Title :
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
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 mVpp 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;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.922255
