Abstract
A detailed comparison between four types of pixels, based on a CMOS active column sensor (ACS) output chain technique is presented. A test chip of 64×64 pixels consisting of four 16×64 arrays, each with a different output chain, has been implemented in 0.35μm CMOS technology available through MOSIS and operated via a 3.3V supply. The chip includes four different amplifier/pixel combinations: (a) an n-channel based voltage amplifier with an n-channel reset transistor, (b) an n-channel based voltage amplifier with a p-channel reset transistor, (c) a p-channel based voltage amplifier with an n-channel reset transistor, (d) a p-channel based current mirror with an n-channel reset transistor. Pixel and output chain architectures are discussed, their operation is explained, simulations results are presented and measurements from a test chip are reported.
| Original language | English |
|---|---|
| Pages (from-to) | 304-311 |
| Number of pages | 8 |
| Journal | Sensors and Actuators, A: Physical |
| Volume | 116 |
| Issue number | 2 |
| DOIs | |
| State | Published - 15 Oct 2004 |
Keywords
- Active column sensor
- Active pixel sensor
- CMOS imagers
- Output chain
- Unity gain amplifier
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
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