Title :
A 1.2V 3.5mW ΔΣ modulator with a passive current summing network and a variable gain function
Author :
Nagai, Toshiaki ; Satou, Hiroyuki ; Yamazaki, Hiroshi ; Watanabe, Yuu
Author_Institution :
Fujitsu, Kawasaki, Japan
Abstract :
A 1.2V 3.5mW CT ΔΣ modulator with a mixer for a mobile digital TV receiver is implemented in 0.11 μm CMOS. A current summing network composed of passive elements is used in the loop filter feedforward path, contributing to the low power consumption. A 78dB total DR is achieved by varying the DAC output power with the input signal power.
Keywords :
CMOS integrated circuits; delta-sigma modulation; digital television; feedforward; passive filters; power consumption; television receivers; ΔΣ modulator; 0.11 micron; 1.2 V; 3.5 mW; CMOS; DAC; loop filter feedforward path; mixer; mobile digital TV receiver; passive current summing network; power consumption; variable gain function; Bandwidth; Delta modulation; Digital modulation; Dynamic range; Energy consumption; Filters; Gain; Power generation; Radio broadcasting; Receivers;
Conference_Titel :
Solid-State Circuits Conference, 2005. Digest of Technical Papers. ISSCC. 2005 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8904-2
DOI :
10.1109/ISSCC.2005.1494085
