排序方式: 共有65条查询结果,搜索用时 0 毫秒
11.
12.
刘崇新 《微电子学与计算机》1998,(3)
本文提出了以电流传输器CCⅡ±为基本电路元件的电流模式全集成MOSFET-C精确连续时间四阶带通滤波器电路,并应用PSPICE-Ⅱ通用模拟电路程序,对其幅频特性和相频特性进行了计算机仿真分析,得出了实用的结论。 相似文献
13.
Demodulation of acoustic telemetry binary phase shift keying signal based on high-order Duffing system 下载免费PDF全文
In order to grasp the downhole situation immediately, logging while drilling(LWD) technology is adopted. One of the LWD technologies, called acoustic telemetry, can be successfully applied to modern drilling. It is critical for acoustic telemetry technology that the signal is successfully transmitted to the ground. In this paper, binary phase shift keying(BPSK) is used to modulate carrier waves for the transmission and a new BPSK demodulation scheme based on Duffing chaos is investigated. Firstly, a high-order system is given in order to enhance the signal detection capability and it is realized through building a virtual circuit using an electronic workbench(EWB). Secondly, a new BPSK demodulation scheme is proposed based on the intermittent chaos phenomena of the new Duffing system. Finally, a system variable crossing zero-point equidistance method is proposed to obtain the phase difference between the system and the BPSK signal. Then it is determined that the digital signal transmitted from the bottom of the well is ‘0' or ‘1'. The simulation results show that the demodulation method is feasible. 相似文献
14.
给出以电流传输器[CCⅡ±]平稳结构积分电路为基础的全集成MOSFET—C精确连续时间二阶带通滤波器电路,并对其消除非线性因素进行理论分析,且利用PSPICE(Ⅱ)通用模拟电路程序对其输出电压幅频特性进行计算机仿真分析,得出了实用的结论。 相似文献
15.
16.
17.
18.
19.
提出了一个新的四维自治超混沌系统,对其基本动力学特性进行了数值仿真和深入的研究.运用EWB软件对实现该超混沌系统的分数阶振荡器电路进行了仿真实验证实.
关键词:
分数阶超混沌系统
动力学行为
分数阶电路 相似文献
20.
A new circuit unit for the analysis and the synthesis of the chaotic behaviours in a fractional-order Liu system is proposed in this paper. Based on the approximation theory of fractional-order operator, an electronic circuit is designed to describe the dynamic behaviours of the fractional-order Liu system with α = 0.9. The results between simulation and experiment are in good agreement with each other, thereby proving that the chaos exists indeed in the fractional-order Liu system. 相似文献