Title :
High-Q CMOS LC pseudo switched-capacitor bandpass filter with center frequency tuning
Author :
El Oualkadi, Ahmed ; Cordeau, David ; Paillot, Jean-Marie
Author_Institution :
Dept. of Electr. Eng., Univ. Catholique de Louvain, Louvain-la-Neuve
Abstract :
The design of a new high-Q LC pseudo switched-capacitor bandpass filter is presented. The proposed filter is tuned by using a command circuit made up by a ring voltage controlled oscillator (VCO) with ´XOR´ gates. Fabricated in a standard 0.35 mum CMOS, this circuit is intended to replace the SAW filters in wireless broadband applications. Measured results demonstrate interesting performances; a tunable center frequency range of 285 MHz [240-525 MHz] and a quality factor that can be as high as 300 within the tunable frequency range
Keywords :
CMOS integrated circuits; UHF filters; VHF filters; band-pass filters; circuit tuning; logic gates; switched capacitor filters; voltage-controlled oscillators; 0.35 micron; 240 to 525 MHz; CMOS bandpass filter; CMOS integrated circuit; LC bandpass filter; XOR gates; center frequency tuning; high-Q bandpass filter; pseudoswitched-capacitor bandpass filter; ring VCO; ring voltage controlled oscillator; wireless broadband applications; Band pass filters; Circuit optimization; Frequency measurement; Performance evaluation; Q factor; SAW filters; Tunable circuits and devices; Tuned circuits; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693482
