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A Low-Noise Low-Power Chopper Amplifier With 130dB CMRR and High SNR | ||
مجله مهندسی برق دانشگاه تبریز | ||
دوره 54، شماره 3 - شماره پیاپی 109، آذر 1403، صفحه 347-353 اصل مقاله (1.21 M) | ||
نوع مقاله: علمی-پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/tjee.2024.58091.4699 | ||
نویسندگان | ||
مریم فرقانی1؛ حسن فرجی بگتاش* 2 | ||
1Faculty of Electrical Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran. | ||
2استاد/دانشگاه سهند تبریز | ||
چکیده | ||
This paper presents a low-power and low-noise chopper amplifier for biopotential signals. A two-stage structure is presented to achieve a high CMRR and SNR. These stages contain a folded cascode topology to obtain a low input noise and large input impedance; and a stage of two stacked cross-coupled folded cascode for CMRR and SNR intents. The structure consumes 1.27 µW from a 0.6 V power supply. The CMRR, SNR, Gain, and input-referred noise RMS respectively are 133 dB, 121.4 dB, 38 dB and 930nV/Hz in the Bandwidth of 0.01 kHz to 1 kHz. The NEF and PEF are 1.8 and 1.9 and input impedance is 2.5 GΩ with chopping frequency of 2kHz. | ||
کلیدواژهها | ||
Chopper amplifier؛ low noise؛ low power | ||
مراجع | ||
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