共查询到17条相似文献,搜索用时 93 毫秒
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通过对通用数字滤波器公式的细致分析,建立了一种最为精简实用的滤波器模块单元,给出了模拟结果,进而提出了编程滤波器阵列单元的概念,提供了在实用数字滤波的具体实现中比数字信号处理(DSP)更直接,更高效的途径。 相似文献
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根据C.F.KURTH和G.S.MOSCHYTZ的采用z域四口等效电路对开关电容网络进行双口分析的理论,以现场可编程模拟阵列FPAA实现的PID控制器为例,建立用于频域仿真的SPICE模型,从而方便地用SPICE软件对PID校正后的整个控制系统的稳定性进行仿真分析。 相似文献
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开关电容器现场可编程模拟阵列的频域SPICE仿真 总被引:1,自引:0,他引:1
根据C.F.KURTH和G.S.MOSCHYTZ采用z域四口等效电路对开关电容器网络进行双口分析的理论。以现场可编程模拟阵列实现的PID控制器为例,建立了一个用于频域仿真的SPICE模型。从而方便地用SPICE软件对PID校正后整个控制系统的稳定性进行仿真分析。 相似文献
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本篇文章提出了基于采用高度灵活的互连盒的互连网络的一种新型的现场可编程模拟阵列(FPAA)结构,该结构可以在双模式下工作包括离散时间模式和连续时间模式,以追求在不同应用场合下的性能要求。高度灵活的互连盒中的开关不仅用来作为可编程开关还直接作为开关电容中电荷转移的开关来使用,大大减少了离散时间模式下信号路径上的开关,提高了整体电路的性能。该款FPAA采用0.18um CMOS工艺,3.3V电源电压。后仿结果显示互连网络的最大带宽可达265MHz, 从示例的测试结果可以看出该款FPAA在连续时间模式下可工作在2MHz信号带宽下,无杂散动态范围可达54dB, 离散时间工作模式下的处理精度可达96.4%。 相似文献
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数字音频均衡器中最关键的部分就是滤波系统,滤波系统精度的高低、效果的好坏直接决定着整台均衡器对音频的修饰效果.本文采用开关电容技术的现场可编程模拟阵列FPAA构成的数字音频均衡器,选择了一种全新构建音频均衡器的设计方法,以求获得一个使用方便、音效调节效果好、成本低的音频均衡器系统.开关电容椭圆函数滤波器的整体频率响应特性与标准曲线比较接近,是一种较好的音频均衡器滤波器系统.随着开关电容技术、电流模和电压模技术的进一步发展,FPAA可广泛用于工控、医疗、仪器、高级音频、自动测试设备、汽车、通信等领域. 相似文献
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MPAA020现场可编程模拟阵列 总被引:2,自引:0,他引:2
MPAA020是Motorola公司新推出的可编程模拟ASIC,该 在似于常用的FPGA〉它以SRAM编程数据,由基于开关电容技术的模拟单元阵列组成,主要用于各种模拟信号的放大、滤波和转换,本文介绍了MPAA020芯片的基本结构、主要性能参数、相应的开发软件及其在模拟电子系统设计中的应用。 相似文献
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Built-In Self-Test of Field Programmable Analog Arrays based on Transient Response Analysis 总被引:1,自引:1,他引:0
T. R. Balen J. V. Calvano M. S. Lubaszewski M. Renovell 《Journal of Electronic Testing》2007,23(6):497-512
In this work a strategy for testing analog networks, known as Transient Response Analysis Method, is applied to test the Configurable
Analog Blocks (CABs) of Field Programmable Analog Arrays (FPAAs). In this method the Circuit Under Test (CUT) is programmed
to implement first and second order blocks and the transient response of these blocks to known input stimuli is analyzed.
Taking advantage of the inherent programmability of the FPAAs, a BIST-based scheme is used in order to obtain an error signal
representing the difference between fault-free and faulty CABs. Two FPAAs from different manufacturers and distinct architectures
are considered as CUT. For one of the devices there is no detailed information about its structural implementation. For this
reason, a functional fault model based on high-level parameters of the transfer function of the programmed blocks is adopted,
and then, the relationship between these parameters and CAB component deviations is investigated. The other considered device
allows a structural programming in which the designer can directly modify the values of programmable components. This way,
faults can be injected by modifying the values of these components in order to emulate a defective behavior. Therefore, it
is possible to estimate the fault coverage and test application time of the proposed functional test method when applied to
both considered devices.
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M. RenovellEmail: |
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Christophe Premont Richard Grisel Nacer Abouchi Jean-Pierre Chante 《Analog Integrated Circuits and Signal Processing》1998,17(1-2):105-124
An approach for designing a Field Programmable Analog Array (FPAA) is described. The analog array is based on current conveyors and benefits from two major interests: a large bandwidth and a low number of discrete components needed for the implementation of analog functions. An Analog Elementary Cell (AEC), based on current conveyors has been developed, and it is associated with programmable resistors and capacitors. Analog functions can be performed programming several AECs as current-mode amplifiers, analog multipliers, etc. The main purpose of this paper is to introduce current conveyor based analog blocks which are very-well suited for the implementation of FPAA. A particular interconnection architecture is addressed using current conveyors as switches. The major key feature of the proposed approach is that current conveyors are used as active elements and switching elements. A new topology based on the developed AEC is proposed and should be shortly validated. 相似文献
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Lech Znamirowski Olgierd A. Palusinski Cornel Reiser 《Analog Integrated Circuits and Signal Processing》2002,31(1):19-30
This paper presents an investigation of dynamically reconfigurable mixed-signal circuit constructed using a digital control system and the new technology of Field Programmable Analog Arrays (FPAA). A Motorola FPAA described in this paper can be used to build filters for analog signals as well as other kinds of analog applications implemented in switched capacitor technology (S/C-technology). The experimental studies described, take advantage of performance and programmability of the FPAA for filtering of an analog signal. The circuit structure is based on 2 parallel FPAA chips, analog multiplexer and multiplexer's control logic controlled by a digital system such as a PC or a Field Programmable Gate Array (FPGA). Dynamic reconfiguration is used in this system for adaptive filtering, or adaptive processing in general. Modeling and measurements of the transition behavior of the switching process between the 2 FPAA chips and analysis of limitations imposed by hardware imperfections will be presented. The experimental system assembled in this work is an excellent vehicle to learn about intricacies in performance of mixed-signal circuits and is used for verification of theoretical predictions and model validation/modification. 相似文献
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The drive towards shorter design cycles for analog integrated circuits has given impetus to the development of Field Programmable Analog Arrays (FPAAs), which are the analogue counterparts of Field Programmable Gate Arrays (FPGAs). In this paper, we present a new design methodology which using FPAA as a powerful analog front-end processing platform in the smart sensory micro- system. The proposed FPAA contains 16 homogeneous mixed-grained Configurable Analog Blocks (CABs) which house a variety of processing elements especially the proposed fine-grained Core Con- figurable Amplifiers (CCAs). The high flexible CABs allow the FPAA operating in both continu- ous-time and discrete-time approaches suitable to support variety of sensors. To reduce the nonideal parasitic effects and save area, the fat-tree interconnection network is adopted in this FPAA. The functionality of this FPAA is demonstrated through embedding of voltage and capacitive sensor signal readout circuits and a configurable band pass filter. The minimal detectable voltage and capacitor achieves 38 uV and 8.3 aF respectively within 100 Hz sensor bandwidth. The power consumption comparison of CCA in three applications shows that the FPAA has high power efficiency. And the simulation results also show that the FPAA has good tolerance with wide PVT variations. 相似文献
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基于可编程跨导运算放大器POTA低通有源滤波器设计 总被引:1,自引:0,他引:1
该文给出了基于可编程跨导运算放大器(POTA)的有源滤波器设计方法,能在一定范围内实现跨导值程控调节, 提高调节精度和准确度。并且利用Jacobi法求解相似对角形矩阵,避免解高次方程的难题。所设计的有源滤波电路不易受分布电容的影响,稳定性好、灵敏度低。本文给出了设计实例,显示了该方法的优点。 相似文献
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DSP FPGA构成的数字硬件系统以其强通用性、灵活性、高处理速度而使其在诸多领域有广泛的应用;GPP(General Purpose Processor)功能强大,不仅可以做复杂的控制算法,还具有强大的数字信号处理能力。本文介绍了一种基于DSP FPGA GPP-CPU的软件无线电信号处理通用硬件平台的设计。 相似文献