A near-infrared heart rate sensor IC With Very Low Cutoff Frequency Using Current Steering Technique

Alex Wong; Kong Pang Pun; Yuan Ting Zhang; Kevin Hung

doi:10.1109/ISCAS.2005.1465189

A near-infrared heart rate sensor IC With Very Low Cutoff Frequency Using Current Steering Technique

Alex Wong, Kong Pang Pun, Yuan Ting Zhang, Kevin Hung

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

In this paper, a near-infrared (NIR) heart-rate sensor IC, which will be used for portable biomedical application, was designed. This sensor consists of a current-tovoltage (I-V) converter, sample-and-hold (S/H) circuit, continuous time low-pass filter (CT-LPF), comparator and clock generation circuitry. Both switched-capacitor and current steering technique are used. Current steering technique is being employed in the design of CT-LPF due to the very low cutoff frequency requirement. As a result, only 20pF and 38pF capacitors are used to implement a 2nd order filter with cutoff frequency of 18Hz. The circuit consumes 4.2mW when operating from a 3-V battery and occupies a core area of 0.46mm ². The design was fabricated using 0.35um CMOS technology and simulation results show that the circuit works properly.

Original language	English
Article number	1465189
Pages (from-to)	2723-2726
Number of pages	4
Journal	Proceedings - IEEE International Symposium on Circuits and Systems
DOIs	https://doi.org/10.1109/ISCAS.2005.1465189
Publication status	Published - 2005
Externally published	Yes
Event	IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan Duration: 23 May 2005 → 26 May 2005

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10.1109/ISCAS.2005.1465189

Cite this

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title = "A near-infrared heart rate sensor IC With Very Low Cutoff Frequency Using Current Steering Technique",

abstract = "In this paper, a near-infrared (NIR) heart-rate sensor IC, which will be used for portable biomedical application, was designed. This sensor consists of a current-tovoltage (I-V) converter, sample-and-hold (S/H) circuit, continuous time low-pass filter (CT-LPF), comparator and clock generation circuitry. Both switched-capacitor and current steering technique are used. Current steering technique is being employed in the design of CT-LPF due to the very low cutoff frequency requirement. As a result, only 20pF and 38pF capacitors are used to implement a 2nd order filter with cutoff frequency of 18Hz. The circuit consumes 4.2mW when operating from a 3-V battery and occupies a core area of 0.46mm 2. The design was fabricated using 0.35um CMOS technology and simulation results show that the circuit works properly.",

author = "Alex Wong and Pun, \{Kong Pang\} and Zhang, \{Yuan Ting\} and Kevin Hung",

year = "2005",

doi = "10.1109/ISCAS.2005.1465189",

language = "English",

pages = "2723--2726",

note = "IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 ; Conference date: 23-05-2005 Through 26-05-2005",

}

TY - JOUR

T1 - A near-infrared heart rate sensor IC With Very Low Cutoff Frequency Using Current Steering Technique

AU - Wong, Alex

AU - Pun, Kong Pang

AU - Zhang, Yuan Ting

AU - Hung, Kevin

PY - 2005

Y1 - 2005

N2 - In this paper, a near-infrared (NIR) heart-rate sensor IC, which will be used for portable biomedical application, was designed. This sensor consists of a current-tovoltage (I-V) converter, sample-and-hold (S/H) circuit, continuous time low-pass filter (CT-LPF), comparator and clock generation circuitry. Both switched-capacitor and current steering technique are used. Current steering technique is being employed in the design of CT-LPF due to the very low cutoff frequency requirement. As a result, only 20pF and 38pF capacitors are used to implement a 2nd order filter with cutoff frequency of 18Hz. The circuit consumes 4.2mW when operating from a 3-V battery and occupies a core area of 0.46mm 2. The design was fabricated using 0.35um CMOS technology and simulation results show that the circuit works properly.

AB - In this paper, a near-infrared (NIR) heart-rate sensor IC, which will be used for portable biomedical application, was designed. This sensor consists of a current-tovoltage (I-V) converter, sample-and-hold (S/H) circuit, continuous time low-pass filter (CT-LPF), comparator and clock generation circuitry. Both switched-capacitor and current steering technique are used. Current steering technique is being employed in the design of CT-LPF due to the very low cutoff frequency requirement. As a result, only 20pF and 38pF capacitors are used to implement a 2nd order filter with cutoff frequency of 18Hz. The circuit consumes 4.2mW when operating from a 3-V battery and occupies a core area of 0.46mm 2. The design was fabricated using 0.35um CMOS technology and simulation results show that the circuit works properly.

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U2 - 10.1109/ISCAS.2005.1465189

DO - 10.1109/ISCAS.2005.1465189

M3 - Conference article

AN - SCOPUS:67649086305

SN - 0271-4310

SP - 2723

EP - 2726

JO - Proceedings - IEEE International Symposium on Circuits and Systems

JF - Proceedings - IEEE International Symposium on Circuits and Systems

M1 - 1465189

T2 - IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005

Y2 - 23 May 2005 through 26 May 2005

ER -

A near-infrared heart rate sensor IC With Very Low Cutoff Frequency Using Current Steering Technique

Abstract

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