days. M