Title :
A CMOS quadrature modulator for wireless communication IC
Author :
Lin, P.F. ; Lou, J.H. ; Kuo, J.B.
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
6/1/1997 12:00:00 AM
Abstract :
This brief presents a CMOS digital quadrature modulator, which is based on a CMOS digital modulator and a five-level digital-to-analog converter, for wireless communication IC. In the digital modulator, a circular shift register is used to produce a continuous sinusoidal wave with different phases. With this technique, the quadrature modulator has advantages in low power consumption, small area, and expansion capability
Keywords :
CMOS digital integrated circuits; digital-analogue conversion; modulators; radio equipment; shift registers; CMOS digital quadrature modulator; circular shift register; digital-to-analog converter; low power circuit; sinusoidal wave; wireless communication IC; Baseband; CMOS digital integrated circuits; CMOS integrated circuits; Continuous phase modulation; Digital modulation; Digital-analog conversion; Energy consumption; Frequency; Shift registers; Wireless communication;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
