【摘要】：為了解決可穿戴脈搏血氧檢測芯片濾波器面積大、功耗高的問題,改進(jìn)設(shè)計了一個三階巴特沃斯G_mC低通濾波器.線性跨導(dǎo)器采用源極負(fù)反饋結(jié)構(gòu)來增大線性范圍,并且輸入管工作在亞閾值區(qū)降低了功耗,然后通過密勒效應(yīng)放大電容來減小面積;同時,該濾波器通過開關(guān)電容調(diào)諧電路調(diào)制濾波器的截止頻率,降低工藝偏差.仿真結(jié)果表明:在SMIC 0.18μm CMOS工藝,1.8V電源電壓供電下,該低通濾波器的截止頻率為7.9Hz,面積為0.14mm~2,功耗為6.7μW,相比其他的設(shè)計方案,在功耗和面積上都有大幅優(yōu)化.
[Abstract]:In order to solve the problem of large area and high power consumption of wearable pulse oximeter chip filter, an improved third-order Butterworth G_mC low-pass filter is designed. The linear transconductors use the source negative feedback structure to increase the linear range, and the input tube works in the sub-threshold region to reduce the power consumption, and then uses the Miller effect to amplify the capacitance to reduce the area. At the same time, the cut-off frequency of the filter is modulated by switched capacitor tunable circuit, and the process deviation is reduced. The simulation results show that under the SMIC 0.18 渭 m CMOS technology and 1.8 V power supply, the cut-off frequency of the low-pass filter is 7.9 Hz, the area is 0.14 mm / 2, and the power consumption is 6.7 渭 W, compared with other design schemes. There are significant optimizations in power consumption and area.
【作者單位】： 華中科技大學(xué)光學(xué)與電子信息學(xué)院;武漢工程大學(xué)電氣信息學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(61006028) 科技部科技型中小企業(yè)技術(shù)創(chuàng)新基金資助項目(14C26214422753) 湖北省重大科技資助項目(2015ACA063) 中央高校基本科研業(yè)務(wù)費(fèi)資助項目(2014TS041)
【分類號】：TN713.4

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