Abstract- This paper presents an X-band voltagecontrolled
hairpin resonator oscillator using GaAs
MESFET varactor. To get wide tuning range, the
hairpin resonator is combined with the MESFET
varactor. It is incorporated into the series feedback
oscillator. The measurement of the oscillator
showed the frequency tuning range of 11.15 MHz
with the output power flatness less than 0.10 dB at
t
curve shift toward applied voltage because the movement of charges is determined by applied voltage(-,+). It is known that mobile charges are generated when dielectric material has the impurities such as Na ion.
The term fast interface state refers to the fact that these defects can change their charge state relatively fast in response to changes of the gate bias. As the surface potential in a
4. Equipment
4.1 RCA cleaning
RCA cleaning is a series of rinsing procedure prior to experiment with Si wafer. The purpose of the RCA clean is to remove organic contaminants (such as dust particles, grease or silica gel) from the wafer surface. There are three steps to be performed. The first step is to remove organic contaminant from surface of wafer. Second step is to remove any oxide layer
Terminal block
PC와 결합된 DAQ 모듈과 터미널 블록을 통해, AVR 보드와 기타 픽업 등을 연결한다. DAQ에 cording을 넣어서, 컨트롤러가 되도록 제어한다.
# AVR board
이 튜닝 시스템에서의 서브 제어 루틴으로써, DAQ에서 fin과 fout과의 비교 및 제어가 있기 전에, AVR이 모터 컨트롤에 대한 피드백을 자체적으로
1. Introduction
1) Definition of preservation and food-spoilage micro-organisms
Food preservation is the process of treating and handling food to stop or greatly slow down spoilage (loss of quality, edibility or nutritive value) caused or accelerated by micro-organisms. Some methods, however, use benign bacteria, yeasts or fungi to add specific qualities and to preserve food (e.g., cheese, wine