Design of Current-Mode Square-Root Domain Band-Pass Filter with Reduced Voltage

Authors:
Gwo-Jeng Yu;Chun-Yueh Huang;Jenn-Jiun Chen;Bin-Da Liu
Affiliations:
Department of Electrical Engineering, National Cheng Kung University, Tainan, Republic of China 70101;Department of Electronic Engineering, Kun Shan University of Technology, Tainan, Republic of China 71003;Department of Electrical Engineering, National Cheng Kung University, Tainan, Republic of China 70101;Department of Electrical Engineering, National Cheng Kung University, Tainan, Republic of China 70101
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2005

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Abstract

A design technique for current-mode square-root domain band-pass filter fabricated in a 0.25 驴 m CMOS process is presented. The basic building block consists of current-mode current mirrors, square-root circuits and capacitors, and in which the overall supply voltage is reduced by adopting low-voltage level-shift current mirror. Both of the simulation and measured results, which are in good agreement, indicate that the prototype of the band-pass provides tunable center frequency of 4---10 MHz with bias-current-tunable, 驴26.7 dB total harmonic distortion (THD), and approximately 1.598 mW power dissipation with a 1.5 V supply voltage. Advantages of the proposed filter include high frequency operation, tuneability, low supply voltage operation, low power consumption, and low third order intermodulation distortion.