Low power DAC with single capacitor sampling method for SAR ADCs

An ultra-efficient switching method for successive approximation register ADCs is proposed. In this method, the input signals are sampled in a special fashion to reduce the switching energy. Owing to the sampling method, only one reference voltage (Vq = Vref/4) is required to implement the switching...

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Bibliographic Details
Published in:Electronics letters 2016-07, Vol.52 (14), p.1209-1210
Main Authors: Yazdani, B, Khorami, A, Sharifkhani, M
Format: Article
Language:English
Subjects:
analogue‐digital conversion
Approximation
Circuits and systems
digital‐analogue conversion
Electric potential
Electronics
input signal sampling
low power DAC
low‐power electronics
Mathematical analysis
reference voltage
Registers
Sampling methods
SAR ADCs
signal sampling
single capacitor sampling method
successive approximation register
Switching
switching energy reduction
ultra‐efficient switching method
Voltage
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Description
Summary:An ultra-efficient switching method for successive approximation register ADCs is proposed. In this method, the input signals are sampled in a special fashion to reduce the switching energy. Owing to the sampling method, only one reference voltage (Vq = Vref/4) is required to implement the switching steps. Therefore, in addition to reduction in the switching energy (due to the lower supply voltage), the precision of the DAC is improved. The proposed method reduces the switching energy and area by 99.41 and 50%, respectively, compared with the conventional method.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2016.1286