Title :
A 28-MHz wideband switched-capacitor bandpass filter with transmission zeros for high attenuation
Author :
Ng, Kenneth W H ; Luong, Howard C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China
fDate :
3/1/2005 12:00:00 AM
Abstract :
A 28-MHz wideband switched-capacitor (SC) bandpass filter employs an N-path technique and implements transmission zeros in the transfer function to achieve high attenuation. A modified SC biquadratic filter architecture is proposed to achieve high-speed operation. Implemented in a 0.35-μm CMOS process, the bandpass filter operates at 28-MHz center frequency with a 3.84-MHz bandwidth and adjacent-channel attenuation of more than 35 dB. At 3-V supply, the filter measures a dynamic range of 37 dB at the 1% THD3 point while dissipating 19.6-mW per pole and occupying a chip area of 1.65 mm2.
Keywords :
CMOS integrated circuits; band-pass filters; biquadratic filters; poles and zeros; switched capacitor filters; transfer functions; 0.35 micron; 19.6 mW; 28 MHz; 3 V; 3.84 MHz; AT-path technique; CMOS process; SC biquadratic filter; adjacent-channel attenuation; double sampling; high attenuation; high-speed operation; pseudo-N-path; transfer function; transmission zeros; wideband switched-capacitor bandpass filter; Area measurement; Attenuation; Band pass filters; Bandwidth; CMOS process; Filtering theory; Frequency; Semiconductor device measurement; Transfer functions; Wideband; Bandpass filter; double sampling; pseudo-; switched capacitor; transmission zero; wideband;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2005.843608
