KR0122296Y1 - Output amplifier of charge coupled device - Google Patents
Output amplifier of charge coupled deviceInfo
- Publication number
- KR0122296Y1 KR0122296Y1 KR2019910000470U KR910000470U KR0122296Y1 KR 0122296 Y1 KR0122296 Y1 KR 0122296Y1 KR 2019910000470 U KR2019910000470 U KR 2019910000470U KR 910000470 U KR910000470 U KR 910000470U KR 0122296 Y1 KR0122296 Y1 KR 0122296Y1
- Authority
- KR
- South Korea
- Prior art keywords
- amplifier
- output amplifier
- ccd
- input signal
- coupled device
- Prior art date
Links
- 238000003384 imaging method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004448 titration Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/148—Charge coupled imagers
- H01L27/14887—Blooming suppression
Abstract
본 고안은 CCD의 출력 증폭기에 관한 것으로 특히 CCD의 한 추세인 저조도 이미징에 적당하도록 한 CCD의 출력 증폭기에 관한 것으로서 종래 CCD 출력 증폭기에서의 단점 즉 앰프의 특성이 미리 정해지므로 입력 라이트(light)의 다이나믹 레인지가 좁아져 즉 조명 조건에 제한을 받아 응용의 폭이 좁아지게 되는 단점을 해결하기위해 출력 증폭기를 큰 입력 신호용 앰프와 저조도의 작은 신호용 앰프로 이원화하여 구성한 CCD출력 증폭기에 관한 것으로서 어떤 조명 조건에서도 적정의 수행을 행할 수 있는 효과가 있다.The present invention relates to an output amplifier of a CCD, and more particularly, to an output amplifier of a CCD suitable for low light imaging, which is one of the trends of a CCD, and a disadvantage of the conventional CCD output amplifier, that is, the characteristics of the amplifier are predetermined. In order to solve the disadvantage that the dynamic range is narrowed, i.e., the limitation of the lighting conditions, the width of the application is narrowed. There is also an effect that can perform the titration.
Description
제1도는 종래의 씨씨디(CCD)출력 증폭기 구성도1 is a block diagram of a conventional CDD output amplifier
제2도는 제1도에서 씨씨디출력 증폭기의 상세도2 is a detailed view of the CD output amplifier in FIG.
제3도는 본 고안에 따른 씨씨디의 출력 증폭기 구성도3 is a configuration diagram of the output amplifier of the CD according to the present invention
제4도는 본 제3도에서 씨씨디출력 증폭기의 상세도4 is a detailed view of the CD output amplifier shown in FIG.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
1 : 패널 어레이 1a : 포토 다이오드1: Panel Array 1a: Photodiode
1b : 수직 시프트 레지스터부 2 : 수평 시프트 레지스터부(HCCD)1b: vertical shift register portion 2: horizontal shift register portion (HCCD)
3, 4, 5 : 증폭기 6 : 오버플로우셀3, 4, 5: amplifier 6: overflow cell
본 고안은 전하 결합 소자(Charge Coupled Device)의 출력 증폭기에 관한 것으로, 특히 저조도 이미징(Imaging)에 적당하도록 출력 증폭기를 고조도의 큰입력신호용 증폭기와 저조도의 작은 입력신호용 증폭기로 2원화하여 구성한 씨씨디(CCD)의 출력 증폭기에 관한 것이다.The present invention relates to an output amplifier of a charge coupled device, and in particular, the CC is formed by dualizing the output amplifier into a high-intensity large input signal amplifier and a low-intensity small input signal amplifier suitable for low light imaging. The output amplifier of the CCD (CCD).
일반적인 인터-라인 트랜스퍼(Inter-Line Transfer)씨씨디는 제1도에서와 같이 크게 3파트로 구성된다.A typical Inter-Line Transfer CD has three parts, as shown in FIG.
즉, 픽셀 어레이부(Pixel Array)(1)(1픽셀은 1포토다이오드와 버티칼클락(Vertical Clock)2개로 이루어진다.)와, 수평 시프트 레지스터부(HCCD)(2)와 출력 증폭부(3)로 구성된다. 이때, 출력증폭부(3)는 제2도에 도시된 바와 같이 엔모스 트랜지스터(3a∼3d)로 구성된다.That is, a pixel array 1 (1 pixel consists of 1 photodiode and 2 vertical clocks), a horizontal shift register (HCCD) 2 and an output amplifier 3 It consists of. At this time, the output amplifier 3 is composed of NMOS transistors 3a to 3d as shown in FIG.
그런데 상기와 같은 싱글앰프 시스템에서는 증폭기의 특성(게인(gain), 노이즈(noise) 특성 등등)이 미리 정해 지므로 입력라이트(input light)의 다이나믹레인지(dynamic range)가 좁아져 즉, 조명조건에 제한을 받기 때문에 응용의 폭도 좁아지게 되는 단점이 있었다.However, in the single amplifier system as described above, the characteristics (gain, noise, etc.) of the amplifier are predetermined, so the dynamic range of the input light is narrowed, that is, limited to the lighting conditions. There was a drawback that the width of the application is also narrowed.
본 고안은 이러한 종래의 단점을 해결하기 위해 출력증폭기를 고조도의 큰 입력신호용 증폭기와 저조도의 작은 입력신호용 증폭기로 이원화하여, 조명의 응용폭을 향상시킬수 있게 씨씨디의 출력 증폭기를 안출한 것으로, 이를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.In order to solve the above disadvantages, the present invention dualizes an output amplifier into a high-intensity large input signal amplifier and a low-intensity small input signal amplifier, and the CD output amplifier is designed to improve the application range of lighting. This will be described in detail with reference to the accompanying drawings.
제3도는 본 고안에 따른 씨씨디의 출력 증폭기 구성도로서, 이에 도시한 바와 같이 픽셀어레이(1)와 수직 시프트레지스터부(VCCD)(1b) 및 구동클럭(ΦV1∼ΦV4)과, 수평 시프트레지스터부(HCCD)(2) 및 구동클럭(ΦH2,∼ΦH1), 그리고 고조도의 큰 입력신호용 제1증폭기(4)(RFGA : Resettable Floating Gata Amp)와, 저조도의 작은 입력신호용 제2증폭기(5)(FGA : Floating Gate Amp) 및 오버플로우셀(6)로 구성된다.3 is a configuration diagram of the output amplifier of the CD according to the present invention, and as shown therein, the pixel array 1, the vertical shift register (VCCD) 1b, the drive clocks ΦV1 to ΦV4, and the horizontal shift register. HCCD (2) and drive clocks (ΦH2, ΦH1), first amplifier for high input signal (4) (RFGA: Resettable Floating Gata Amp), and low amplifier for second input signal (5) (FGA: Floating Gate Amp) and overflow cell (6).
상기에서 제1, 제2 증폭기(4, 5)는 제4도에서와 같이 엔모오스 트랜지스터로 구성되는데, 고조도의 큰 입력신호용 제1증폭기(4)(RFGA)는 조절가능한 소오스 전압을 가지므로 어느 원하는 입력 챠지레벨(input charge level)에서 콘트라스트 인헨스먼트(contrast enhancement)를 최대화 하는 전압들을 셋-업 할 수 있다.In the above, the first and second amplifiers 4 and 5 are constituted by an EnMOS transistor as shown in FIG. 4, and the first amplifier 4 (RFGA) for the large input signal of high illumination has an adjustable source voltage. It is possible to set up voltages that maximize contrast enhancement at any desired input charge level.
또한 저조도의 작은 입력 신호용 제2증폭기(5)(FGA)는 씨씨디(CCD)채널에서의 챠지 센싱 및 센스 에프이티(FET)구동을 하며, 전압 증폭을 직접적으로 영향을 미치는 캐패시턴스를 최소화 하기 위하여 좁은 채널을 사용한다.In addition, the second amplifier 5 (FGA) for low-intensity small input signals performs charge sensing and sense FET driving in the CD channel and minimizes the capacitance that directly affects voltage amplification. Use narrow channels.
그리고, 이때 두 제1, 제2 증폭기(4, 5)사이에 오버 플로우셀(6)을 두어, 센스앰프에서 오버 플로우잉 및 이미징 블루밍을 방지한다.In this case, an overflow cell 6 is disposed between the two first and second amplifiers 4 and 5 to prevent overflow and imaging blooming in the sense amplifier.
따라서, 본 고안은 넓은 입력 다이나믹 레인지에 대응하기 위해 다른 게인과 노이즈 특성을 갖는 두출력 신호를 듀엘 앰프 시스템을 이용함으로써 어떤 조명 조건에서도 적정의 이미징(Imaging)을 수행할 수 있는 효과가 있다.Therefore, the present invention has an effect of performing proper imaging in any lighting condition by using a dual amplifier system for two output signals having different gains and noise characteristics to cope with a wide input dynamic range.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910000470U KR0122296Y1 (en) | 1991-01-14 | 1991-01-14 | Output amplifier of charge coupled device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910000470U KR0122296Y1 (en) | 1991-01-14 | 1991-01-14 | Output amplifier of charge coupled device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR920015998U KR920015998U (en) | 1992-08-17 |
| KR0122296Y1 true KR0122296Y1 (en) | 1998-07-15 |
Family
ID=19309750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910000470U KR0122296Y1 (en) | 1991-01-14 | 1991-01-14 | Output amplifier of charge coupled device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0122296Y1 (en) |
-
1991
- 1991-01-14 KR KR2019910000470U patent/KR0122296Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR920015998U (en) | 1992-08-17 |
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