Abstract
A new device architecture was developed for building high-performance and high-resolution image sensors suitable for consumer TV camera applications. The sensor elements employed in this architecture are junction field-effect transistors that are organized into an array with their gates floating and capacitively coupled to common horizontal address lines. The photogenerated signal is sampled one line at a time, processed to remove the element-to-element nonuniformities, and stored in a buffer for subsequent readout. The described concept, which includes an intrinsic exposure control, is demonstrated on a test image sensor that has an 8-mm sensing area diagonal and 580(H) x 488(V) picture sensing elements. The key performance parameters achieved in this design, in addition to a high packing density of sensing elements with a unique hexagonal shape, include high signal uniformity, low dark current, good light sensitivity, high blooming overload protection, and no image smear.
Published Version
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