◇ Research area · Wafer-scale CMOS X-ray detector - High-resolution column-parallel ADC - 3-side buttable readout architecture - Reference, bias, and signal transmission techniques for large-sized IC

|

|
CMOS image sensor
|
Wafer-scale CMOS X-ray detector
|
◇ Research results · CMOS X-ray detector - Process: 0.35-μm 1P4M CMOS process - Sensitivity: 0.11 V/mR - MTF: 32.8% at 4.86 lp/mm - ADC resolution: 14.3 bits - Max. frame rate: 60 frames/s

|

|
Captured images (line pair, characters, package)
|
Chip Microphotograph
|
◈ Bio-Signal Monitoring System
◇ Introduction - In recent years, with the rapid growth of portable electronics market, the demand for a human-computer interface (HCI) has continued to increase We have been developed readout front-end for the HCI. Our goal is to create bio-sensors with high performance and low power consumption.
◇ Research area · Bio-sensors ◇ Research results · EMG readout front-end - Process: 0.18 μm CMOS - Area: 1.2 × 1.1 mm² - CMRR: 105 dB - Power dissipation: 19 μW

|

|

|
Chip Microphotograph
|
Extracted EMG signal from readout front-end
|
◈ 3-D Ultrasound Imaging System
◇ Introduction
|
- 3-D ultrasound imaging systems are increasingly used for medical diagnosis such as fetal examination, assessment of cardiac function, and tumor localization, etc. For implementation of high-resolution 3-D ultrasound imaging systems, 2-D active capacitive micro-machined ultrasound transducer (CMUT) array have been interest over the year. We have researched the 2-D active CMUT array based 3-D ultrasound imaging systems with high-resolution and high frame rate.
|
◇ Research area · 2-D active capacitive micro-machined ultrasound transducer (CMUT) array · High-performance data acquisition(DAQ) system for ultrasound imaging system ◇ Research results · Three-side buttable 16×16 active CMUT array - Fully-integrated 16×16 transceivers with transmitting beamforming - Programmable beamforming methods - 159 % frame rate enhancement

|

|

|
Measured output waveforms of fabricated active CMUT array
|
Measured input referred pressure noise
|
Acquired 3-D ultrasound image by using spring phantom with 0.6 mm diameter
|
◇ Chip - Process : 120V 0.35-μm BCD process - Area : 7 mm × 4.4 mm - Input referred pressure noise : 0.6 mPa/√Hz - Output voltage of HV pulse : 120V - Minimum delay control step : 5ns
|