Browse > Article

A Tunable Bandpass SC Sigma-delta Modulator For Intermediate Frequency With Novel Architecture  

Jo, Se-Jin (Division of Electronics and Information Engineering, Chonbuk University)
Cho, Seong-Ik (Division of Electronics and Information Engineering, Chonbuk University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.48, no.1, 2011 , pp. 50-55 More about this Journal
Abstract
In this paper, Intermediate frequency tunable 4th order Switched Capacitor(SC) bandpass Sigma-Delta(${\Sigma}-{\Delta}$) modulator using feedback integrator using feedback integrator coefficients is proposed. The center frequency of the modulator can be easily changed than conventional structure because of a number of integrator coefficients which is decided rate of capacitors in circuit is reduced. In addition additive clocks and additive clock generating circuit are not necessary. The purposed modulator was implemented in $0.18{\mu}m$ CMOS technology. The resolution of the modulator within 200 kHz bandwidth and 80 MHz sampling frequency under fin = 15 MHz, 20 MHz, 25 MHz are over 12 bit.
Keywords
Sigma-Delta modulator; Bandpass; Tunable; ${\Sigma}-{\Delta}$ modulator;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Chien-Hung Kuo, Chang-Hung Chen, Huang Shin Lin, and Shen-Iuan Liu, "A Tunalbe Bandpass ${\Delta}{\Sigma}$ Modulator Using Double Sampling" IEEE press, 2005.
2 L. Cardelli, L.Fanucci, V. Kempe, F.Mannozzi, and D. Strle, "Tunable bandpass sigma delta modulator using one input parameter" Electoronics Letters, 23rd, vol. 39, No. 2, January 2003.
3 Kentaro Yammamoto, Anthony Chan Carusone, and Francis P. Dawson, "A Delta-Sigma Modulator with a Widely Programmable Center Frequency and 82-dB Peak SNDR", IEEE Journal of solid-state Circuits, vol. 43, no. 8, AUGUST 2008.
4 O. Shoaei and W.M.Snelgrove, "Design and Implementation of a Tunable 40 MHz-70 MHz Gm-C Bandpass Modulator.", IEEE Transaction on Circuits And Systems. II: Analog and Digital Signal Processing, vol. 44, no. 7, pp. 521-530, 1997.   DOI   ScienceOn
5 G. Raghavan, J. F. Jensen, J. Laskowski, M. Kardos, M. G. Case, M. Sokolich, and S.T. III, "Architecture, Design, and Test of Continuous time Tunable Intermediate-Frequency Bandpass Delta-Sigma Modulators", IEEE Journal of solid-state Circuits, vol. 36, no. 1, pp.5-13, 2001.   DOI   ScienceOn
6 Rusu, Delia Rodriuez de Llera Gonzalez, and Mohammed Ismail, "Reconfigurable ADCs Enable Smart Radios for 4G Wireless Connectivity", IEEE Circuits & Devices Magazine, May/June 2006.