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A CMOS 16-bit 20MSPS analog front end for scanner/MFP applications

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3 Author(s)
Seung-Bin You ; Electron. Eng. Dept., Korea Univ., Seoul, South Korea ; Jae-Whui Kim ; Suki Kim

This paper presents a monolithic 16-bit analog front end (AFE) chip for CCD/CIS scanners and multifunction peripheral (MFP) systems incorporating a 16-bit analog-to-digital converter (ADC), a 3-channel high resolution correlated double sampler (CDS), a programmable gain amplifier (PGA) and an on-chip voltage reference. The proposed AFE, fabricated in a Samsung Electronics Corporation's (SEC's) 0.35 μm CMOS process, occupies an active area of 8mm2 and consumes 300 mW at a 3 V supply. For the full signal path (CDS-PGA-ADC), no missing code is guaranteed at a 16-bit resolution and typical differential nonlinearity (DNL) and integral nonlinearity (INL) are +1.3/-0.92 LSB and +6.7/-16.6 LSB, respectively.

Published in:

IEEE Transactions on Consumer Electronics  (Volume:49 ,  Issue: 3 )