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電子書-RTL Design Style Guide for Verilog HDL540頁A FF having a fixed input value is generated from the description in the upper portion of
Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously input,
and ’1’ is output when the START signal rises. Therefore, the FF data input is fixed at
the power supply, since the typical value ’1’ is output following the rise of the START
signal.
When FF input values are fixed, the fixed inputs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan
may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower
part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that
the clock signal is input to the clock pin of the FF.
Other than the sample shown in Example 2-21, there are situations where for certain
control signals, those that had been switched due to the conditions of an external input
will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a
fixed value is input from an upper level, the input value of the FF may also end up being
fixed as the result of optimization with logic synthesis tools. In a situation like this, while
perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
標簽：
RTL
verilog hdl
上傳時間：
2022-03-21
上傳用戶：canderile
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本系統采用電動機電樞供電回路串接采樣電阻的方式來實現對小型直流有刷電動機的轉速測量。該系統主要由二階低通濾波電路,小信號放大電路、單片機測量顯示電路、開關穩壓電源電路等組成。同時自制電機測速裝置,用高頻磁環作為載體,用線圈繞制磁環,利用電磁感應原理檢測電機運行時的漏磁,將變化的磁場信號轉化為磁環上的感應電流。用信號處理單元電路將微弱電信號轉化為脈沖信號,送由單片機檢測,從而達到準確測量電機的速度的要求。In this system, the sampling resistance of armature power supply circuit is connected in series to measure the speed of small DC brush motor. The system is mainly composed of second-order low-pass filter circuit, small signal amplifier circuit, single-chip measurement and display circuit, switching regulated power supply circuit and so on. At the same time, the self-made motor speed measuring device uses high frequency magnetic ring as the carrier, coil winding magnetic ring, and electromagnetic induction principle to detect the leakage of magnetic field during the operation of the motor, which converts the changed magnetic field signal into the induced current on the magnetic ring. The weak electric signal is transformed into pulse signal by signal processing unit circuit, which is sent to single chip computer for detection, so as to meet the requirement of accurate measurement of motor speed.
標簽：
直流電動機
上傳時間：
2022-03-26
上傳用戶：
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隨著科技發展及工業4.0 進程推進,機械臂應用范圍越來越廣,并演化出各種各樣的機械臂,如碼垛機械臂、焊接機械臂、裝配機械臂以及手術機械臂等。現利用solidworks 進行三維建模,設計制作一款基于stm32f103c8t6 單片機的主從式桌面級機械臂,該機械臂包括一個主動機械臂和一個從動機械臂,采用藍牙傳輸信號方式進行同步運動,并且詳細介紹了該機械臂材料選擇、結構設計、工作原理、組成部分和設計特點。With the development of science and technology and the advancement of Industry 4.0, the application range of the mechanical arm has become wider and wider, and various types of mechanical arms, such as palletizing robot arms, welding robot arms, assembly robot arms, and surgical robot arms, have been developed. Now using solidworks for 3D modeling, design and manufacture a master-slave desktop-level robot arm based on stm32f103c8t6 single-chip microcomputer. The robot arm includes an active robot arm and a slave robot arm, which uses Bluetooth to transmit signals for synchronous motion. The material selection, structural design, working principle, components and design features of the manipulator are introduced.
標簽：
stm32f103c8t6
單片機
上傳時間：
2022-03-27
上傳用戶：
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搶答器是一種智力競賽常用的器件,搶答器的設計方法千差萬別,文章利用常用的數字電子器件,設計了八路搶答器電路的設計、仿真及實現的全過程,提出兩種可行的設計方案:方案1采用74ls373實現電路鎖存,74ls148實現電路編碼,74ls74及數碼管實現電路顯示;方案二采用CD4511BCN和LMC555CM集成電路及數碼管實現搶答器的控制和顯示。本文設計用的器件簡單,容易理解,適用于初學電子技術的人員。Answer scrambler is a common device in intelligence competition, and its design methods vary greatly. This paper designs the whole process of design, simulation and Realization of the circuit of eight-way answer scrambler by using common digital electronic devices, and puts forward two feasible design schemes: scheme 1 uses 74 ls373 to realize circuit latching, 74 ls148 to realize circuit coding,74 ls74 and digital tube to realize circuit. The second scheme uses CD4511 BCN, LMC555 CM integrated circuit and digital tube to control and display the answerer. The device designed in this paper is simple and easy to understand, and it is suitable for the beginners of electronic technology.
標簽：
搶答器
上傳時間：
2022-04-05
上傳用戶：
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1. Preface2. The concept2.2. Prescience 2.3. Reading guide 2.4. Abbreviations 2.5. Version management3. Hardware3.2. ESP32 3.3.2. Hardware schema 3.3.3. DHT22 and level shifter 3.3.4. Geekcreit? ESP32 Development Board4. Software4.2. Installatie van GIT 4.3. Installatation of the ESP32 Core 4.4. Installation of the Xtensa and ESP32 Tools 4.5. Python 4.5.1. Install Python 4.5.2. Installation of pySerial and EspTool 4.6. Test the software installation5. The ESP32 IoT project 5.1.1. WiFi connection 5.1.2. Setup date and time 5.1.3. MQTT connection 5.1.4. Determining temperature and humidity 5.2. IOT_ESP32_Project source6. Test6.2. ESP32, NodeJS, MongoDB en Mosca 6.2.1. Start MongoDB 6.2.2. Start NodeJS Express serve and Mosca broker 6.2.3. Start the ESP32 6.2.4. Start an Chrome browser
標簽：
esp32
dht11
mqtt
上傳時間：
2022-04-05
上傳用戶：kingwide
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文章針對800×600象素的 TFT LCD，介紹了LCD顯示原理、TFT元件特性、TFT-LCD的結構及驅動原理，重點進行了 TFT-LCD周邊驅動電路設計，包括柵（行）驅動電路和源〔列）驅動電路。柵驅動芯片，內部主要包括邏輯控制電路、雙向移位寄存器、電平位移電路和4-Level輸出電路。本文設計了一種多模式工作的柵驅動電路，其中控制電路包含左右移位控制、輸入輸出控制、分段清零、工作模式選擇，且相互之間必須進行互相配合。可根據應用場合的不同，而選擇不同的工作模式。列驅動芯片，首先分析其工作原理，并對內部兩個關鍵電路進行設計：并行輸入串行輸出電路和用于實現λ校正的DA變換電路。并采用兩種方式實現了DA轉換，一種是利用高低電壓組合；另一種是采用高低位譯碼電路來實現。在此基礎上，為了能夠降低列驅動芯片的功耗，對列驅動芯片的結構進行了改進，并對改進后的緩沖電路進行了設計，采用 Hspice對芯片內部的模塊電路進行仿真，仿真結果表明，所設計的驅動芯片基本能夠滿足所需的要求，并對柵驅動電路進行版圖設計關鍵詞：TFT LCD電平位移柵驅動列驅動科學技術的發展日新月異，顯示技術也在發生一場革命，隨著顯示技術的突破及市場需求的急劇增長，使得以液晶顯示（LCD）為代表的平板顯示（FPD）技術迅速崛起。目前競爭最激烈的平板顯示器有四個品種：場致發射平板顯示器（FED）、等離子體平板顯示器（PDP）、薄膜晶體管液晶平板顯示器（TFT-ICD）和有機電致發光顯示器（OLED）。而由于 TFT-LCD在亮度、對比度、功耗、壽命、體積和重量等方面的優勢，從而得到廣泛的關注和應用
標簽：
tft
lcd
驅動
芯片
上傳時間：
2022-04-22
上傳用戶：
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數字頻率計是電工電子中常用的測量儀器,數字頻率計通過用輸入待測信號對一特定長度的信號進行計數,從而得出頻率并通過數碼管直觀的顯示出來。本文提出了一種與輸入同步的數字頻率計的設計,提高了頻率計的精度,設計采用Multisim軟件進行設計和仿真的過程,介紹了其工作原理,硬件電路設計和仿真的過程。設計采用了Multisim軟件進行設計和仿真,設計結果得到的驗證。Digital frequency counter is used to measure the frequency of a signal.It is common to use a multivibrator to generate a standard 1 second time base signal and count input signal gated by this signal.However,the asynchronous of this time base signal with input signal will bring errors.In this paper,a high precision frequency counter which use synchronized time base signal generator is proposed.This frequency counter is designed and simulated by Multisim tools and result is verified.
標簽：
multisim
上傳時間：
2022-05-08
上傳用戶：
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《數字集成電路:電路、系統與設計(第二版) 》，電子工業出版社出版，外文書名: Digital Integrated Circuits:A Design Perspective,Second Edition，作者：簡·M.拉貝艾 (Jan M.Rahaey) (作者), Anantha Chandrakasan (作者), Borivoje Nikolic (作者), 周潤德 (譯者), 等 (譯者)。本書由美國加州大學伯克利分校Jan M. Rabaey教授等人所著。全書共12章，分為三部分： 基本單元、電路設計和系統設計。本書在對MOS器件和連線的特性做了簡要的介紹之后，深入分析了數字設計的核心——反相器，并逐步將這些知識延伸到組合邏輯電路、時序邏輯電路、控制器、運算電路以及存儲器這些復雜數字電路與系統的設計中。為了反映數字集成電路設計進入深亞微米領域后正在發生的深刻變化，本書以CMOS工藝的實際電路為例，討論了深亞微米器件效應、電路最優化、互連線建模和優化、信號完整性、時序分析、時鐘分配、高性能和低功耗設計、設計驗證、芯片測試和可測性設計等主題，著重探討了深亞微米數字集成電路設計所面臨的挑戰和啟示。
標簽：
數字集成電路
電路系統
上傳時間：
2022-05-13
上傳用戶：zhaiyawei
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萊昂斯《數字信號處理（第三版）（英文版）》在Richard G. Lyons所著Understanding Digital Signal Processing, Second Edition的基礎上進行了改編，針對通信類學校本科教學大綱，刪除了教學中一般不涉及的內容，調整了章節順序，并增加了z反變換、濾波器結構、線性相位FIR濾波器和其結構、模擬濾波器簡介的內容，使教內容材更加完整。全書在概述了離散序列和系統的定義和實例之后，詳細討論了離散系統的特性、信號的離散化和離散卷積、z變換、離散時間傅里葉變換和離散傅里葉變換、快速傅里葉變換、數字濾波器結構、以及有限和無限脈沖響應數字濾波器的設計等基本概念和基本理論。書中涉及的數學知識以簡明形式給出，深入淺出，易于理解。本書每章都增加了例題、習題和MATLAB例題，以便加強對每章內容的理解和掌握。 書中通過具有啟發性的解釋和精心挑選的例子，采用易于理解的數學表示方法，循序漸進地對數字信號處理技術加以說明和解釋，幫助讀者從整體掌握DSP基礎，并逐步掌握較高層次的DSP概念和應用。本書特點：包含大量實際直觀的例子；強調實際的、日常的DSP應用和解決方案·提供了全新的正交信號處理內容，包括易于理解的三維空間圖；包括即使是經驗豐富的專業人士也可能忽略的技術方法；涵蓋頻率采樣、內插式FER、CIC等重要濾波器；提供流行的數字信號處理技巧。
標簽：
數字信號處理
上傳時間：
2022-05-22
上傳用戶：
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RX-8801 SA Features built-in 32.768 kHz DTCXO, High Stability Supports l'C-Bus's high speed mode (400 kHz)Alarm interrupt function for day, date, hour, and minute settings Fixed-cycle timer interrupt function Time update interrupt function32.768 kHz output with OE function Auto correction of leap years Wide interface voltage range: 2.2 V to 5.5 V Wide time-keeping voltage range:1.8 V to 5.5 V Low current consumption: 0.84A/3V (Typ.)is an IC bus interface-compliant real-time clock which includes a 32.768 kHz DTCXO In addition to providing a calendar (year, month, date, day, hour, minute, second) function and a clock counter function, this module provides an abundance of other functions including an alarm function, fixed-cycle timer unction, time update interrupt function, and 32.768 kHz output function.The devices in this module are fabricated via a C-MOS process for low current consumption, which enables ong-term battery back-up.
標簽：
時鐘芯片
rx8025t
上傳時間：
2022-06-17
上傳用戶：
