本文關(guān)鍵詞：低功耗復(fù)數(shù)濾波器設(shè)計　出處：《東南大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 頻率校準 復(fù)數(shù)濾波器 低功耗濾波器 低中頻

【摘要】：復(fù)數(shù)濾波器作為射頻接收機的重要組成部分,實現(xiàn)有用信道的選擇和鏡像信號的抑制,其功耗和頻率特性對接收機鏈路的信號質(zhì)量有重要影響。通過提高電流效率和降低電源電壓是實現(xiàn)低功耗復(fù)數(shù)濾波器的兩種重要手段,是當(dāng)前的主要研究方向。論文介紹了復(fù)數(shù)濾波器的應(yīng)用背景,總結(jié)了低功耗復(fù)數(shù)濾波器的國內(nèi)外研究現(xiàn)狀,推導(dǎo)了復(fù)數(shù)濾波器的基本傳輸函數(shù),得到了復(fù)數(shù)濾波器的系統(tǒng)框圖,基于系統(tǒng)框圖,設(shè)計了一種低功耗的復(fù)數(shù)濾波器。這種濾波器通過單個放大器實現(xiàn)2個極點,從而減少了有源模塊數(shù)量,提高了電流效率。通過對相關(guān)設(shè)計方程式的推導(dǎo)和分析,優(yōu)化了該低功耗的系統(tǒng)拓撲。為了進一步降低上述復(fù)數(shù)濾波器的功耗,論文中采用了一種基于主-從思想的低電壓放大器作為復(fù)數(shù)濾波器的基本單元,這種單元的尾電流源雖然在線性區(qū),但是利用反饋的方式實現(xiàn)了線性區(qū)的恒流特性,從而在具有一定共模抑制能力的情況下,節(jié)省了電源到地之間的電壓裕度,從而可使復(fù)試濾波器工作在低電壓下,大幅降低了該復(fù)數(shù)濾波器的功耗。為了簡化復(fù)數(shù)濾波器系統(tǒng),并且節(jié)省功耗,設(shè)計的復(fù)數(shù)濾波器采用傳統(tǒng)的手動校準的方式。論文設(shè)計的帶頻率校準的低功耗濾波器采用TSMC0.13μmRFCMOS工藝,進行了 MPW流片,模塊面積為0.24mm2。測試結(jié)果表明,該四階低功耗復(fù)數(shù)帶通濾波器在0.7V電源電壓下消耗了 0.5mA的電流,實現(xiàn)的增益為8.1dB,中心頻率在1.68MHz,帶寬為0.9MHz,鏡像抑制比為18.33dB,帶內(nèi)ⅡP3為-9.41dBm。
[Abstract]:As an important part of RF receiver, complex filter realizes the selection of useful channel and the suppression of mirror signal. Its power consumption and frequency characteristics have an important impact on the signal quality of the receiver link. Improving the current efficiency and reducing the power supply voltage are two important means to realize low power complex filter. This paper introduces the application background of complex filter, summarizes the research status of low power complex filter at home and abroad, and deduces the basic transmission function of complex filter. The system block diagram of the complex filter is obtained. Based on the system diagram, a low power consumption complex filter is designed. This filter achieves two poles through a single amplifier, thus reducing the number of active modules. Through the derivation and analysis of the related design equations, the low power system topology is optimized. In order to further reduce the power consumption of the complex filter mentioned above. In this paper, a kind of low-voltage amplifier based on master-slave thought is used as the basic unit of complex filter. The tail current source of this unit is in the linear region. But the constant current characteristic of linear region is realized by the way of feedback, thus the voltage margin between power supply and ground can be saved under the condition of certain common mode suppression ability. Thus, the power consumption of the complex filter can be greatly reduced by making the retrial filter operate at a low voltage.; in order to simplify the complex filter system, and save the power consumption. The complex filter is designed by the traditional manual calibration method. The low power filter with frequency calibration is designed using TSMC0.13 渭 mRFCMOS process, and the MPW wafer is carried out. The module area is 0.24mm2.The test results show that the four-order low-power complex band-pass filter consumes 0.5mA current at 0.7V supply voltage and achieves a gain of 8.1 dB. The center frequency is 1.68 MHz, the bandwidth is 0.9MHz, the mirror rejection ratio is 18.33 dB, and the in-band 鈪，

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