A low power monolithic AGC with automatic DC offset cancellation for direct conversion hybrid CDMA transceiver used in telemetering

Author

Hung Yan Cheung ; Cheung, Hung Yan ; Lau, Jack

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China

Volume

4

fYear

2001

fDate

6-9 May 2001

Firstpage

390

Abstract

The monolithic integration can be made possible with the advantages of direct conversion techniques. However, DC offset and flicker noise become critical to the system. In this paper we propose a wide tuning range AGC with an effective automatic DC offset cancellation. The proposed AGC is specifically designed for direct conversion hybrid CDMA system operating at 2.4 GHz used in telemetering applications. The AGC was fabricated using TSMC 0.35 um double poly process. The circuit achieves a 80 dB continuous gain tuning range, [-30 dB, 50 dB], with 40 dB dynamic range for differential output voltage set to 500 mV_pp and a THD better than 30 dBc. The AGC is powered by 3 V with 7 mW power consumption

Keywords

automatic gain control; code division multiple access; low-power electronics; radiotelemetry; transceivers; 0.35 micron; 2.4 GHz; 3 V; 7 mW; THD; TSMC double poly process; automatic DC offset cancellation; continuous gain tuning range; direct conversion hybrid CDMA transceiver; dynamic range; flicker noise; low-power AGC; monolithic integration; telemetry; 1f noise; Circuit optimization; Detectors; Dynamic range; Energy consumption; Filters; Gain control; Multiaccess communication; Transceivers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on

Conference_Location

Sydney, NSW

Print_ISBN

0-7803-6685-9

Type

conf

DOI

10.1109/ISCAS.2001.922255

Filename

922255