A CMOS-Based ISFET Chemical Imager With Auto-Calibration Capability

A signal processing ASIC for ISFET-based chemical sensors

With the advantages of small size, reliability, rapid response, compatibility to standard CMOS technology and on-chip signal processing, Ion-Sensitive Field Effect Transistor (ISFET)-based transducers are increasingly being applied in physiological data acquisition and environment monitoring. This paper presents a signal processing Application Specific Integrated Circuit (ASIC) and a discrete t...

Pulsed bipolar CMOS imager

This paper will describe an active pixel CMOS-compatible imager aimed at high resolution still cameras. We will discuss pixel operation, column sense circuits, serial output, and show results from existing imagers. In this abstract, we show results from a prototype 640x480 imager with 5.9x5.9 μm2 pixels built in 0.8 μm double-poly CMOS with one additional base implant. Active Capacitor-coupled ...

A CMOS Imager for DNA Detection

DNA Microarrays are used to analyse the DNA sequence of an organism. They are used to determine the activation levels of DNA sections within the entire DNA sequence. These microarrays consist of many spots, one for each DNA section, that give off light in proportion to the activation level of that DNA section. Microarray scanning equipment is used to determine light intensity at each of the spo...

CMOS-based chemical microsensors.

A CMOS Integrated CC-ISFET Device for Water Quality Monitoring

This study presents a performance analysis of low power CMOS Integrated “Current Conveyor Ion Sensitive Field Effect transistor” (CC-ISFET). The study’s main focus is on simulation of power and performance analysis of ISFET device, which is used for water quality monitoring. This approach can improve calibration of device to a fairly wide range without the use of a high speed digital processor....