This paper describes a readout channel suitable for infrared and terahertz bolometric sensors arrays where the signal integration is performed simultaneously with the analog-to-digital conversion in a columnwise architecture. By exploiting the need of an integrator both in conventional IR readout channels and incremental converters, the proposed circuit implements a 5-bit continuous-time incremental conversion during signal integration, then the same electronics is used to perform an additional 6-bit algorithmic conversion on the integrator residual voltage. A prototype of the channel has been fabricated in standard CMOS technology (0.35μm 2P4M) featuring 11-bit digital output at 7.12ksamples/s and occupying an area of 0.0301mm2 with a power consumption of only 90μW from a supply of 3.3V.

A Column Readout Channel for Infrared and Terahertz Bolometers with Direct Analog to Digital Conversion

Perenzoni, Matteo;Borghetti, Fausto;Gonzo, Lorenzo
2010

Abstract

This paper describes a readout channel suitable for infrared and terahertz bolometric sensors arrays where the signal integration is performed simultaneously with the analog-to-digital conversion in a columnwise architecture. By exploiting the need of an integrator both in conventional IR readout channels and incremental converters, the proposed circuit implements a 5-bit continuous-time incremental conversion during signal integration, then the same electronics is used to perform an additional 6-bit algorithmic conversion on the integrator residual voltage. A prototype of the channel has been fabricated in standard CMOS technology (0.35μm 2P4M) featuring 11-bit digital output at 7.12ksamples/s and occupying an area of 0.0301mm2 with a power consumption of only 90μW from a supply of 3.3V.
9781424453085
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11582/14529
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