Title :
A complex BPF with on chip auto-tuning architecture for wireless receivers
Author :
Chen, Fangxiong ; Ma, Heping ; Bei Chen ; Shi, Yin ; Lin, Min ; Jia, Hailong
Author_Institution :
Inst. of Semicond., Chinese Acad. of Sci., Beijing, China
Abstract :
A 3rd order complex band-pass filter (BPF) with auto-tuning architecture is proposed in this paper. It is implemented in 0.18 ¿m standard CMOS technology. The complex filter is centered at 4.092 MHz with bandwidth of 2.4 MHz. The in-band 3rd order harmonic input intercept point (IIP3) is larger than 16.2 dBm, with 50 ¿ as the source impedance. The input referred noise is about 80 uVrms. The RC tuning is based on binary search algorithm (BSA) with tuning accuracy of 3%. The chip area of the tuning system is 0.28 × 0.22 mm2, less than 1/8 of that of the main-filter which is 0.92 × 0.59 mm2. After tuning is completed, the tuning system will be turned off automatically to save power and to avoid interference. The complex filter consumes 2.6 mA with a 1.8 V power supply.
Keywords :
CMOS integrated circuits; band-pass filters; circuit tuning; radio receivers; search problems; CMOS technology; auto-tuning architecture; band-pass filter; bandwidth 2.4 MHz; binary search algorithm; current 2.6 mA; frequency 4.092 MHz; size 0.18 mum; source impedance; third order complex BPF; third order harmonic input; voltage 1.8 V; wireless receiver; Band pass filters; Bandwidth; CMOS technology; Capacitors; Circuit optimization; Frequency; Low pass filters; Resistors; Tuning; Voltage; BPF; CMOS; auto-tuning; complex filter; wireless systems;
Conference_Titel :
Communication Systems, 2008. ICCS 2008. 11th IEEE Singapore International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-2423-8
Electronic_ISBN :
978-1-4244-2424-5
DOI :
10.1109/ICCS.2008.4737423
