Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Low Drop Out Regulator with Ripple Cancelation Circuit

잡음 제거 회로를 이용한 LDO 레귤레이터

  • Kim, Chae-Won (Dept. of Electronics and Electrical Engineering, DanKook Unversity) ;
  • Kwon, Min-Ju (Dept. of Electronics and Electrical Engineering, DanKook Unversity) ;
  • Jung, Jun-Mo (Dept. of Electronics Engineering, Seokyeong Unversity)
  • Published : 2017.09.30
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Abstract

In this paper, A low dropout (LDO) regulator that improves the power supply rejection ratio by using a noise canceling circuit is proposed. The noise rejection circuit between the error amplifier and the pass transistor is designed to reduce the influence of the pass transistor on the noise coming from the voltage source. The LDO regulator has the same regulation characteristics as the conventional LDO regulator. The proposed circuit uses 0.18um process and Cadence's Virtuoso and Specter simulator.

본 논문에서는 잡음 제거 회로를 이용하여 공급 전원 제거 비를 향상시킨 LDO(Low drop-out) 레귤레이터를 제안하였다. LDO 레귤레이터 내부의 오차증폭기와 패스 트랜지스터 사이에 잡음 제거 회로를 두어 전압 라인에서 들어오는 노이즈에 패스 트랜지스터가 받는 영향을 줄일 수 있게 설계하였으며, 기존의 LDO 레귤레이터와 동일한 레귤레이션 특성을 갖도록 했다. 제안한 회로는 0.18um 공정을 사용하였고 Cadence의 Virtuoso, Spectre 시뮬레이터를 사용하였다.

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References

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