【摘要】：隨著經(jīng)濟(jì)的發(fā)展和人們對生活質(zhì)量的要求不斷提高,生活智能化將會是人們高質(zhì)量生活的必然趨勢。在國家“十二五規(guī)劃”號召下,智能家居市場迎來了發(fā)展的契機(jī),但智能家居中的傳感器以及其他子系統(tǒng)一直受電池使用壽命的制約,采用新能源和延長電池使用壽命是解決智能家居中頻繁更換電池的有效方案。由于電荷泵系統(tǒng)具有對電源電壓要求低、轉(zhuǎn)換效率高以及噪聲低的特點,運(yùn)用在新能源的電壓轉(zhuǎn)換以及延長電池使用壽命上具有實際意義。本課題基于SMIC 55nm CMOS工藝,針對上述兩種方案設(shè)計了兩種電荷泵系統(tǒng)。在采用新能源的方案中,由于新能源電池的輸出電壓低,一般僅有0.3V到0.6V,對于普通的升壓電路無法實現(xiàn)功率管的導(dǎo)通,本文設(shè)計了由環(huán)形振蕩器、非交疊時鐘電路、電荷泵功率級構(gòu)成的電荷泵升壓系統(tǒng)實現(xiàn)低壓到高壓的轉(zhuǎn)換,驅(qū)動升壓系統(tǒng)的功率管；在延長電池使用壽命方案中,本課題設(shè)計了一款全集成的電荷泵升壓系統(tǒng)。該系統(tǒng)采用脈沖跳變調(diào)制方式,實現(xiàn)穩(wěn)定的輸出電壓。為了提高電荷泵的功率轉(zhuǎn)換效率,本課題設(shè)計了低壓低功耗的電壓基準(zhǔn)電路以及遲滯比較器。在Cadence軟件環(huán)境下實現(xiàn)電路的前端設(shè)計、版圖設(shè)計以及后仿驗證。結(jié)果表明：本課題設(shè)計的低壓應(yīng)用電荷泵可以在電源電壓為0.3V下實現(xiàn)1.15V的輸出電壓,上升時間僅需21μs,系統(tǒng)功耗為16.8μA,泵效率可以達(dá)到95%；設(shè)計的全集成高效電荷泵系統(tǒng)可以在0.7V到0.9V的電源電壓下,實現(xiàn)穩(wěn)定的1.2V輸出電壓,紋波小于0.1V,僅用了5nF的電容在0.8V電源電壓下可以提供1.1mA的負(fù)載電流,電荷泵系統(tǒng)的最大效率可以達(dá)到73%。本課題設(shè)計的電荷泵滿足設(shè)計指標(biāo)的要求,可以應(yīng)用在智能家居中的DC/DC電壓轉(zhuǎn)換方面。
[Abstract]:With the development of economy and the improvement of people's quality of life, life intelligence will be the inevitable trend of high quality life. Under the call of the 12th Five-Year Plan, the smart home market has ushered in the opportunity of development, but sensors and other subsystems in the smart home have been restricted by the battery life. Using new energy and prolonging battery life is an effective way to solve the problem of frequent battery replacement in smart home. Because the charge pump system has the characteristics of low power supply voltage, high conversion efficiency and low noise, it has practical significance in voltage conversion of new energy sources and prolongation of battery life. Based on SMIC 55nm CMOS process, two charge pump systems are designed for the above two schemes. In the scheme of adopting new energy, because the output voltage of the new energy battery is low, it is generally only 0.3V to 0.6V, for the ordinary boost circuit can not realize the conduction of power transistor, this paper designs the ring oscillator, non-overlapping clock circuit. The charge pump booster system composed of the charge pump power level realizes the conversion from low pressure to high pressure and drives the power tube of the booster system. In the project of prolonging battery life, a fully integrated charge pump booster system is designed. The system adopts pulse jump modulation to realize stable output voltage. In order to improve the power conversion efficiency of charge pump, a low voltage and low power consumption voltage reference circuit and hysteresis comparator are designed. The front-end design, layout design and post-imitation verification of the circuit are realized in the Cadence software environment. The results show that the low voltage application charge pump designed in this paper can realize the output voltage of 1.15V at 0.3V supply voltage, the rising time is only 21 渭 s, the power consumption of the system is 16.8 渭 A. the pump efficiency can reach 95V; The designed fully integrated and efficient charge pump system can achieve stable 1.2 V output voltage with ripple less than 0.1 V under 0.7 V to 0.9 V power supply voltage. Only the capacitance of 5nF can provide the load current of 1.1mA at 0.8 V supply voltage, and the maximum efficiency of charge pump system can reach 7375%. The charge pump designed in this paper can meet the requirements of design index and can be applied to DC/DC voltage conversion in smart home.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TM46

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本文編號：2314011