FPAA研究及其在信號調(diào)理電路中的應(yīng)用
發(fā)布時間：2019-05-28 14:21
【摘要】：受現(xiàn)場可編程門陣列FPGA(Field Programmable Gate Array)巨大成功的啟發(fā),一種現(xiàn)場可編程模擬陣列FPAA(Field Programmable Analog Array)的新型器件被開發(fā)出來。該類器件與FPGA類似,可根據(jù)現(xiàn)場的實際需要,通過數(shù)字編程改變器件的內(nèi)部配置,從而實現(xiàn)所需要的模擬電路功能和參數(shù)調(diào)節(jié)。與傳統(tǒng)的模擬電路設(shè)計相比,利用FPAA,配以合適的EDA(Electronic Design Automation)工具使得模擬電路的設(shè)計更簡單、方便、快捷,并且能縮短產(chǎn)品的開發(fā)周期。這種電路設(shè)計方式在工業(yè)自動化、信號處理、無線電通信、儀器儀表、航空航天、人工神經(jīng)網(wǎng)絡(luò)、機器人等多種領(lǐng)域得到了廣泛的應(yīng)用,具有廣闊的應(yīng)用前景。FPAA主要由可編程模擬核心單元CAB(Configurable Analog Block)、互連網(wǎng)絡(luò)、輸入輸出單元、配置數(shù)據(jù)存儲器等組成。它有多種實現(xiàn)技術(shù),基于連續(xù)時間的跨導(dǎo)運算技術(shù)是實現(xiàn)FPAA的主流技術(shù)之一,也是本文采用的實現(xiàn)方法。而智能信號調(diào)理是信息科學(xué)的一個研究熱點,基于FPAA的信號調(diào)理電路改變了傳統(tǒng)信號調(diào)理電路功能單一、參數(shù)不可調(diào)的缺點,更能適應(yīng)于當(dāng)今復(fù)雜的工程需求。因此,本文對利用線性跨導(dǎo)可調(diào)POTA實現(xiàn)的FPAA進行了研究,并探討了其在信號調(diào)理電路中的應(yīng)用。論文主要有以下研究工作:1)針對OTA線性范圍窄、跨導(dǎo)不可調(diào)的缺點,設(shè)計了基于信號衰減技術(shù)和交叉耦合技術(shù)的兩種不同類型的線性范圍更寬、跨導(dǎo)可調(diào)的POTA,并對二者進行了分析比較,得出后者性能更好,并將其作為基礎(chǔ)單元應(yīng)用于后續(xù)FPAA單元電路及FPAA陣列設(shè)計中。2)FPAA一般通過可編程開關(guān)電容矩陣來實現(xiàn)參數(shù)的可調(diào)節(jié),為了減少其中的寄生電容對電容矩陣的影響,設(shè)計了一種基于POTA的可編程電容倍增電路,它能夠減少開關(guān)的使用,降低了寄生參數(shù)的影響,同時簡化了電路結(jié)構(gòu),更易集成。并以此為基礎(chǔ)結(jié)合POTA搭建了一個FPAA的核心單元CAB電路。3)將上述設(shè)計的多個CAB電路用六邊形互連網(wǎng)絡(luò)、可編程開關(guān)以及開關(guān)共享技術(shù)連接起來,形成了一個FPAA陣列。與傳統(tǒng)的FPAA陣列相比,該陣列結(jié)構(gòu)簡單,便于集成,且減少了開關(guān)數(shù)量和開關(guān)噪聲的影響,提高了電路的性能。4)采用設(shè)計的FPAA實現(xiàn)了一種新的信號調(diào)理電路。具體利用FPAA設(shè)計了增益可調(diào)電路、通用高階濾波器、D/A轉(zhuǎn)換器三種常見的信號調(diào)理電路來進行舉例說明,并對它們進行了仿真與驗證,結(jié)果表明在該FPAA陣列上可通過數(shù)字可編程來實現(xiàn)相對應(yīng)的信號調(diào)理功能,有很強的靈活性和適應(yīng)能力。
[Abstract]:Inspired by the great success of field programmable gate array FPGA (Field Programmable Gate Array), a new device of field programmable analog array FPAA (Field Programmable Analog Array) has been developed. Similar to FPGA, this kind of device can change the internal configuration of the device through digital programming according to the actual needs of the field, so as to realize the required analog circuit function and parameter adjustment. Compared with the traditional analog circuit design, using FPAA, with appropriate EDA (Electronic Design Automation) tools makes the design of analog circuit simpler, more convenient, faster, and can shorten the development cycle of the product. This circuit design method has been widely used in many fields, such as industrial automation, signal processing, radio communication, instrumentation, aerospace, artificial neural network, robot and so on. FPAA has a broad application prospect. FPAA is mainly composed of programmable analog core unit CAB (Configurable Analog Block), interconnection network, input and output unit, configuration data memory and so on. It has many implementation technologies. Transderivative operation technology based on continuous time is one of the mainstream technologies to realize FPAA, and it is also the implementation method used in this paper. Intelligent signal conditioning is a hot research topic in information science. The signal conditioning circuit based on FPAA changes the shortcomings of the traditional signal conditioning circuit that the function of the traditional signal conditioning circuit is single and the parameters can not be adjusted, so it can better adapt to the complex engineering requirements. Therefore, the FPAA realized by linear transconductive adjustable POTA is studied in this paper, and its application in signal conditioning circuit is discussed. The main research work of this paper is as follows: 1) aiming at the shortcomings of narrow linear range and unadjustable transconductivity, two different types of POTA, based on signal attenuation technology and cross-coupling technology are designed, which have wider linear range and adjustable transconductivity. By analyzing and comparing the two, it is concluded that the latter has better performance, and it is applied as the basic unit to the subsequent FPAA cell circuit and FPAA array design. 2) FPAA generally realizes the adjustable parameters through the programmable switching capacitor matrix. In order to reduce the influence of parasitic capacitance on capacitance matrix, a programmable capacitor multiplier circuit based on POTA is designed, which can reduce the use of switches, reduce the influence of parasitic parameters, simplify the circuit structure and make it easier to integrate. On this basis, a core unit CAB circuit of FPAA is built with POTA. 3) several CAB circuits designed above are connected by hexagonal interconnection network, programmable switch and switch sharing technology, and a FPAA array is formed. Compared with the traditional FPAA array, the array is simple in structure, easy to integrate, reduces the number of switches and the influence of switching noise, and improves the performance of the circuit. 4) A new signal conditioning circuit is implemented by using the designed FPAA. Three common signal conditioning circuits, gain adjustable circuit, general high-order filter and D / A converter, are designed by using FPAA to illustrate them, and they are simulated and verified. The results show that the corresponding signal conditioning function can be realized by digital programmable on the FPAA array, and it has strong flexibility and adaptability.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN791
本文編號：2487130
[Abstract]:Inspired by the great success of field programmable gate array FPGA (Field Programmable Gate Array), a new device of field programmable analog array FPAA (Field Programmable Analog Array) has been developed. Similar to FPGA, this kind of device can change the internal configuration of the device through digital programming according to the actual needs of the field, so as to realize the required analog circuit function and parameter adjustment. Compared with the traditional analog circuit design, using FPAA, with appropriate EDA (Electronic Design Automation) tools makes the design of analog circuit simpler, more convenient, faster, and can shorten the development cycle of the product. This circuit design method has been widely used in many fields, such as industrial automation, signal processing, radio communication, instrumentation, aerospace, artificial neural network, robot and so on. FPAA has a broad application prospect. FPAA is mainly composed of programmable analog core unit CAB (Configurable Analog Block), interconnection network, input and output unit, configuration data memory and so on. It has many implementation technologies. Transderivative operation technology based on continuous time is one of the mainstream technologies to realize FPAA, and it is also the implementation method used in this paper. Intelligent signal conditioning is a hot research topic in information science. The signal conditioning circuit based on FPAA changes the shortcomings of the traditional signal conditioning circuit that the function of the traditional signal conditioning circuit is single and the parameters can not be adjusted, so it can better adapt to the complex engineering requirements. Therefore, the FPAA realized by linear transconductive adjustable POTA is studied in this paper, and its application in signal conditioning circuit is discussed. The main research work of this paper is as follows: 1) aiming at the shortcomings of narrow linear range and unadjustable transconductivity, two different types of POTA, based on signal attenuation technology and cross-coupling technology are designed, which have wider linear range and adjustable transconductivity. By analyzing and comparing the two, it is concluded that the latter has better performance, and it is applied as the basic unit to the subsequent FPAA cell circuit and FPAA array design. 2) FPAA generally realizes the adjustable parameters through the programmable switching capacitor matrix. In order to reduce the influence of parasitic capacitance on capacitance matrix, a programmable capacitor multiplier circuit based on POTA is designed, which can reduce the use of switches, reduce the influence of parasitic parameters, simplify the circuit structure and make it easier to integrate. On this basis, a core unit CAB circuit of FPAA is built with POTA. 3) several CAB circuits designed above are connected by hexagonal interconnection network, programmable switch and switch sharing technology, and a FPAA array is formed. Compared with the traditional FPAA array, the array is simple in structure, easy to integrate, reduces the number of switches and the influence of switching noise, and improves the performance of the circuit. 4) A new signal conditioning circuit is implemented by using the designed FPAA. Three common signal conditioning circuits, gain adjustable circuit, general high-order filter and D / A converter, are designed by using FPAA to illustrate them, and they are simulated and verified. The results show that the corresponding signal conditioning function can be realized by digital programmable on the FPAA array, and it has strong flexibility and adaptability.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN791
【參考文獻】
相關(guān)期刊論文 前2條
1 駱震波;;基于可編程芯片的信號調(diào)理電路設(shè)計[J];科技廣場;2011年11期
2 李志軍;王春華;劉榮;;任意電流模式濾波器的綜合實現(xiàn)[J];通信學(xué)報;2010年08期
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