Current measurement transducer based on current-to-voltage-to-frequency converting ring oscillator with cascade bias circuit

Jongha Park; Jung Hyun Park; Seong Ook Jung

doi:10.3390/s20020493

Current measurement transducer based on current-to-voltage-to-frequency converting ring oscillator with cascade bias circuit

Jongha Park, Jung Hyun Park, Seong Ook Jung

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	493
Journal	Sensors (Switzerland)
Volume	20
Issue number	2
DOIs	https://doi.org/10.3390/s20020493
Publication status	Published - 2020 Jan 2

Bibliographical note

Funding Information:
This work was funded by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2015M3A7B7045470).

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Biochemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Electrical and Electronic Engineering

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title = "Current measurement transducer based on current-to-voltage-to-frequency converting ring oscillator with cascade bias circuit",

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.",

author = "Jongha Park and Park, {Jung Hyun} and Jung, {Seong Ook}",

note = "Funding Information: This work was funded by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2015M3A7B7045470).",

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