A TDI Charge-Coupled Imaging Device for Page Scanning

An experimental 2048x 32-stage time-delay and integration (TDI) charge-coupled optical imaging device has been designed, fabricated, and operated. It is designed for high-speed low-noise full-page document imaging with moderate illumination. This paper presents an overview of its design and performance, detailing unusual design features. These include a photocharge capacity of 3.5 million electrons per pel a parallel-to-serial interface design that avoids a common charge-transfer bottleneck, and a new fast large-signal output stage. A discussion is included of the merits of TDI in document imaging applications. © 1986 IEEE.