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The sensor interface IC, a means to acquire real-world information, is an essential piece of many practical systems. Depending on applications, the design challenges of the sensor interface IC also vary. The research interest in this program includes ultra-low-power design for biomedical and wireless sensor network applications, high-precision sensing for industrial monitoring, navigation, and consumer electronics, high-temperature operation for automotive, aerospace, and oil & gas industry. To address these challenges, we have developed new analog & mixed-signal circuit designs, including analog front-end and data conversion circuits, advancing state-of-the-art in the field and creating an impact when integrated with MEMS/CMOS/nano/bio/photo sensors in the context of emerging microsystems.
Neural Interface ICs
Interfacing with the brain through a large number of electrodes provides an effective way for neuroscientists and clinicians to study the dynamic connectivity and functions of the brain and understand the nature of various neurophysiological behaviors. My research group focused on the development of a high-efficiency neural stimulation ICs and neural recording ICs for bidirectional closed-loop neural interfaces.
Ultrasound Transducer Interface ICs
Ultrasound systems are essential tools for clinical diagnostics and therapeutics owing to its medical safety and low manufacturing cost. My research group developed extremely energy-efficient ultrasound transmitter and receiver, which can nicely interface with piezoelectric transducers (PZTs) and capacitive micromachined ultrasound transducers (CMUTs), enabling the extremely miniaturized ultrasound imaging system.
Impedance Measurement ICs
Impedance sensing finds a variety of applications, such as DNA analysis, blood characterization, ischemia detection, cancer diagnosis, lung imaging, ECG monitoring, gesture monitoring, and proximity sensing because it can provide crucial information about the molecule, cell, tissue, organ, or body in a noninvasive manner with a small form factor and low cost, making it suitable for wearable and implantable monitoring devices.
Sensor Interface ICs for wireless sensor nodes, mobile/wearable devices, and biomedical applications
My research group has worked on various low-power sensor interface ICs for different applications. For example, low-power high-dynamic-range accelerometer IC, ROIC for ion-sensitive field-effect transistors (ISFETs), oscillator-based ratiometric time-domain ROIC, RC-to-digital converter for IoT sensor nodes, and low-power radiation sensor interface ICs for mobile dosimeters.
Sensor Interface ICs for industrial applications
My research group has developed high-performance or rugged sensor interface ICs for industrial applications. For example, AFE IC interfacing with a MEMS accelerometer, temperature sensor ICs for oil and gas industry, and rugged radiation sensor interface IC to detect an accident at nuclear plants in the early stage.
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