Energy‐efficient charge‐average switching DAC with floating capacitors for SAR ADC. Issue 16 (1st July 2014)

• Record Type: Journal Article
• Authors: Kim, Ju Eon; Cho, Seong‐Jin; Kim, Yong Sin; Lee, Seok; Baek, Kwang‐Hyun
• Is Part Of: Electronics letters. Volume 50:Issue 16(2014)
• Page Start: 1131
• Page End: 1132
• Publication Date: 2014-07-01
• Subjects: flip‐flops -- digital‐analogue conversion -- capacitors -- analogue‐digital conversion; DAC -- floating capacitors -- successive‐approximation register -- analog‐to‐digital converters -- SAR -- ADC -- energy‐efficient capacitor switching -- digital‐to‐analog converter -- charge‐average switching -- most significant bit capacitors; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2014.1792
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : An energy‐efficient capacitor switching digital‐to‐analogue converter (DAC) is proposed for successive‐approximation register analogue‐to‐digital converters (SAR ADCs). The proposed charge‐average switching with floating capacitors (CASFCs) DAC disconnects the most significant bit (MSB) capacitors from the capacitor array after determining the MSB. The switching energy of the proposed CASFC DAC is lower than that of the recently published DAC, because the CAS technique is only employed in the CASFC DAC, while both the traditional and CAS methods are used in the previous DAC depending on inputs. In addition, the energy during the reset period is also minimised because the floated MSB capacitors do not consume the reset energy. The CASFC DAC reduces the switching energy with and without reset by 64.4 and 37.5%, respectively, compared with the aforementioned previous DAC.