FPAA研究及其在信号调理电路中的应用
发布时间：2019-05-28 14:21
【摘要】：受现场可编程门阵列FPGA(Field Programmable Gate Array)巨大成功的启发,一种现场可编程模拟阵列FPAA(Field Programmable Analog Array)的新型器件被开发出来。该类器件与FPGA类似,可根据现场的实际需要,通过数字编程改变器件的内部配置,从而实现所需要的模拟电路功能和参数调节。与传统的模拟电路设计相比,利用FPAA,配以合适的EDA(Electronic Design Automation)工具使得模拟电路的设计更简单、方便、快捷,并且能缩短产品的开发周期。这种电路设计方式在工业自动化、信号处理、无线电通信、仪器仪表、航空航天、人工神经网络、机器人等多种领域得到了广泛的应用,具有广阔的应用前景。FPAA主要由可编程模拟核心单元CAB(Configurable Analog Block)、互连网络、输入输出单元、配置数据存储器等组成。它有多种实现技术,基于连续时间的跨导运算技术是实现FPAA的主流技术之一,也是本文采用的实现方法。而智能信号调理是信息科学的一个研究热点,基于FPAA的信号调理电路改变了传统信号调理电路功能单一、参数不可调的缺点,更能适应于当今复杂的工程需求。因此,本文对利用线性跨导可调POTA实现的FPAA进行了研究,并探讨了其在信号调理电路中的应用。论文主要有以下研究工作:1)针对OTA线性范围窄、跨导不可调的缺点,设计了基于信号衰减技术和交叉耦合技术的两种不同类型的线性范围更宽、跨导可调的POTA,并对二者进行了分析比较,得出后者性能更好,并将其作为基础单元应用于后续FPAA单元电路及FPAA阵列设计中。2)FPAA一般通过可编程开关电容矩阵来实现参数的可调节,为了减少其中的寄生电容对电容矩阵的影响,设计了一种基于POTA的可编程电容倍增电路,它能够减少开关的使用,降低了寄生参数的影响,同时简化了电路结构,更易集成。并以此为基础结合POTA搭建了一个FPAA的核心单元CAB电路。3)将上述设计的多个CAB电路用六边形互连网络、可编程开关以及开关共享技术连接起来,形成了一个FPAA阵列。与传统的FPAA阵列相比,该阵列结构简单,便于集成,且减少了开关数量和开关噪声的影响,提高了电路的性能。4)采用设计的FPAA实现了一种新的信号调理电路。具体利用FPAA设计了增益可调电路、通用高阶滤波器、D/A转换器三种常见的信号调理电路来进行举例说明,并对它们进行了仿真与验证,结果表明在该FPAA阵列上可通过数字可编程来实现相对应的信号调理功能,有很强的灵活性和适应能力。
[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.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN791
本文编号：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.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN791
【参考文献】
相关期刊论文 前2条
1 骆震波;;基于可编程芯片的信号调理电路设计[J];科技广场;2011年11期
2 李志军;王春华;刘荣;;任意电流模式滤波器的综合实现[J];通信学报;2010年08期
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