한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.1
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- Pages.581-584
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- 2003
계측증폭기를 이용한 자기임피던스센서의 구동회로
Driving circuit of magnetoimpedance sensor using Instrumentation amplifier
- Song, Jae-Yeon (Pukyong National Univ.) ;
- Kim, Young-Hak (Pukyong National Univ.) ;
- Shin, Kwang-Ho (Kyungsung Univ.)
- 발행 : 2003.07.10
초록
The phase differences and noise signals are in general serious on output of a instrumentation amplifier for signal conditioning of a sensor driven at high frequency due to a time-varying input signal. In this study, we get the better amplification and S/N ratio using the rectified signal for the input of instrumentation amplifier. This driving circuits were designed and constructed by OrCAD and laboratory PCB process. All of the elements used on the circuit including highly speedy OP-Amp. was SMD type and the MI sensor was fabricated by meander-patterned amorphous ribbon. The output sensitivity of this circuit was