Title :
Low-current sensing circuit and topology for portable gamma radiation sensor
Author :
Ailavajhala, Mahesh S. ; Latif, Muhammad Rizwan ; Mitkova, M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Boise State Univ., Boise, ID, USA
Abstract :
A sensing circuit is presented for a portable/handheld semiconductor based radiation sensor, which senses low current changes without the inclusion of transistor noise issues. This circuit design block was implemented using supporting circuit architectures to enable sensing between 33pA to 1nA using low voltages. Additionally, a unique circuit topology is presented by which the effect of radiation damage to the silicon substrate and any devices on the substrate is reduced.
Keywords :
MOSFET; electric sensing devices; gamma-rays; low-power electronics; network topology; radiation effects; Si; circuit design block; circuit topology; current 33 pA to 1 nA; low voltages; low-current sensing circuit; low-current sensing topology; portable gamma radiation sensor; portable-handheld semiconductor; radiation damage; silicon substrate; transistor noise; Capacitors; Circuit synthesis; Integrated circuit modeling; Sensors; Substrates; Topology; Circuit topology; Low-current; Radiation sensing circuitry;
Conference_Titel :
Microelectronics And Electron Devices (WMED), 2014 IEEE Workshop On
Conference_Location :
Boise, ID
Print_ISBN :
978-1-4799-2222-2
DOI :
10.1109/WMED.2014.6818723
