In this work, we explore the MOS interface-trap charge-pump as an ultralow constant-current generator for analog CMOS applications. Charge pumping techniques in general are more suitable than conventional continuous-time techniques for ultralow current generation because the linear controllability of current by frequency is maintained regardless of the level of current. An interface-trap pump has the same property but the minimum charge it puts out per cycle is at least two orders of magnitude smaller than that of a switched-capacitor charge pump. This helps generate the same current more accurately at a much higher frequency with a much smaller filter capacitance. The paper presents a simplified model of the terminal characteristics of the interface-trap pump and an evaluation of its performance as a stand-alone current generator. Cascoding and complementary pumping are introduced as measures of performance improvement. Temperature sensitivity, pulse feedthrough, controllability, matching, reliability, and trimming issues are addressed. Transconductor circuits built with the charge pump are presented and experimentally evaluated.

No abstract

Cyan Systems has continued to mature our small pixel camera performance, including improvements in the packaging, optics, and electronics. The associated camera components demonstrate key resolution and enabling capabilities. We report on recent results from our new digital readout integrated circuit (DROIC) small pixel mid-wave infrared camera with an ultra-high-definition (3840 x 2160) format, in addition to demonstrations with Cyan’s CS-3 full-high-definition (1920 x 1080) camera. We address small pixel spatial sampling and modulation transfer function issues as the pixel size shrinks, and we examine the difference between the performance of present devices and the new generation of small pixel cameras.

No abstract

No abstract