Enhanced Linearity in Intracranial Pressure Monitoring System Through Sample Isolation Bridge ROIC
Source abstract
Abstract
This study presents a sample isolation bridge readout integrated circuit (ROIC) specifically designed for intracranial pressure (ICP) monitoring systems. The ROIC consists of an instrumentation amplifier (IA) and a successive approximation register (SAR) analog-to-digital converter (ADC). Additionally, the output of the IA is isolated to protect against output spikes that could compromise the linearity and stability of the ROIC. Both traditional and proposed ROIC circuits are fabricated using 0.18 µm complementary metal-oxide-semiconductor (CMOS) technology. The peak signal-to-noise ratio (SNR) for the traditional ROIC is 40.9 dB, while the peak signal-to-noise and distortion ratio (SNDR) is measured at 40.1 dB. In contrast, the proposed ROIC, which incorporates the SAR ADC, achieves a peak SNR of 54.6 dB and a peak SNDR of 51.8 dB, demonstrating a significant improvement in linearity. The new ROIC consumes 39.5 µA of current from a 1.8 V power supply and occupies a chip core area of only 0.27 mm2.
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Research context
OpenAlex topics: Analog and Mixed-Signal Circuit Design · CCD and CMOS Imaging Sensors · EEG and Brain-Computer Interfaces
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Research and Development Center of Healthcare Electronics, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China
Beijing Key Laboratory of RFIC Technology for Next-Generation Communications, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China
School of Integrated Circuits, University of Chinese Academy of Sciences, Beijing 101408, China
Funding
National Key Research and Development Program of China
References (47)
Show source-provided references
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