Title :
A low frequency low pass filter based on R2R-differnce term-combined-approach
Author :
Mahnashi, Yaqub ; Alzaher, Hussain ; Tasadduq, Noman
Author_Institution :
Electr. Eng. Dept., King Fahd Univ. of Pet. & Miner., Dhahran, Saudi Arabia
Abstract :
Real time continuous low frequency filters are difficult to be integrated using Active-RC structure due to the large constant time and hence large resistors and/or capacitors. A new approach based on combining R2R ladder and difference term approach to realize low pass filter is proposed. In this approach a low power performance is achieved as number of R2R ladder networks are relaxed. The proposed filter was designed and simulated in 0.18,. CMOS technology by Tanner tools. A comparison between the proposed design and some related work in the literature is made. The filter with a pole of 150Hz which is suitable for ECG system consumes only 4.52 μW from ±0.65 V and achieving total harmonic distortion of -73dB.
Keywords :
CMOS integrated circuits; low-pass filters; low-power electronics; CMOS technology; R2R ladder; R2R-difference term-combined-approach; active-RC structure; difference term approach; frequency 150 Hz; harmonic distortion; low frequency low pass filter; power 4.52 muW; size 0.18 micron; BiCMOS integrated circuits; CMOS integrated circuits; CMOS technology; Electrocardiography; Frequency measurement; Instruments; Switches; 0.18µ CMOS technology; Active-RC; ECG system; R2R ladder; Real time continuous low frequency filters;
Conference_Titel :
Technological Advances in Electrical, Electronics and Computer Engineering (TAEECE), 2013 International Conference on
Conference_Location :
Konya
Print_ISBN :
978-1-4673-5612-1
DOI :
10.1109/TAEECE.2013.6557195
