Title :
Chemical log-domain filter
Author :
Georgiou, P. ; Toumazou, C.
Author_Institution :
Inst. of Biomed. Eng., Imperial Coll. London, London
Abstract :
Presented is a chemical log-domain filter in which an ion sensitive field effect transistor (ISFET) is used to expand a naturally log-compressed chemical signal to derive a chemically-dependent lossy-integrator, whose gain and bandwidth are functions of ion concentration. This is used to integrate small chemical signals or have a filter adaptable to changes in chemical concentration.
Keywords :
filters; ion sensitive field effect transistors; chemical log-domain filter; chemically-dependent lossy-integrator; ion sensitive field effect transistor; log-compressed chemical signal;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.0152
