Title :
A low-power low-noise 600MHz CMOS IF demodulator for superheterodyne receivers
Author :
Jihua, Zheng ; Yongming, Li ; Hongyi, Chen
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
A low-power low-noise Intermediate Frequency (IF) to baseband receiving chain (demodulator) for superheterodyne receivers fabricated in a 0.18-μm CMOS technology is presented. Due to introducing a new variable gain amplifier, the demodulator extends its operation frequency up to 600MHz, while maintaining high dynamic range of 70dB and low power consumption of 25mA. Simulations and measurements show the gain control range is -2-68dB; the noise figure (NF) is 7.6dB-50dB, and the IIP3 is -40dBm∼20dBm. The chip occupies 0.5 mm2.
Keywords :
CMOS analogue integrated circuits; demodulators; low-power electronics; superheterodyne receivers; -2 to 68 dB; 0.18 micron; 25 mA; 600 MHz; 7.6 to 50 dB; CMOS; IF demodulator; IF to baseband receiving chain; IIP3; dynamic range; operation frequency; power consumption; superheterodyne receivers; variable gain amplifier; Baseband; CMOS technology; Demodulation; Dynamic range; Energy consumption; Frequency; Gain; High power amplifiers; Noise measurement; Operational amplifiers;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205564
