本文選題：放大器 + 腦電信號(hào)(EEG)�。� 參考：《半導(dǎo)體技術(shù)》2017年08期

【摘要】：為了滿足腦電信號(hào)(EEG)記錄陣列的應(yīng)用需求,設(shè)計(jì)了一種全差分的低噪聲、低功耗放大器電路。該電路利用亞閾值區(qū)晶體管作為偽電阻,與輸入電容和反饋電容形成高通通路,有效抑制了輸入信號(hào)的直流失調(diào)電壓,無需片外隔直電容,實(shí)現(xiàn)了電路的全集成。放大器中的跨導(dǎo)放大器(OTA)采用亞閾值晶體管進(jìn)行設(shè)計(jì),實(shí)現(xiàn)了較大的輸出擺幅、良好的功耗和噪聲性能。放大器電路采用SMIC 130 nm 1P8M混合信號(hào)工藝實(shí)現(xiàn),芯片面積0.6 mm~2。測試結(jié)果表明,在電源電壓0.6 V時(shí),放大器可處理信號(hào)帶寬為10 Hz~7 kHz,等效輸入噪聲的均方根值為3.976μV,噪聲有效因子為3.658,總功耗僅為2.4μW。
[Abstract]:In order to meet the requirements of EEG recording array, a fully differential low noise and low power amplifier circuit is designed. The circuit uses sub-threshold transistor as pseudoresistor and forms a high-pass path with input capacitance and feedback capacitance, which effectively restrains the DC offset voltage of input signal, and does not need the out-of-chip capacitance to realize the full integration of the circuit. The transconductance amplifier (OTA) in the amplifier is designed with sub-threshold transistor, which achieves large output swing, good power consumption and noise performance. The amplifier circuit is realized by SMIC 130nm 1P8M mixed signal technology. The chip area is 0.6 mm / 2. The test results show that when the power supply voltage is 0.6 V, the signal bandwidth is 10 Hz~7 kHz, the root mean square value of the equivalent input noise is 3.976 渭 V, the noise efficiency factor is 3.658, and the total power consumption is only 2.4 渭 W.
【作者單位】： 廈門理工學(xué)院光電與通信工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(61306039)
【分類號(hào)】：TN722.3

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