A SoC Integrating ADC and 2DDWT for Video/Image Processing

Hsieh, Chin Fa; Tsai, Tsung Han; Yi, Shu Chung

doi:10.1587/transele.e99.c.415

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2016

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“…Although the structure creates an ADC offset variation, in many cases, the ADC offset is easy to compensate for digitally. Therefore, the structure helps in the design automation environment [7].…”

Section: Introductionmentioning

confidence: 99%

An 11-Bit Single-Ended SAR ADC with an Inverter-Based Comparator for Design Automation

Jen

Lin

2016

IEICE Trans. Electron.

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This paper proposes a low power single-ended successive approximation register (SAR) analog-to-digital converter (ADC) to replace the only analog active circuit, the comparator, with a digital circuit, which is an inverter-based comparator. The replacement helps possible design automation. The inverter threshold voltage variation impact is minimal because an SAR ADC has only one comparator, and many applications are either insensitive to the resulting ADC offset or easily corrected digitally. The proposed resetting approach mitigates leakage when the input is close to the threshold voltage. As an intrinsic headroom-free, and thus low-rail-voltage, friendly structure, an inverter-based comparator also occupies a small area. Furthermore, an 11-bit ADC was designed and manufactured through a 0.35-μm CMOS process by adopting a low-power switching procedure. The ADC achieves an FOM of 181 fJ/Conv.-step at a 25 kS/s sampling rate when the supply voltage V DD is 1.2 V. key words: Analog-to-digital converter, successive approximation register ADC, inverter-based, design automation.

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Section: Introductionmentioning

confidence: 99%