教師著作

Permanent URI for this collectionhttp://rportal.lib.ntnu.edu.tw/handle/20.500.12235/31268

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    A 60-GHz CMOS power amplifier with built-in pre-distortion linearizer
    (Institute of Electrical and Electronics Engineers (IEEE), 2011-12-01) Jeng-Han Tsai; Chung-Han Wu; Hong-Yuan Yang; Tian-Wei Huang
    A built-in pre-distortion linearizer using cold-mode MOSFET with forward body bias is presented for 60 GHz CMOS PA linearization on 90 nm CMOS LP process. The power ampli- fier (PA) achieves a of 10.72 dBm and of 7.3 dBm from 1.2 V supply. After linearization, the has been doubled from 7.3 to 10.2 dBm and the operating PAE at consequently improves from 5.4% to 10.8%. The optimum improvement of the IMD3 is 25 dB.
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    Design of 1.2 V broadband, high data-rate CMOS MMW I/Q modulator and demodulator using modified Gilbert-cell mixer
    (IEEE Microwave Theory and Techniques Society, 2011-05-01) Jeng-Han Tsai
    In this paper, low-voltage evolution and high-speed operation mixer design are presented for millimeter-wave (MMW) CMOS in-phase/quadrature (I/Q) modulator and demodulator. The modified Gilbert-cell mixer architecture, which eliminates the three-level transistors stacking in the conventional Gilbert-cell mixer, can operate at a reduced supply voltage while maintaining reasonable performance. In addition, IF transimpedance amplifier buffer and wideband RF design are introduced to increase the operation speed of the mixer for MMW gigabit wireless transmission link applications. Using a 0.13-μm CMOS process, the I/Q modulator and demodulator formed with the modified Gilbert-cell mixers are demonstrated at the MMW. Under 1.2-V standard supply voltage, the modulator and demodulator exhibit excellent conversion gain (CG) flatness of -3.5 ±1.5 dB and -3 ±1.5 dB from 41 to 69.5 GHz and 31 to 69 GHz, respectively. For 60-GHz wireless personal area network applications, π/4 differential quadrature phase-shift keying, 16 quadrature amplitude modulation, and binary phase-shift keying modulation signal tests are successfully performed through the direct-conversion system. The results show that the presented monolithic microwave integrated circuits can operate at low-voltage and low-power while providing good CG and high data rate, even up to multigigabit.