Dual‐mode wide‐range linear CMOS interface circuit for resistive sensors. Issue 22 (1st October 2014)

• Record Type: Journal Article
• Authors: Kim, Sung‐Woo; Eom, Won‐Jin; Choi, Jaehyouk; Kim, Jae Joon
• Is Part Of: Electronics letters. Volume 50:Issue 22(2014)
• Page Start: 1575
• Page End: 1577
• Publication Date: 2014-10-01
• Subjects: sensors -- analogue‐digital conversion -- CMOS integrated circuits; dual‐mode wide‐range linear CMOS interface circuit -- resistive sensors -- dual‐mode adaptive method -- wide‐range linear sensing -- high‐R mode -- resistance‐digital converter -- RDC -- analogue‐to‐digital converter -- ADC -- adaptive current source -- dual‐mode sensor interface -- power dissipation -- size 0.18 mum -- resistance 750 kohm to 1.2 Mohm -- voltage 1.8 V -- power 2.6 muW to 3.1 muW; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2014.1411
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A dual‐mode adaptive method to provide a wide‐range linear sensing characteristic over various resistive sensors is presented. A high‐ R mode acts as a resistance‐to‐digital converter without an analogue‐to‐digital converter (ADC), and a low‐ R mode utilises an adaptive current source to keep the required ADC resolution below 8 bits. A prototype of the dual‐mode sensor interface was fabricated in a 0.18 μm CMOS process, and its measured coverage of sensor resistance was from 750 to 1.2 MΩ. The power dissipation with a 1.8 V supply was 2.6–3.1 μW in the high‐ R mode and 0.31–2.1 mW in the low‐ R mode.