Placing in Mentor VX-Complete Guide to placing Parts in New Mentor expedition VX PCB Design flow
標(biāo)簽： Mentor VX Place guide
上傳時(shí)間： 2015-02-26
上傳用戶(hù)：15690314741
This book is basicly talking about AC and DC power flow calculaion
標(biāo)簽： Power System analysis and design
上傳時(shí)間： 2015-03-27
上傳用戶(hù)：fatiger
The General Packet Radio Service (GPRS) allows an end user to send and receive data in packet transfer mode within a public land mobile network (PLMN) without using a permanent connection between the mobile station (MS) and the external network during data transfer. This way, GPRS opti- mizes the use of network and radio resources (RRs) since, unlike circuit- switched mode, no connection between the MS and the external network is established when there is no data flow in progress. Thus, this RR optimiza- tion makes it possible for the operator to offer more attractive fees.
上傳時(shí)間： 2020-05-27
上傳用戶(hù)：shancjb
Communication protocols – for short protocols – form the basis for the opera- tion of computer networks and telecommunication systems. They are behavior conventions which describe how communication systems interact with each other in computer networks. Protocols define the temporal order of the interactions and the formats of the data units exchanged. Communication protocols comprise a wide range of different functions and mechanisms, such as the sending and receiv- ing of data units, their coding/decoding, error control mechanisms, timer control, flow control, and many others.
標(biāo)簽： Engineering Protocol
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
This paper reviews key factors to practical ESD protection design for RF and analog/mixed-signal (AMS) ICs, including general challenges emerging, ESD-RFIC interactions, RF ESD design optimization and prediction, RF ESD design characterization, ESD-RFIC co-design technique, etc. Practical design examples are discussed. It means to provide a systematic and practical design flow for whole-chip ESD protection design optimization and prediction for RF/AMS ICs to ensure 1 st Si design success.
標(biāo)簽： ESD_protection_for_RF_and_AMS_ICs
上傳時(shí)間： 2020-06-05
上傳用戶(hù)：shancjb
The “bottom-line” metrics of cash flow, demand, price, and return on investment are driven by a second set of financial metrics represented by value to the customer, cost, and the pace of innovation. Get them right relative to competition and impressive bottom-line results should follow. Because of their importance, we call value to the customer, variable cost, and the pace of innovation the “fundamental metrics.”
標(biāo)簽： Planning Product Systems Driven Value and
上傳時(shí)間： 2020-06-06
上傳用戶(hù)：shancjb
Control systems are used to regulate an enormous variety of machines, products, and processes. They control quantities such as motion, temperature, heat flow, fluid flow, fluid pressure, tension, voltage, and current. Most concepts in control theory are based on having sensors to measure the quantity under control. In fact, control theory is often taught assuming the availability of near-perfect feedback signals. Unfortunately, such an assumption is often invalid. Physical sensors have shortcomings that can degrade a control system.
標(biāo)簽： Observers Control Systems in
上傳時(shí)間： 2020-06-10
上傳用戶(hù)：shancjb
針對(duì)嵌入式產(chǎn)品程序更新問(wèn)題,提出了一種基于IAP技術(shù)的STM32單片機(jī)在線固件升級(jí)方案,設(shè)計(jì)了STM32單片機(jī)最小系統(tǒng)硬件電路和USB轉(zhuǎn)串口通信電路,并給出了Bootloader程序、APP程序、PC上機(jī)程序的實(shí)現(xiàn)流程.實(shí)驗(yàn)結(jié)果表明,該方案具有簡(jiǎn)單實(shí)用、穩(wěn)定性高、維護(hù)成本低和設(shè)備使用效率高的特點(diǎn),適用于嵌入式產(chǎn)品升級(jí).For the problem of updating embedded products program,an online firmware upgrade scheme of STM32 single chip microcomputer based on IAP technology is proposed.This scheme not only elaborates the principle of IAP technology in detail but also provides the design of the minimum system hardware circuit of STM32 MCU,the design of USB for serial communication circuit,and the implementation flow of Bootloader program,APP program and PC program.The experiment results show that the scheme is simple,practical and highly stable.In addition,it can be used to actual embedded product upgrading,significantly reducing maintenance costs and improving the efficiency of equipment.
上傳時(shí)間： 2022-03-25
上傳用戶(hù)：
在全球氣候變暖和石油資源短缺的形勢(shì)下,推動(dòng)新能源汽車(chē)的發(fā)展將成為汽車(chē)行業(yè)一種新的發(fā)展方向。在大力發(fā)展新能源電動(dòng)汽車(chē)行業(yè)的同時(shí)還應(yīng)兼顧電動(dòng)汽車(chē)充電設(shè)施的發(fā)展,因此對(duì)電動(dòng)汽車(chē)充電樁的設(shè)計(jì)與研究顯得十分必要。對(duì)電動(dòng)汽車(chē)直流充電樁的硬件系統(tǒng)進(jìn)行設(shè)計(jì),主要的硬件電路包括安全監(jiān)測(cè)電路、總壓采集電路、溫濕度檢測(cè)電路、語(yǔ)音電路。軟件包括主要流程圖和溫濕度檢測(cè)流程圖。Under the situation of global warming and shortage of petroleum resources,promoting the development of new energy vehicles will become a new development direction for the automotive industry.While vigorously developing the new energy electric vehicle industry,we should also take into account the development of electric vehicle charging facilities.Therefore,the design and research of electric vehicle charging piles is very necessary.The hardware system of the electric vehicle DC charging pile is designed.The main hardware circuits include safety monitoring circuit,total voltage collecting circuit,temperature and humidity detecting circuit,voice circuit and CAN communication.The software includes a main flow chart and a temperature and humidity detection flow chart.
標(biāo)簽： 電動(dòng)汽車(chē)
上傳時(shí)間： 2022-04-03
上傳用戶(hù)：jason_vip1
基于TMS320F28335的超聲波流量計(jì)硬件原理圖+軟件源碼本文以TMS320F28335 處理器為核心，設(shè)計(jì)一種用于管道流量測(cè)量的超聲波流量計(jì)。系統(tǒng)硬件由核心板，超聲波發(fā)射和接收電路，切換電路，超聲換能器，基于ADS805 的高速信號(hào)采集電路，人機(jī)交互以及電源等模塊構(gòu)成。采用時(shí)差法進(jìn)行管道流量測(cè)量，時(shí)差測(cè)量采用SCOT 加權(quán)的廣義互相關(guān)時(shí)延估計(jì)算法。本論文設(shè)計(jì)的超聲波流量計(jì)具有測(cè)量速度快、準(zhǔn)確性好、成本低等優(yōu)點(diǎn)。關(guān)鍵字：C2000，超聲波，流量，廣義互相關(guān)算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, flow, Generalized Cross-Correlation Algorithm
標(biāo)簽： tms320f28335 超聲波流量計(jì)
上傳時(shí)間： 2022-05-06
上傳用戶(hù)：
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