基于有源器件的全集成连续时间滤波器的研究

发布时间：2018-08-03 21:55

【摘要】：随着第四代通信技术(4G)的普遍推广和第五代通信技术(5G)的研究发展,人们对移动通信系统的性能要求不断变高。滤波器作为移动通信系统中对信号波形剔除各种信号噪声干扰、提取有效频段的重要模块,滤波器的性能要求也不断提升。同时,随着信息时代的不断推进和超大规模集成电路(VLSI)的发展,晶体管均集成到一块小芯片上来满足系统集成度的要求,用MOS电路来实现的各种器件和基本模块以及用MOS电路来实现滤波器电路得到了广泛的关注。因此,滤波器向着带宽更高、集成度更高、处理速度更快、灵敏度更小、电路损耗更低以及电路结构更为简单的方向发展。而利用通用有源器件的高集成度、高频带、高速度、低电压摆幅、低阻抗的性能可以很好的满足滤波器的高性能要求,使得滤波器可以更好的应用于现代通信系统当中。全集成连续时间滤波器可以直接对模拟信号进行处理,省略了A/D、D/A转换、保持、采样以及抗混叠滤波器,避免时钟馈入的影响,同时跨导运算放大器和电流传送器是最重要的通用有源器件之一。因此,应用跨导运算放大器和电流传送器实现的全集成连续时间滤波器很多,到目前为止,应用跨导运算放大器和电流传送器的连续时间滤波器可以分为四类:以模拟划分,分为电压模式、电流模式和混合模式;以阶数划分,分为低阶和高阶;以实现方式划分,分为直接设计方法和间接设计方法;以输入输出的个数划分,分为单输入单输出、单输入多输出、多输入单输出、多输入多输出。本文系统地研究了跨导运算放大器和电流传送器的电路原理、CMOS电路结构与特性及其全集成连续时间滤波器和模拟乘法器的设计方法。首先,根据多输出差动差分电流传送器的特性,提出了基于多输出差动差分电流传送器(MDDCC)的四象限模拟乘法器,该电路由四个多输出的差动差分电流传送器和八个NMOS晶体管以及一个接地电阻构成。采用台湾积体电路制造公司(TSMC)的0.18μm的CMOS工艺对电路进行仿真分析得出模拟乘法器电路可以实现乘法计算、信号调制、信号倍频等功能,同时,模拟乘法器电路具有良好的线性特性和较高的截止频率以及很小的电压输出噪声。其次,研究了基于跨导运算放大器的二阶混合模式通用滤波器,改变电源的类型以及电源输入的位置,电路可以实现电压模式和电流模式,两种模式的滤波器均可以实现低通、高通和带通的滤波功能。此外,采用Berkeley short-channel IGFET model(BSIM)90nm CMOS工艺对电路进行仿真,对电路进行性能分析得出电路具有较低的灵敏度,滤波器电路的性能较稳定。最后,介绍了两种方法(级联法和有源模拟法)设计基于跨导运算放大器的高阶滤波器。详细研究了两种方法的具体设计理论和仿真过程,且进行了设计举例,对设计实例中的电路进行了PSPICE仿真,并对仿真电路进行了分析。基于跨导运算放大器和电流传送器的各种模拟滤波器电路在信号处理中具有重要作用,在微电子学、自动控制、仪器仪表以及电子测量等领域有广泛的应用价值。
[Abstract]:With the widespread popularization of the fourth generation communication technology (4G) and the research and development of the fifth generation communication technology (5G), the performance requirements of the mobile communication system are becoming higher and higher. The filter is an important module for removing the various signal noise interference and extracting effective frequency segments in the mobile communication system, and the performance requirements of the filter are also continuously proposed. At the same time, with the continuous advancement of the information age and the development of the ultra large scale integrated circuit (VLSI), the transistors are integrated into a small chip to meet the requirements of the system integration. The various devices and basic modules implemented by the MOS circuit and the MOS circuit to realize the filter circuit have been widely concerned. Therefore, the filter is directed to the filter. With higher bandwidth, higher integration, faster processing speed, less sensitivity, lower circuit loss and simpler circuit structure, the high performance of high integration, high frequency, high speed, low voltage swing and low impedance of universal active devices can meet the high performance requirements of the filter, making the filter possible It is better used in modern communication systems. Fully integrated continuous time filters can process analog signals directly, omitting A/D, D/A conversion, holding, sampling and anti aliasing filters to avoid the effect of clock feed. At the same time, transconductance operational amplifiers and current transmitters are one of the most important common active devices. There are a lot of fully integrated continuous time filters used in transconductance operational amplifiers and current transmitters. Up to now, the continuous time filters used for transconductance operational amplifiers and current transmitters can be divided into four types: analog division, voltage mode, current mode and mixing mode; the order is divided into low order and high order by order number; The current mode division is divided into direct design method and indirect design method, which is divided into single input and single output, single input and multiple output, multiple input and single output, multi input and multiple output. This paper systematically studies the circuit principle of transconductance operational amplifier and current transmitter, CMOS circuit structure and characteristics and its complete integration. The design method of the continuous time filter and analog multiplier. First, based on the characteristics of the differential differential current transmitter, a Four Quadrant Analog Multiplier Based on a multi output differential differential current transmitter (MDDCC) is proposed, which consists of four multi output differential differential current transmitters, eight NMOS transistors, and one grounding electricity. The 0.18 micron CMOS process of the Taiwan integrated circuit manufacturing company (TSMC) is used to simulate the circuit. The analog multiplier circuit can realize multiplicative calculation, signal modulation, signal frequency doubling and so on. At the same time, the analog multiplier circuit has good linearity and high cut-off frequency and very small voltage output noise. Secondly, the two order hybrid mode universal filter based on the transconductance operational amplifier is studied. The type of power supply and the position of the power input are changed. The voltage mode and current mode can be realized by the circuit. The filters of the two modes can achieve the filtering function of low pass, high pass and bandpass. In addition, the Berkeley short-channel IGFET m is used. The odel (BSIM) 90nm CMOS process simulates the circuit. The performance analysis of the circuit shows that the circuit has low sensitivity and the performance of the filter circuit is stable. Finally, two methods (cascade method and active simulation method) are introduced to design the high order filter based on the transconductance operational amplifier. The specific design principle of the two methods is studied in detail. The theory and simulation process are given, and the design examples are carried out. The circuit of the design example is simulated by PSPICE, and the simulation circuit is analyzed. The analog filter circuits based on the transconductance operational amplifier and the current transmitter play an important role in the signal processing, in microelectronics, automatic control, instrument and electronic measurement. There are wide application values in other fields.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713

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