Title :
A 28-MHz wide-band switched-capacitor bandpass filter with high attenuation
Author :
Ng, Kenneth W H ; Luong, Howard C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Sci. & Technol., Kowloon, China
Abstract :
A 28 MHz switched-capacitor (SC) bandpass filter employs an N-path technique and implements transmission zeros in the transfer function to achieve both wide bandwidth and high attenuation. Implemented in a 0.35 μm CMOS process (VTP=0.82 V and VTN=0.65 V) and with a 3 V supply, the filter measures a center frequency of 28 MHz with a bandwidth of 3.84 MHz and a sampling frequency of 112 MHz. The filter achieves an IIP3 of 20 dBm while dissipating a power of 225 mW corresponding to 19.58 mW per pole and occupying a chip area of 1.65 mm2.
Keywords :
CMOS analogue integrated circuits; band-pass filters; integrated circuit design; radiofrequency filters; switched capacitor filters; 0.35 micron; 0.65 V; 0.82 V; 112 MHz; 19.58 mW; 225 mW; 28 MHz; 3 V; 3.84 MHz; CMOS; IIP3; N-path technique; bandpass filter; filter sampling frequency; high attenuation filter; switched-capacitor filter; transfer function transmission zeros; wide-band filter; Attenuation; Band pass filters; Bandwidth; CMOS process; Filtering theory; Frequency measurement; Sampling methods; Semiconductor device measurement; Transfer functions; Wideband;
Conference_Titel :
Custom Integrated Circuits Conference, 2003. Proceedings of the IEEE 2003
Print_ISBN :
0-7803-7842-3
DOI :
10.1109/CICC.2003.1249351
