The Design of CMOS Electrode-Tissue Impedance Measurement Circuit Using Differential Current Switch with CMFB Bias for Implantable Neuro-Modulation SoCs

2019 ◽  
Author(s):  
Chi-Wei Huang ◽  
Chi-Heng Chung ◽  
Ruei-Syuan Syu ◽  
Chung-Yu Wu
Keyword(s):  
Impedance Measurement ◽  
Measurement Circuit ◽  
Tissue Impedance ◽  
Current Switch ◽  
Differential Current

scholarly journals A High-Performance Skin Impedance Measurement Circuit for Biomedical Applications

2019 ◽  
Vol 28 (07) ◽  
pp. 1950110 ◽  
Author(s):  
K. Hayatleh ◽  
S. Zourob ◽  
R. Nagulapalli ◽  
S. Barker ◽  
N. Yassine ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
High Performance ◽  
Impedance Measurement ◽  
Cmos Technology ◽  
Skin Impedance ◽  
Instrumentation Amplifier ◽  
Measurement Circuit ◽  
Silicon Area ◽  
The Impact ◽  
Mode Interference

This paper describes a high-performance impedance measurement circuit for the application of skin impedance measurement in the early detection of skin cancer. A CMRR improvement technique has been adopted for OTAs to reduce the impact of high-frequency common mode interference. A modified three-OTA instrumentation amplifier (IA) has been proposed to help with the impedance measurement. Such systems offer a quick, noninvasive and painless procedure, thus having considerable advantages over the currently used approach, which is based upon the testing of a biopsy sample. The sensor has been implemented in 65[Formula: see text]nm CMOS technology and post-layout simulations confirm the theoretical claims we made and sensor exhibits sensitivity. Circuit consumes 45[Formula: see text]uW from 1.5[Formula: see text]V power supply. The circuit occupies 0.01954[Formula: see text]mm2 silicon area.

Differential current switch—High performance at low power

1991 ◽  
Vol 35 (3) ◽  
pp. 313-320 ◽  
Author(s):  
E. B. Eichelberger ◽  
S. E. Bello
Keyword(s):  
Low Power ◽  
High Performance ◽  
Current Switch ◽  
Differential Current

scholarly journals Impedance measurement circuit based on improved voltage vector ratio method

2021 ◽  
Vol 680 (1) ◽  
pp. 012036
Author(s):  
Kai Wang ◽  
Shunjiang Wang ◽  
Yue Zuo ◽  
Xingcai Wang ◽  
Ming Gao
Keyword(s):  
Impedance Measurement ◽  
Ratio Method ◽  
Measurement Circuit ◽  
Voltage Vector
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