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

fYear

2005

fDate

23-26 May 2005

Firstpage

3676

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1465427

Filename

1465427