Title :
A high-Q and wide-dynamic-range 70 MHz CMOS bandpass filter for wireless receivers
Author :
Choi, Y.W. ; Luong, Howard C.
Author_Institution :
Hong Kong Univ. of Sci. & Technol., Kowloon, China
fDate :
5/1/2001 12:00:00 AM
Abstract :
Design of a sixth-order CMOS high-Q Gm-C bandpass filter with automatic tuning for channel selection in wireless receivers is presented. A linearized transconductance (Gm) cell is designed and optimized for both noise and linearity. The Gm cells of the biquads and of the tuning circuitry are implemented using unit-Gm cells for better matching and less power consumption. The filter prototype achieves a measured bandwidth of 200 kHz at 70 MHz (Q=350). The measured input equivalent noise is 81 nV/√Hz and the IIP3 is -10 dBm, which corresponds to a dynamic range of about 66 dB. At 2.5 V, the total power consumption is 120 mW
Keywords :
CMOS analogue integrated circuits; Q-factor; band-pass filters; biquadratic filters; circuit tuning; radio receivers; 120 mW; 2.5 V; 200 kHz; 70 MHz; CMOS bandpass filter; IIP3; automatic tuning; bandwidth; biquads; channel selection; dynamic range; high-Q Gm-C bandpass filter; input equivalent noise; linearized transconductance; power consumption; total power consumption; tuning circuitry; wireless receivers; Band pass filters; Bandwidth; Circuit noise; Circuit optimization; Design optimization; Energy consumption; Linearity; Noise measurement; Prototypes; Transconductance;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
