Charge-transfer device (CTD), which eliminates the background level of a detected signal, detection structure and method of using such a CTD

摘要

Charge-transfer device (CTD), which eliminates the background level of a detected signal, equipped with an input circuit which comprises an injection source 12 and an electrode 16 which controls a storage potential well which can be subdivided into a background-level well 18 and a signal well 19 which are separated by the separation potential created by a separation electrode 27. This CTD is notable in that its input circuit comprises a floating electrode 25 connected to the separation electrode 27 so that the separation potential is slaved to the background level, and an isolation electrode 28 which isolates the reference well 29 from the signal well 19 during measurement operations. This device makes it possible to produce structures for infrared detection with the aid of CdxHg1-xTe detectors. <IMAGE>