基于通用集成運算放大器，利用MASON公式設計了一個多功能二階通用濾波器，能同時或分別實現(xiàn)低通、高通和帶通濾波，也能設計成一個正交振蕩器。電路的極點頻率和品質因數(shù)能夠獨立、精確地調節(jié)。電路使用4個集成運放、2個電容和11個電阻，所有集成運放的反相端虛地。利用計算機仿真電路的通用濾波功能、極點頻率和品質因數(shù)的獨立控制和正交正弦振蕩，從而證明該濾波器正確有效。 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.
上傳時間： 2013-10-09
上傳用戶：13788529953
在Multisim 10軟件環(huán)境下，設計一種由運算放大器構成的精確可控矩形波信號發(fā)生器，結合系統(tǒng)電路原理圖重點闡述了各參數(shù)指標的實現(xiàn)與測試方法。通過改變RC電路的電容充、放電路徑和時間常數(shù)實現(xiàn)了占空比和頻率的調節(jié)，通過多路開關投入不同數(shù)值的電容實現(xiàn)了頻段的調節(jié)，通過電壓取樣和同相放大電路實現(xiàn)了輸出電壓幅值的調節(jié)并提高了電路的帶負載能力，可作為頻率和幅值可調的方波信號發(fā)生器。Multisim 10仿真分析及應用電路測試結果表明，電路性能指標達到了設計要求。 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.
上傳時間： 2014-01-21
上傳用戶：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.
標簽： instruction additional language example
上傳時間： 2014-01-17
上傳用戶：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.
標簽： signal Modulated analog create
上傳時間： 2015-05-14
上傳用戶：CHINA526
本文簡要介紹了集成電路MAX038的性能，并給出了以MAX038波形產生器為核心具有四種輸出波形的函數(shù) 信號發(fā)生器的設計方案。用這種方法設計的信號發(fā)生器具有結構簡單、成本低、體積小等特點，很好地滿足 了一般的實驗要求。 關鍵詞：集成電路 信號發(fā)生器 頻率 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
上傳時間： 2013-12-12
上傳用戶：四只眼
IC卡智能卡，即IC卡，又稱“集成電路卡”，英文名稱為“Integrated Circuit Card” 或 “Smart Card”,是將具有存儲、加密及數(shù)據(jù)處理能力的集成電路芯片鑲嵌于塑料基片中制作而成，它包含了微電子技術和計算機技術，是一種成熟的高技術產品。 這種既具有智能性又便于攜帶的卡片，為現(xiàn)代信息處理、傳遞提供了一種全新的手段，根據(jù)卡中所做的集成電路不同，智能卡主要有以下四大類：
上傳時間： 2014-01-25
上傳用戶：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
標簽： characteristics measurement transistor components
上傳時間： 2014-12-22
上傳用戶：杜瑩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.
標簽： environment constructed simulation Simulink
上傳時間： 2014-01-09
上傳用戶：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.
標簽： grounding the thorough General
上傳時間： 2016-03-30
上傳用戶：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.
標簽： impulse-radio non-coherent important receivers
上傳時間： 2013-12-24
上傳用戶：kikye
