Details
| Original language | English |
|---|---|
| Pages (from-to) | 28-37 |
| Number of pages | 10 |
| Journal | Proceedings of SPIE-The International Society for Optical Engineering |
| Volume | 4290 |
| Publication status | Published - 2001 |
| Externally published | Yes |
Abstract
A new method to compensate for the column multiplexer (MUX) in photo detector arrays is described and analyzed. It is based on a transimpedance amplifier with improved feedback structure. The focus is on arrays where the photo current is directly used as signal. If this current is transferred to the global transimpedance amplifier by a multiplexer, the resistance of the MUX transistor causes a significant speed degradation. Measurements of a test chip in 0.18μm CMOS are presented. It turns out that using the proposed circuit it is possible to almost fully compensate for the MUX in terms of speed and signal amplitude with only little layout area penalty.
Keywords
- CMOS camera, MOS transistor switch, Multiplexer, Multiplexer resistance, Optical receiver, Passive pixel, Transimpedance amplifier
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
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In: Proceedings of SPIE-The International Society for Optical Engineering, Vol. 4290, 2001, p. 28-37.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Speeding up CMOS cameras and optical receivers by improved column multiplexer
AU - Wicht, Bernhard
AU - Martiny, Ingo
AU - Schmitt-Landsiedel, Doris
AU - Paul, Steffen
AU - Sanders, Anthony
PY - 2001
Y1 - 2001
N2 - A new method to compensate for the column multiplexer (MUX) in photo detector arrays is described and analyzed. It is based on a transimpedance amplifier with improved feedback structure. The focus is on arrays where the photo current is directly used as signal. If this current is transferred to the global transimpedance amplifier by a multiplexer, the resistance of the MUX transistor causes a significant speed degradation. Measurements of a test chip in 0.18μm CMOS are presented. It turns out that using the proposed circuit it is possible to almost fully compensate for the MUX in terms of speed and signal amplitude with only little layout area penalty.
AB - A new method to compensate for the column multiplexer (MUX) in photo detector arrays is described and analyzed. It is based on a transimpedance amplifier with improved feedback structure. The focus is on arrays where the photo current is directly used as signal. If this current is transferred to the global transimpedance amplifier by a multiplexer, the resistance of the MUX transistor causes a significant speed degradation. Measurements of a test chip in 0.18μm CMOS are presented. It turns out that using the proposed circuit it is possible to almost fully compensate for the MUX in terms of speed and signal amplitude with only little layout area penalty.
KW - CMOS camera
KW - MOS transistor switch
KW - Multiplexer
KW - Multiplexer resistance
KW - Optical receiver
KW - Passive pixel
KW - Transimpedance amplifier
UR - http://www.scopus.com/inward/record.url?scp=0034929742&partnerID=8YFLogxK
U2 - 10.1117/12.426916
DO - 10.1117/12.426916
M3 - Article
AN - SCOPUS:0034929742
VL - 4290
SP - 28
EP - 37
JO - Proceedings of SPIE-The International Society for Optical Engineering
JF - Proceedings of SPIE-The International Society for Optical Engineering
SN - 0277-786X
ER -