Title :
A tunable bandpass ΔΣ modulator using double sampling
Author :
Kuo, Chien-Hung ; Chen, Chang-Hung ; Lin, Huang-Shih ; Liu, Shen-Iuan
Author_Institution :
Dept. of Electr. Eng., Tamkang Univ., Tamsui, Taiwan
Abstract :
A tunable switched-capacitor (SC) bandpass delta sigma (ΔΣ) modulator using double sampling by one input parameter is proposed. The center frequency of the modulator can be varied from fs/14 to 6fs/14 at a sampling frequency (fs) of 70 MHz. Its performance can be hence improved by fine tuning the center frequency. The purposed modulator was implemented in 0.35-μm 2P4M CMOS standard technology with the core area of 4.2 mm2. The measured dynamic range of 68 dB within 200 kHz bandwidth can be achieved. Its power consumption is 58 mW under a 3.3-V supply voltage.
Keywords :
CMOS integrated circuits; band-pass filters; circuit tuning; delta-sigma modulation; integrated circuit measurement; low-power electronics; signal sampling; switched capacitor networks; 0.35 micron; 200 kHz; 3.3 V; 58 mW; 70 MHz; CMOS standard technology; bandwidth; center frequency fine tuning; core area; double sampling; input parameter sampling; measured dynamic range; modulator center frequency; power consumption; sampling frequency; supply voltage; tunable bandpass ΔΣ modulator; tunable switched-capacitor bandpass delta sigma modulator; Bandwidth; CMOS technology; Delta modulation; Dynamic range; Frequency modulation; Radio frequency; Receivers; Sampling methods; Tunable circuits and devices; Tuning;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465427
