Current Measurement Transducer Based on Current-To-Voltage-To-Frequency Converting Ring Oscillator with Cascade Bias Circuit

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ID: 117489
2020
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Abstract
We propose a ring oscillator (RO) based current-to-voltage-to-frequency (I–V–F) converting current transducer with a cascade bias circuit. The I–V–F converting scheme guarantees highly stable biasing against RO, with a rail-to-rail output operation. This device was fabricated using National NanoFab Center (NNFC) 180 nm complementary metal-oxide-semiconductor (CMOS) technology, which achieves a current resolution of 1 nA in a measurement range up to 200 nA. A noise floor of 11.8 pA/√Hz, maximum differential nonlinearity (DNL) of 0.15 in 1 nA steps, and rail-to-rail output with a 1.8 V power supply is achieved. The proposed transducer can be effectively applied to bio-sensing devices requiring a compact area and low power consumption with a low current output. The fabricated structure can be applied to monolithic-three-dimensional integration with a bio-sensing device.
Reference Key
park2020sensorscurrent Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Jongha Park;Jung-Hyun Park;Seong-Ook Jung;Park, Jongha;Park, Jung-Hyun;Jung, Seong-Ook;
Journal sensors
Year 2020
DOI
10.3390/s20020493
URL
https://www.mdpi.com/1424-8220/20/2/493
Keywords
Biosensor current-to-frequency (i–f) converting current transducer current-to-voltage-to-frequency (i–v–f) converting current transducer ring oscillator (ro)

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