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Creators/Authors contains: "Ha, Dong"

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  1. ; ; ; (, IEEE (Proceedings of the 2024 IEEE NEWCAS Conference))
    This paper introduces an automatic amplitude control (AAC) mechanism implemented on a class-C LC-based phase shifter. The AAC technique compensates for the amplitude attenuation of the phase shifter as a function of frequency and provides output swing control that enhances the suitability as a phase shifter in the auxiliary path of a load-modulated balanced power amplifier (LMB-PA). It can be utilized to calibrate and fine-tune the power amplifier (PA) performance after fabrication to achieve optimal performance. The circuit is designed and laid out using 22−nm FD-SOI process technology. To demonstrate the proposed idea, the frequency of operation was chosen as 2.4 GHz. The total power consumption varies between 0.52 − 1 mW due to phase control from 0 − 120â—¦ with 0.085 dB amplitude error. 
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    Accepted Manuscript Full Text Available
  2. ; ; ; (, IEEE)
    Full Text Available 
  3. ; ; ; (, IEEE)
    Free, publicly-accessible full text available December 15, 2025
  4. ; ; ; (, IEEE)
    Full Text Available 
  5. ; (, IEEE)
    Full Text Available 
  6. ; ; ; ; (, IEEE Internet of Things Journal)
    Full Text Available 
  7. ; ; (, IEEE International Midwest Symposium on Circuits and Systems)
    Wireless sensor nodes (WSNs) are useful to monitor animals remotely and continuously. The proposed WSN aims to monitor pig activities, and it consists of a 3-axis accelerometer, a 3-axis gyroscope, and a microcontroller with embedded BLE (Bluetooth Low Energy) radio. The WSN was designed and prototyped with a custom PCB and used to collect data from pigs in field for about 131 hours, and the collected data was processed to classify pig behaviors with machine learning models. The sampling rate of the sensors is 10 samples per second. The proposed WSN dissipates 6.29 mW, on average, and the peak power dissipation is 41.01 mW during transmission of the sensed data. The WSN is estimated to operate for about three weeks with a coin cell battery CR2477. 
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    Accepted Manuscript Full Text Available
  8. ; (, ACM)
  9. ; (, IEEE)
    Full Text Available 
  10. ; ; ; (, IEEE)
    Full Text Available