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Improvement of Characteristics of Filters For Signal Process

信号处理滤波器特性的改进

基本信息

批准号：
07044309
负责人：
FUJII Nobuo
金额：
--
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for International Scientific Research.
财政年份：
1995
资助国家：
日本
起止时间：
1995 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07044309/
关键词：
Integrated Circuits Active Filter Current Mode Low Voltege Circuit High Frequency Filter MOSFET-C Filter

项目摘要

We have done the following two subjects in this joint research.1. Reduction of the chip area in the MOSFET-C filtersThe reduction of the chip area in integrated circuits is one of the most important matters to realize small size equipments which are used in portable electronic machines. In the research, we proposed a method of reducing the chip area of MOSFET-C filters which have a highly linear characterstic and are integrable in monolithic integrated circuits. Considering the current and voltage relations of MOSFETs in the circuit, some MOSFETs can be represented with the same relations and be deleted, thus we can reduce the number of MOSFETs leading to a reduction of the chip area. This results have been published in the Technical Report of Electronic Circuits of IEE of Japan.2. Low voltage high frequency current mode active filtersIn the era of small size and light weigh equipments, low voltege operation of circuits is quite important. In order to reduce the power supply voltage, we in this research proposed a current mode signal processing scheme. Using the diode connenctecd bipolar transisters and current mirrors, we can realize current mode signal processing circuits. Adding integrated capacitors to the current mode circuit, we can obtain current mode active filters. The filters are integrable in a monolithic form and have quite good characteristics, especially in high frequencyies. The results will be submitted to a journal.During this joint research, we visited Korea twice to discuss the results with professor D.Y.Kim and exchanged fruitfull opinion each other.

在本次联合研究中，我们做了以下两个课题.减少集成电路中的芯片面积是实现便携式电子机器中使用的小型设备的最重要的问题之一。在研究中，我们提出了一种减小具有高度线性特性的可集成单片集成电路的EQUET-C滤波器的芯片面积的方法。考虑到电路中MOSFET的电流和电压关系，可以用相同的关系表示某些MOSFET，并将其删除，从而减少MOSFET的数量，从而减少芯片面积。该结果已发表在日本IEE电子电路技术报告中.低电压高频电流型有源滤波器在设备小型化、轻量化的时代，电路的低电压工作是非常重要的。为了降低电源电压，本研究提出一种电流模式信号处理方案。利用二极管连接的双极晶体管和电流镜，可以实现电流型信号处理电路。在电流模式电路中加入集成电容，可以得到电流模式有源滤波器。该滤波器是可集成的单片形式，并具有相当好的特性，特别是在高频。研究结果将提交给期刊。在此次合作研究中，我们两次访问韩国，与D.Y.Kim教授讨论研究结果，并相互交换了富有成果的意见。