Title :
A 5 MHz Nyquist rate continuous-time sigma-delta modulator for wideband wireless communication
Author :
Lin, Chi-Hung ; Chunlei Shi ; Ismail, Mohammed ; Gyu, Moon
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
A 3 V continuous-time sigma-delta A/D converter is presented to optimize high speed baseband channels of radio receivers in wideband spread-spectrum communication. A second-order continuous-time sigma-delta ADC is proposed to simplify high-speed baseband design with the inherent characteristics of lowpass filtering and A/D conversion. In 1.2 μm CMOS technology, the sigma-delta ADC has a 2.5 MHz bandwidth and 65 dB (⩾10 bits) dynamic range with 80 MHz oversampling clock and 12 mW power dissipation
Keywords :
CMOS integrated circuits; continuous time systems; low-pass filters; mobile radio; sigma-delta modulation; spread spectrum communication; 1.2 micron; 12 mW; 2.5 MHz; 3 V; 5 MHz; 80 MHz; CMOS technology; Nyquist rate continuous-time sigma-delta modulator; high speed baseband channels; lowpass filtering; oversampling clock; power dissipation; spread-spectrum communication; wideband wireless communication; Bandwidth; Baseband; CMOS technology; Clocks; Delta-sigma modulation; Dynamic range; Filtering; Receivers; Spread spectrum communication; Wideband;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780735
