Novel Instrumentation Amplifier Architectures Insensitive to Resistor Mismatches and Offset Voltage for Biological Signal Processing

<pre>In this paper, an instrumentation amplifier architecture for biological signal is proposed. First stage of conventional IA architecture was modified by using fully balanced differential difference amplifier and evaluated by using 1P 2M 0.6μm CMOS process. From HSPICE simulation result, lower common-mode voltage can be achieved by proposed IA architecture. Actual fabrication was done and six chips were evaluated. From the evaluation result, average common-mode gain of proposed IA architecture is 10.84 dB lower than that of conventional one without requiring well-matched resistors. Therefore, the proposed IA architecture is suitable for biological signal processing. </pre>

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Low Common-Mode Gain Instrumentation Amplifier Architecture Insensitive to Resistor Mismatches

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v6i6.pp3247-3254 ◽

2016 ◽

Vol 6 (6) ◽

pp. 3247

Author(s):

Zainul Abidin ◽

Koichi Tanno ◽

Shota Mago ◽

Hiroki Tamura

Keyword(s):

Signal Processing ◽

Instrumentation Amplifier ◽

Cmos Process ◽

Common Mode ◽

Evaluation Result ◽

Biological Signal ◽

Common Mode Voltage ◽

Biological Signal Processing ◽

Differential Difference Amplifier

<pre>In this paper, an instrumentation amplifier architecture for biological signal is proposed. First stage of conventional IA architecture was modified by using fully balanced differential difference amplifier and evaluated by using 1P 2M 0.6μm CMOS process. From HSPICE simulation result, lower common-mode voltage can be achieved by proposed IA architecture. Actual fabrication was done and six chips were evaluated. From the evaluation result, average common-mode gain of proposed IA architecture is 10.84 dB lower than that of conventional one without requiring well-matched resistors. Therefore, the proposed IA architecture is suitable for biological signal processing. </pre>

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A New Instrumentation Amplifier Architecture Based on Differential Difference Amplifier for Biological Signal Processing

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v7i2.pp759-766 ◽

2017 ◽

Vol 7 (2) ◽

pp. 759 ◽

Cited By ~ 2

Author(s):

Zainul Abidin ◽

Koichi Tanno ◽

Shota Mago ◽

Hiroki Tamura

Keyword(s):

Signal Processing ◽

Instrumentation Amplifier ◽

Cmos Process ◽

Common Mode ◽

Second Stage ◽

Biological Signal ◽

Common Mode Voltage ◽

Biological Signal Processing ◽

Differential Difference Amplifier ◽

New Instrumentation

In this paper, a new Instrumentation Amplifier (IA) architecture for biological signal pro-cessing is proposed. First stage of the proposed IA architecture consists of fully balance differential difference amplifier and three resistors. Its second stage was designed by using differential difference amplifier and two resistors. The second stage has smaller number of resistors than that of conventional one. The IA architectures are simulated and compared by using 1P 2M 0:6-m CMOS process. From HSPICE simulation result, lower common-mode voltage can be achieved by the proposed IA architecture. Average common-mode gain (Ac) of the proposed IA architecture is 31:26 dB lower than that of conventional one under 3% resistor mismatches condition. Therefore, the Ac of the proposed IA architecture is more insensitive to resistor mismatches and suitable for biological signal processing.

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