A 3.5-mW 15-Mbps O-QPSK Transmitter for Real-time Wireless Medical Imaging Applications
Journal
IEEE CICC
Pages
599-602
Date Issued
2008-09
Author(s)
Y.-H. Liu
Abstract
A 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
Other Subjects
Energy 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 imaging
Type
conference paper