基于通用集成运算放大器，利用MASON公式设计了一个多功能二阶通用滤波器，能同时或分别实现低通、高通和带通滤波，也能设计成一个正交振荡器。电路的极点频率和品质因数能够独立、精确地调节。电路使用4个集成运放、2个电容和11个电阻，所有集成运放的反相端虚地。利用计算机仿真电路的通用滤波功能、极点频率和品质因数的独立控制和正交正弦振荡，从而证明该滤波器正确有效。 Abstract: A new multifunctional second-order filter based on OPs was presented by MASON formula. Functions， such as high-pass， band-pass， low-pass filtering， can be realized respectively and simultaneously， and can become a quadrature oscillator by modifying resistance ratio. Its pole angular frequency and quality factor can be tuned accurately and independently. The Circuit presented contains four OPs， two capacitors， and eleven resistances， and inverting input of all OPs is virtual ground. Its general filtering， the independent control of pole frequency and quality factor and quadrature sinusoidal oscillation were simulated by computer， and the result shows that the presented Circuit is valid and effective.
上传时间： 2013-10-09
上传用户：13788529953
在Multisim 10软件环境下，设计一种由运算放大器构成的精确可控矩形波信号发生器，结合系统电路原理图重点阐述了各参数指标的实现与测试方法。通过改变RC电路的电容充、放电路径和时间常数实现了占空比和频率的调节，通过多路开关投入不同数值的电容实现了频段的调节，通过电压取样和同相放大电路实现了输出电压幅值的调节并提高了电路的带负载能力，可作为频率和幅值可调的方波信号发生器。Multisim 10仿真分析及应用电路测试结果表明，电路性能指标达到了设计要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the Circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier Circuit，the ability of driving loads was raised， the Circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable Circuit show that the performance indicators of the Circuit meets the design requirements.
上传时间： 2014-01-21
上传用户：shen007yue
Use the verilog language write a MIPS CPU code, and have additional instruction, for example: selection sort instruction. The code has contain combination Circuit and sequenial Circuit. CPU have contain ALU, ADD, ALU_CONTROL, DATA_MEMORY, INST_MEMORY, REGISTER, PC, and TESTBRANCH.
标签： instruction additional language example
上传时间： 2014-01-17
上传用户：yyyyyyyyyy
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC Circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
标签： signal Modulated analog create
上传时间： 2015-05-14
上传用户：CHINA526
本文简要介绍了集成电路MAX038的性能，并给出了以MAX038波形产生器为核心具有四种输出波形的函数 信号发生器的设计方案。用这种方法设计的信号发生器具有结构简单、成本低、体积小等特点，很好地满足 了一般的实验要求。 关键词：集成电路 信号发生器 频率 Abstract：The performance ofIC_MAX038 was introduced briefly in this paper．At the sa／ne time，a signal generator design making with integrated Circuit MAX038 is provided，which can produce four kinds of waveforms output．The signal generator was of characters such as simple structur，cheap expense，small volume and SO on．The signal generator contents the demand of general experiments very wel1． Key words：Integrated Circuit Signal generator Frequency
上传时间： 2013-12-12
上传用户：四只眼
IC卡智能卡，即IC卡，又称“集成电路卡”，英文名称为“Integrated Circuit Card” 或 “Smart Card”,是将具有存储、加密及数据处理能力的集成电路芯片镶嵌于塑料基片中制作而成，它包含了微电子技术和计算机技术，是一种成熟的高技术产品。 这种既具有智能性又便于携带的卡片，为现代信息处理、传递提供了一种全新的手段，根据卡中所做的集成电路不同，智能卡主要有以下四大类：
上传时间： 2014-01-25
上传用户：alan-ee
t transistor has the characteristics of components of the sensor real-time measurement of voltage and current signals through, obtained quality factor correction Circuit for the feedback and the feedback time, IBM used the feedback field effect transistor implementation, in order to achieve quality factor correction circ
标签： characteristics measurement transistor components
上传时间： 2014-12-22
上传用户：杜莹12345
A system simulation environment in Matlab/Simulink of RFID is constructed in this paper. Special attention is emphasized on the analog/RF Circuit.Negative effects are concerned in the system model,such as phase noise of the local oscillator,TX-RX coupling,reflection of the environment, AWGN noise,DC offset,I/Q mismatch,etc.Performance of the whole system can be evaluated by changing the coding method,parameters of building blocks,and operation distance.Finally,some simulation results are presented in this paper.
标签： environment constructed simulation Simulink
上传时间： 2014-01-09
上传用户：zhangliming420
The aim of this book is to provide the reader with a thorough grounding in the General Packet Radio Service – GPRS.The introduction contains a basic review of GSM to ensure that the reader is clear on the main aspects of Circuit switched technology, as this will make the differences and advantages of packet oriented GPRS both more apparent and easier to understand.
标签： grounding the thorough General
上传时间： 2016-03-30
上传用户：康郎
Squaring Circuits are an important building block for impulse-radio UWB non-coherent receivers. This work proposes a squarer, based on the quadratic law of saturated transistors. Such a Circuit has already been proposed for lower frequency applications, therefore this work focuses on the extension to ultra wide bandwidth, with particular care to the consequences related to the deviation from the ideal quadratic law of 0.18μm CMOS transistors.
标签： impulse-radio non-coherent important receivers
上传时间： 2013-12-24
上传用户：kikye
