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S參數(shù)的設(shè)計(jì)與應(yīng)用

Agilent AN 154 S-Parameter Design Application Note S參數(shù)的設(shè)計(jì)與應(yīng)用 The need for new high-frequency, solid-state circuitdesign techniques has been recognized both by microwaveengineers and circuit designers. These engineersare being asked to design solid state circuitsthat will operate at higher and higher frequencies.The development of microwave transistors andAgilent Technologies’ network analysis instrumentationsystems that permit complete network characterizationin the microwave frequency rangehave greatly assisted these engineers in their work.The Agilent Microwave Division’s lab staff hasdeveloped a high frequency circuit design seminarto assist their counterparts in R&D labs throughoutthe world. This seminar has been presentedin a number of locations in the United States andEurope.From the experience gained in presenting this originalseminar, we have developed a four-part videotape, S-Parameter Design Seminar. While the technologyof high frequency circuit design is everchanging, the concepts upon which this technologyhas been built are relatively invariant.The content of the S-Parameter Design Seminar isas follows:

標(biāo)簽： S參數(shù)

上傳時(shí)間： 2013-12-19

上傳用戶：aa54

LPC1850 Cortex-M3內(nèi)核微控制器數(shù)據(jù)手冊

The LPC1850/30/20/10 are ARM Cortex-M3 based microcontrollers for embeddedapplications. The ARM Cortex-M3 is a next generation core that offers systemenhancements such as low power consumption, enhanced debug features, and a highlevel of support block integration.The LPC1850/30/20/10 operate at CPU frequencies of up to 150 MHz. The ARMCortex-M3 CPU incorporates a 3-stage pipeline and uses a Harvard architecture withseparate local instruction and data buses as well as a third bus for peripherals. The ARMCortex-M3 CPU also includes an internal prefetch unit that supports speculativebranching.The LPC1850/30/20/10 include up to 200 kB of on-chip SRAM data memory, a quad SPIFlash Interface (SPIFI), a State Configuration Timer (SCT) subsystem, two High-speedUSB controllers, Ethernet, LCD, an external memory controller, and multiple digital andanalog peripherals.

標(biāo)簽： Cortex-M 1850 LPC 內(nèi)核微控制器

上傳時(shí)間： 2014-12-31

上傳用戶：zhuoying119

LPC4300系列ARM雙核微控制器產(chǎn)品數(shù)據(jù)手冊

The LPC4350/30/20/10 are ARM Cortex-M4 based microcontrollers for embeddedapplications. The ARM Cortex-M4 is a next generation core that offers systemenhancements such as low power consumption, enhanced debug features, and a highlevel of support block integration.The LPC4350/30/20/10 operate at CPU frequencies of up to 150 MHz. The ARMCortex-M4 CPU incorporates a 3-stage pipeline, uses a Harvard architecture withseparate local instruction and data buses as well as a third bus for peripherals, andincludes an internal prefetch unit that supports speculative branching. The ARMCortex-M4 supports single-cycle digital signal processing and SIMD instructions. Ahardware floating-point processor is integrated in the core.The LPC4350/30/20/10 include an ARM Cortex-M0 coprocessor, up to 264 kB of datamemory, advanced configurable peripherals such as the State Configurable Timer (SCT)and the Serial General Purpose I/O (SGPIO) interface, two High-speed USB controllers,Ethernet, LCD, an external memory controller, and multiple digital and analog peripherals

標(biāo)簽： 4300 LPC ARM 雙核微控制器

上傳時(shí)間： 2013-10-28

上傳用戶：15501536189

單片機(jī)12864液晶時(shí)鐘顯示程序

12864液晶時(shí)鐘顯示程序 LCD 地址變量 ;**************變量的定義***************** RS             BIT      P2.0            ;LCD數(shù)據(jù)/命令選擇端(H/L) RW             BIT      P2.1          ;LCD讀/寫選擇端(H/L) EP             BIT      P2.2            ;LCD使能控制 PSB        EQU P2.3 RST        EQU P2.5 PRE            BIT      P1.4            ;調(diào)整鍵(K1) ADJ            BIT      P1.5            ;調(diào)整鍵(K2) COMDAT         EQU P0 LED        EQU P0.3 YEAR           DATA      18H            ;年,月,日變量 MONTH          DATA      19H DATE           DATA      1AH WEEK           DATA      1BH HOUR           DATA      1CH            ;時(shí),分,秒,百分之一秒變量 MIN            DATA      1DH SEC            DATA      1EH SEC100         DATA      1FH STATE          DATA      23H LEAP           BIT      STATE.1            ;是否閏年標(biāo)志1--閏年，0--平年 KEY_S          DATA      24H            ;當(dāng)前掃描鍵值 KEY_V          DATA      25H            ;上次掃描鍵值 DIS_BUF_U0      DATA      26H            ;LCD第一排顯示緩沖區(qū) DIS_BUF_U1      DATA      27H DIS_BUF_U2      DATA      28H DIS_BUF_U3      DATA      29H DIS_BUF_U4      DATA      2AH DIS_BUF_U5      DATA      2BH DIS_BUF_U6      DATA      2CH DIS_BUF_U7      DATA      2DH DIS_BUF_U8      DATA      2EH DIS_BUF_U9      DATA      2FH DIS_BUF_U10     DATA      30H DIS_BUF_U11     DATA      31H DIS_BUF_U12     DATA      32H DIS_BUF_U13     DATA      33H DIS_BUF_U14     DATA      34H DIS_BUF_U15     DATA      35H DIS_BUF_L0      DATA      36H            ;LCD第三排顯示緩沖區(qū) DIS_BUF_L1      DATA      37H DIS_BUF_L2      DATA      38H DIS_BUF_L3      DATA      39H DIS_BUF_L4      DATA      3AH DIS_BUF_L5      DATA      3BH DIS_BUF_L6      DATA      3CH DIS_BUF_L7      DATA      3DH DIS_BUF_L8      DATA      3EH DIS_BUF_L9      DATA      3FH DIS_BUF_L10     DATA      40H DIS_BUF_L11     DATA      41H DIS_BUF_L12     DATA      42H DIS_BUF_L13     DATA      43H DIS_BUF_L14     DATA      44H DIS_BUF_L15     DATA      45H FLAG            DATA      46H ;1-年，2-月，3-日，4-時(shí)，5-分，6-秒，7-退出調(diào)整。 DIS_H           DATA      47H DIS_M           DATA      48H DIS_S           DATA      49H

標(biāo)簽： 12864 單片機(jī) 液晶時(shí)鐘 顯示程序

上傳時(shí)間： 2013-11-09

上傳用戶：xingisme

Foundation入門—仿真

Explain how to open the Waveform Viewer for Verification ? State how to insert nodes into the Waveform Viewer ? Tell how to assign Stimulus with the Stimulator Selector

標(biāo)簽： Foundation 仿真

上傳時(shí)間： 2013-11-05

上傳用戶：gps6888

XAPP143-利用Verilog來創(chuàng)建CPLD設(shè)計(jì)

This Application Note covers the basics of how to use Verilog as applied to ComplexProgrammable Logic Devices. Various combinational logic circuit examples, such asmultiplexers, decoders, encoders, comparators and adders are provided. Synchronous logiccircuit examples, such as counters and state machines are also provided.

標(biāo)簽： Verilog XAPP CPLD 143

上傳時(shí)間： 2013-11-11

上傳用戶：y13567890

開關(guān)電源EMI設(shè)計(jì)(英文版)

Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic Institute and State Universityin partial fulfillment of the requirements for the degree of Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This work presents the modeling and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit model is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the model, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal models are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.

標(biāo)簽： EMI 開關(guān)電源 英文

上傳時(shí)間： 2013-11-16

上傳用戶：萍水相逢

基于EKF的異步電機(jī)直接轉(zhuǎn)矩控制系統(tǒng)

為了提高直接轉(zhuǎn)矩控制（DTC）系統(tǒng)定子磁鏈估計(jì)精度，降低電流、電壓測量的隨機(jī)誤差，提出了一種基于擴(kuò)展卡爾曼濾波（EKF）實(shí)現(xiàn)異步電機(jī)轉(zhuǎn)子位置和速度估計(jì)的方法。擴(kuò)展卡爾曼濾波器是建立在基于旋轉(zhuǎn)坐標(biāo)系下由定子電流、電壓、轉(zhuǎn)子轉(zhuǎn)速和其它電機(jī)參量所構(gòu)成的電機(jī)模型上，將定子電流、定子磁鏈、轉(zhuǎn)速和轉(zhuǎn)子角位置作為狀態(tài)變量，定子電壓為輸入變量，定子電流為輸出變量，通過對磁鏈和轉(zhuǎn)速的閉環(huán)控制提高定子磁鏈的估計(jì)精度，實(shí)現(xiàn)了異步電機(jī)的無速度傳感器直接轉(zhuǎn)矩控制策略，仿真結(jié)果驗(yàn)證了該方法的可行性,提高了直接轉(zhuǎn)矩的控制性能。 Abstract:  In order to improve the Direct Torque Control（DTC） system of stator flux estimation accuracy and reduce the current， voltage measurement of random error， a novel method to estimate the speed and rotor position of asynchronous motor based on extended Kalman filter was introduced. EKF was based on d-p axis motor and other motor parameters （state vector: stator current， stator flux linkage， rotor angular speed and position； input: stator voltage； output: staror current). EKF was designed for stator flux and rotor speed estimation in close-loop control. It can improve the estimated accuracy of stator flux. It is possible to estimate the speed and rotor position and implement asynchronous motor drives without position and speed sensors. The simulation results show it is efficient and improves the control performance.

標(biāo)簽： EKF 異步電機(jī) 直接轉(zhuǎn)矩 控制系統(tǒng)

上傳時(shí)間： 2015-01-02

上傳用戶：qingdou

邏輯分析儀中timing state的應(yīng)用

標(biāo)簽： timing state 邏輯分析儀

上傳時(shí)間： 2013-11-01

上傳用戶：ouyang426

單片機(jī)12864液晶時(shí)鐘顯示程序

12864液晶時(shí)鐘顯示程序 LCD 地址變量 ;**************變量的定義***************** RS             BIT      P2.0            ;LCD數(shù)據(jù)/命令選擇端(H/L) RW             BIT      P2.1          ;LCD讀/寫選擇端(H/L) EP             BIT      P2.2            ;LCD使能控制 PSB        EQU P2.3 RST        EQU P2.5 PRE            BIT      P1.4            ;調(diào)整鍵(K1) ADJ            BIT      P1.5            ;調(diào)整鍵(K2) COMDAT         EQU P0 LED        EQU P0.3 YEAR           DATA      18H            ;年,月,日變量 MONTH          DATA      19H DATE           DATA      1AH WEEK           DATA      1BH HOUR           DATA      1CH            ;時(shí),分,秒,百分之一秒變量 MIN            DATA      1DH SEC            DATA      1EH SEC100         DATA      1FH STATE          DATA      23H LEAP           BIT      STATE.1            ;是否閏年標(biāo)志1--閏年，0--平年 KEY_S          DATA      24H            ;當(dāng)前掃描鍵值 KEY_V          DATA      25H            ;上次掃描鍵值 DIS_BUF_U0      DATA      26H            ;LCD第一排顯示緩沖區(qū) DIS_BUF_U1      DATA      27H DIS_BUF_U2      DATA      28H DIS_BUF_U3      DATA      29H DIS_BUF_U4      DATA      2AH DIS_BUF_U5      DATA      2BH DIS_BUF_U6      DATA      2CH DIS_BUF_U7      DATA      2DH DIS_BUF_U8      DATA      2EH DIS_BUF_U9      DATA      2FH DIS_BUF_U10     DATA      30H DIS_BUF_U11     DATA      31H DIS_BUF_U12     DATA      32H DIS_BUF_U13     DATA      33H DIS_BUF_U14     DATA      34H DIS_BUF_U15     DATA      35H DIS_BUF_L0      DATA      36H            ;LCD第三排顯示緩沖區(qū) DIS_BUF_L1      DATA      37H DIS_BUF_L2      DATA      38H DIS_BUF_L3      DATA      39H DIS_BUF_L4      DATA      3AH DIS_BUF_L5      DATA      3BH DIS_BUF_L6      DATA      3CH DIS_BUF_L7      DATA      3DH DIS_BUF_L8      DATA      3EH DIS_BUF_L9      DATA      3FH DIS_BUF_L10     DATA      40H DIS_BUF_L11     DATA      41H DIS_BUF_L12     DATA      42H DIS_BUF_L13     DATA      43H DIS_BUF_L14     DATA      44H DIS_BUF_L15     DATA      45H FLAG            DATA      46H ;1-年，2-月，3-日，4-時(shí)，5-分，6-秒，7-退出調(diào)整。 DIS_H           DATA      47H DIS_M           DATA      48H DIS_S           DATA      49H

標(biāo)簽： 12864 單片機(jī) 液晶時(shí)鐘 顯示程序

上傳時(shí)間： 2013-12-25

上傳用戶：wvbxj