Browsing by Author "Liu, Li-Chen"

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A Low Power 10Bit 500kS/s Delta-Modulated SAR ADC (DMSAR ADC) for Implantable Medical Devices
(2013)
Lyu, Yuan-Fu
;
Wu, Chung-Yu
;
Liu, Li-Chen
;
Chen, Wei-Ming
;
電子工程學系及電子研究所
An architecture of SAR ADC called the delta-modulated SAR ADC (DMSAR ADC) is proposed and designed for medical device applications. In the proposed DMSAR ADC, only the voltage difference between two successive samples is resolved to reduce the conversion steps and decrease the power consumption per channel up to 66%. The experimental chip is implemented in 0.18 mu m CMOS technology. At the digital supply voltage of 1.35V and Vref=1.00V, the measured power consumption per channel is 1.38 mu W (2.71 mu W) and the measured SNDR is 56.68dB (53.89 dB) for Fin=10Hz (7kHz). The ENOB is 9.12b and FoM is 39.54fJ/step.
A MedRadio-Band Low-Energy-Per-Bit 4-Mbps CMOS OOK Receiver for Implantable Medical Devices
(2013)
Chou, Chia-Wei
;
Liu, Li-Chen
;
Wu, Chung-Yu
;
交大名義發表
;
電子工程學系及電子研究所
A 4-Mbps 400-MHz On-Off Keying (OOK) receiver implemented in 0.18-um CMOS technology for implantable epilepsy sense-and-stimulation devices is presented. The proposed receiver is composed of a new current-mode full-wave envelope detector and differential cascaded gain amplifiers which is operated at MedRadio band. The fabricated receiver has power consumption of 0.27 mW and energy consumption of 0.07 nJ per bit at 4-Mbps. The sensitivity of receiver is -45.67 dBm.
A MedRadio-Band Low-Energy-Per-Bit CMOS OOK Transceiver for Implantable Medical Devices
(2011)
Liu, Li-Chen
;
Ho, Ming-Han
;
Wu, Chung-Yu
;
電機學院
;
電子工程學系及電子研究所
A 2-Mbps 400-MHz On-Off Keying (OOK) transceiver implemented in 0.18-mu m CMOS technology for implantable epilepsy devices is presented. The proposed transceiver is composed of voltage control oscillator (VCO) and OOK function generator in the transmitter part, and new current-mode envelope detector and cascaded gain amplifiers in the receiver part. The fabricated transmitter has power consumption of 0.84 mW and energy consumption of 0.42 nJ per bit. The fabricated receiver has power consumption of 0.59 mW and energy consumption of 0.295 nJ per bit. The sensitivity of receiver is -45 dBm.