Abstract
A tunnel field-effect transistor (TFET)-based pixel circuit for well capacity adjustment that does not require subthreshold operation on the part of the reset transistor is presented. In CMOS, this subthreshold operation leads to temporal noise, distortion and fixed pattern noise, becoming a primary limiting performance factor. In the proposed circuit, the asymmetric conduction associated with TFETs is exploited. This property, arising from the inherent physical structure of the device, provides the selective well adjustments during photo-integration which are demanded for achieving high dynamic range. A GaN-based heterojunction TFET has been designed according to the specific requirements for this application.
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