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a low-noise low-power chopper amplifier with 130db cmrr and high snr
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نویسنده
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forghani m. ,faraji baghtash h.
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منبع
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مهندسي برق دانشگاه تبريز - 1403 - دوره : 54 - شماره : 3 - صفحه:347 -353
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چکیده
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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.
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کلیدواژه
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chopper amplifier ,low noise ,low power
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آدرس
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sahand university of technology, faculty of electrical engineering, iran, sahand university of technology, faculty of electrical engineering, iran
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پست الکترونیکی
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hfaraji@sut.ac.ir
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a low-noise low-power chopper amplifier with 130db cmrr and high snr
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Authors
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forghani m. ,faraji baghtash h.
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Abstract
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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.
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Keywords
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chopper amplifier ,low noise ,low power
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