Y.-H. LiuTSUNG-HSIEN LIN2018-09-102018-09-102008-09http://scholars.lib.ntu.edu.tw/handle/123456789/343021A 400-MHz phase-mux-based O-QPSK transmitter (TX) for medical imaging applications is presented in this paper. The modulation signal is generated by selecting one of the four quadrature phases to the TX output via a proposed Phase MUX. An inverter-type power amplifier is utilized for it is compatible with the quasi constant-envelope nature of the O-QPSK modulation. Fabricated in a 0.18-μm CMOS process, the whole TX draws 2.9 mA from a 1.2-V supply. With a maximum 15Mbps data rate, the TX achieves an energy efficiency of 0.23 nJ/bit and delivers an output power up to -7 dBm. © 2008 IEEE.[SDGs]SDG7Energy efficiency; Image segmentation; Integrated circuits; Modulation; Power amplifiers; Quadrature phase shift keying; Transmitters; Water well pumps; CMOS processes; Data rates; Imaging applications; Modulation signals; Output powers; Qpsk modulations; Quadrature phasis; Quasi constants; Medical imagingconference paper10.1109/CICC.2008.46721572-s2.0-57849083091