Title :
A Temperature-Compensated Electrometer for Environmental Measurements
Author :
Negro, Vincent C. ; Watnick, Sidney ; Raft, Peter
Author_Institution :
U. S. Atomic Energy Commission Health and Safety Laboratory New York, New York 10014
Abstract :
An electrometer which uses a single MOSFET as the current-detecting and temperature-compensating element is described. The input drift is less than 3 x 10-15 A from -20°C to +40°C. This electrometer is used in radiological field instruments which have been operating continuously for over a year. It can resolve changes down to 0.1 ¿R/hr (2.5 × 10-15 A) in a background exposure rate of 6-10 ¿R/hr.
Keywords :
Atomic measurements; Cleaning; Current measurement; Heat treatment; Leakage current; MOSFET circuits; Packaging; Power MOSFET; Testing; Voltage;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1974.4327554
