Resistor array performance errors associated with extended targets

Sisko, Richard Bryan; Marlow, Steven Arthur; Huber, August J.; Thompson, Rhoe A.

doi:10.1117/12.669307

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2018

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“…However, the drive electronics of IR emitter arrays, which are referred to as read-in integrated circuits (RIICs), employ very large amounts of current in order to heat the emitter arrays to high temperatures, causing severe voltage drops along power lines. The resultant array-wide ground-level variations cause RIICs to generate spatially non-uniform driving currents [4]. The variations in the ground voltage are scene-dependent as well; this characteristic poses significant challenges to non-uniformity correction [5].…”

Section: Introductionmentioning

confidence: 99%

Mismatch-tolerant read-in IC with voltage-drop compensation for infrared scene projectors

Shin

Cho

Lee

2018

IEICE Electron. Express

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This letter presents a mismatch-tolerant read-in integrated circuit (RIIC) with voltage-drop compensation applicable to high-speed and hightemperature infrared scene projectors. A current-programmed unit pixel is designed to compensate for ground-line voltage drops, thus improving the array-wide current uniformity. The proposed mismatch-tolerant design circumvents non-monotonic fluctuations in the output current, irrespective of the matching properties of sampling capacitors and switches. A prototype RIIC with a 32 × 32 unit-pixel array is fabricated in a 0.18-µm CMOS process. The RIIC compensates for voltage drops up to 500 mV with error currents below 1 µA and achieves 10-bit accuracy with output-current nonmonotonicity eliminated.

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Section: Introductionmentioning

confidence: 99%