低噪聲低功耗3階復(fù)數(shù)濾波器的設(shè)計
2021年電子技術(shù)應(yīng)用第9期
張旭東1,雷倩倩1,張芳玲1,李 弦2,李連碧1
1.西安工程大學(xué) 理學(xué)院,陜西 西安710000;2.深圳市紐瑞芯科技有限公司,廣東 深圳518000
摘要: 采用UMC 40 nm CMOS工藝,設(shè)計了一款低噪聲低功耗的3階復(fù)數(shù)濾波器。利用FLFB(Follow-the-Leader-Feedback)結(jié)構(gòu)良好的噪聲特性,并以勞斯-霍爾維茨穩(wěn)定性判據(jù)為理論依據(jù),采用相位裕度僅為36.8°的運放,達(dá)到低噪聲低功耗的優(yōu)化目的。仿真結(jié)果表明:濾波器的帶寬可調(diào)范圍為0.98~1.92 MHz,中心頻率0.68~1.34 MHz可調(diào),通帶內(nèi)噪聲90.6 μV,無雜散動態(tài)范圍73.7 dB,鏡像抑制比28.4 dB,此時總功耗為1.33 mW。
中圖分類號: TN713
文獻(xiàn)標(biāo)識碼: A
DOI:10.16157/j.issn.0258-7998.211278
中文引用格式: 張旭東,雷倩倩,張芳玲,等. 低噪聲低功耗3階復(fù)數(shù)濾波器的設(shè)計[J].電子技術(shù)應(yīng)用,2021,47(9):30-34.
英文引用格式: Zhang Xudong,Lei Qianqian,Zhang Fangling,et al. Design of low-noise low-power 3rd complex filter[J]. Application of Electronic Technique,2021,47(9):30-34.
文獻(xiàn)標(biāo)識碼: A
DOI:10.16157/j.issn.0258-7998.211278
中文引用格式: 張旭東,雷倩倩,張芳玲,等. 低噪聲低功耗3階復(fù)數(shù)濾波器的設(shè)計[J].電子技術(shù)應(yīng)用,2021,47(9):30-34.
英文引用格式: Zhang Xudong,Lei Qianqian,Zhang Fangling,et al. Design of low-noise low-power 3rd complex filter[J]. Application of Electronic Technique,2021,47(9):30-34.
Design of low-noise low-power 3rd complex filter
Zhang Xudong1,Lei Qianqian1,Zhang Fangling1,Li Xian2,Li Lianbi1
1.School of Science,Xi′an Polytechnic University,Xi′an 710000,China;2.NewRadio Tech,Shenzhen 518000,China
Abstract: his paper presents a low-noise low-power third-order complex filter in UMC 40 nm CMOS technology. Based on follow-the-leader-feedback architecture inherently noise figure and routh-hurwitz stability criteria, the phase margin is designed in merely 36.8 deg of operational amplifier, achieving the low-noise low-power optimization. Simulation results show that the bandwidth is adjustable for 0.98~1.92 MHz, center frequency is adjustable for 0.68~1.34 MHz, the noise in-band is 90.6 ?滋V, spurious-free dynamic ranges is 73.7 dB, image rejection radio is 28.4 dB, and the total power consumption is 1.33 mW.
Key words : complex filter;low noise;low power;stability criteria
0 引言
在低中頻接收機中,常采用復(fù)數(shù)濾波器來抑制混頻過程中產(chǎn)生的鏡像信號[1-3]。復(fù)數(shù)濾波器一般以低通濾波器為基礎(chǔ),通過交叉通路,使得對稱軸頻移jω0,由原先以j軸為對稱的低通濾波器,變?yōu)橐驭?為中心頻率的帶通濾波器,形成了以j軸非對稱濾波的效果,達(dá)到選擇有用信號而抑制鏡像信號的目的[4-5]。
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作者信息:
張旭東1,雷倩倩1,張芳玲1,李 弦2,李連碧1
(1.西安工程大學(xué) 理學(xué)院,陜西 西安710000;2.深圳市紐瑞芯科技有限公司,廣東 深圳518000)
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