公开(公告)号：KR100292246B1

公开(公告)日：2001-06-01

申请号：KR1019980006192

申请日：1998-02-26

Applicant: 국방과학연구소

Inventor： 윤난영 ,  김병혁 ,  이희철 ,  김충기

IPC: H03F3/343

Abstract: PURPOSE: A readout circuit of a detecting device using current mirror circuit is provided to constantly maintain bias voltage of the detecting device by adapting a unit cell circuit using current mirror circuit to the readout circuit of detecting device. CONSTITUTION: A readout circuit of a detecting device uses a current mirror circuit. The current mirror circuit consists of two NMOSFETs and two PMOSFETs. The PMOSFETs include a first PMOSFET(Mp1) for providing reference current and a second PMOSFET(Mp2) for providing same current as the fist PMOSFET. A gate terminal and a source terminal of the first one are respectively connected with a gate terminal and a source terminal of the second one. In the second one, a drain terminal is connected with the gate terminal. The NMOSFETs include a first NMOSFET(Mn1) for providing reference current and a second NMOSFET(Mn2) for providing same current as the fist NMOSFET. A gate terminal and a source terminal of the first NMOSFET are respectively connected with a gate terminal of the second one and negative terminal of photo-voltage type detecting device. In the second one, a drain terminal is connected with the gate terminal. To the source terminal of the second one is applied same voltage as bias voltage to be applied to the detecting device. The drain terminals of the first/second NMOSFETs are respectively connected with respective drain terminal of the second/first PMOSFETs. A capacitor is connected with the source terminals of the PMOSFETs.

公开(公告)号：KR1019990070997A

公开(公告)日：1999-09-15

申请号：KR1019980006192

申请日：1998-02-26

Applicant: 국방과학연구소

Inventor： 윤난영 ,  김병혁 ,  이희철 ,  김충기

IPC: H03F3/343

Abstract: 전류거울(current mirror)회로를 이용하는, 성능이 우수한 적외선 감지 소자의 신호취득(readout)회로를 제공한다.
본 발명에 의한 신호취득회로는 작은 면적만을 필요로 함으로써 감지소자의 고집적화를 가능하게 하며, 입력 임피던스가 작아서 높은 주입효율(high injection efficiency)을 얻을 수 있으며, 전력소모가 작고 높은 전하용량을 가진다는 장점이 있다. 또한 전류거울 회로를 사용함으로써 적외선 감지소자의 동작 바이어스 전압(bias voltage)을 안정화시킬 수 있으며, 이로 인하여 저잡음 특성의 회로를 얻을 수 있다.