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improves

Grammatica is a C# and Java parser generator (compiler compiler). It improves upon simlar tools (lik

Grammatica is a C# and Java parser generator (compiler compiler). It improves upon simlar tools (like yacc and ANTLR) by creating well-commented and readable source code, by having automatic error recovery and detailed error messages, and by support for testing and debugging grammars without generating source code. It supports LL(k) grammars with an unlimited number of look-ahead tokens.

標簽： compiler Grammatica generator improves

上傳時間： 2015-01-11

上傳用戶：stella2015
介紹幾種cpuThe 8xC251SA/SB/SP/SQ improves on the MCS-51 architecture and peripheral features, introducin

介紹幾種cpuThe 8xC251SA/SB/SP/SQ improves on the MCS-51 architecture and peripheral features, introducing the advanced register based CPU architecture i.e., the MCS 251 microcontroller architecture. The register based CPU supports a 40-byte register file. In addition, the 8xC251SA/SB/SP/SQ microcontroller has 256-Kbyte expanded external code/data memory space and 64-Kbyte stack space. The new controller is also specially designed to execute C code efficiently. More importantly, the 8xC251SA/SB/SP/SQ maintains binary code compatibility with MCS 51 microcontrollers but at the same time allows the use of the powerful MCS 251 microcontroller instruction set, with many new 8, 16 and 32 bit instructions available. The 8xC251SA/SB/SP/SQ has 512 bytes or 1 Kbyte of on-chip data RAM options and is available in 16 Kbytes and 8 Kbytes of on-chip ROM/OTPROM or ROMless options.

標簽： architecture introducin peripheral improves

上傳時間： 2015-03-15

上傳用戶：ccclll
W-CDMA Power supply dramatically improves transmit efficiency

W-CDMA Power supply dramatically improves transmit efficiency

標簽： dramatically efficiency improves transmit

上傳時間： 2014-11-29

上傳用戶：mhp0114
The TLE2425 improves input regulation as well as output regulation

The TLE2425 improves input regulation as well as output regulation

標簽： regulation improves output input

上傳時間： 2013-12-23

上傳用戶：libenshu01
高功率，雙橋芯片L293, L293E 和L298N如何簡化設計和提高步進電機驅動電路的可靠性

In addition to simplifying design problems, a family of dedicatedchips improves stepper-motor drive-

標簽： L293E L298N 293 高功率

上傳時間： 2013-05-25

上傳用戶：stella2015
DN1011 簡單高效率隔離型反激式電源

While simplicity and high effi ciency (for cool running) areno longer optional features in isolated power supplies, itis traditionally diffi cult to achieve both. Achieving higheffi ciency often requires the use of advanced topologiesand home-brewed secondary synchronous rectifi cationschemes once reserved only for higher power applications.This only adds to the parts count and to the designcomplexity associated with the reference and optocouplercircuits typically used to maintain isolation. Fortunately, abreakthrough IC makes it possible to achieve both high efficiency and simplicity in a synchronous fl yback topology.The LT®3825 simplifi es and improves the performance oflow voltage, high current fl yback supplies by providingprecise synchronous rectifi er timing and eliminating theneed for optocoupler feedback while maintaining excellentregulation and superior loop response.

標簽： 1011 DN 高效率隔離型

上傳時間： 2013-10-16

上傳用戶：wayne595
兩相同步降壓型控制器具有輕負載逐級遞減模式

Today’s computer, datacom, and telecom systems demandpower supplies that are effi cient, respond quicklyto load transients and accurately regulate the voltageat the load. For example, load current can be measuredby using the inductor DCR, thus eliminating the needfor a dedicated sense resistor. Inductor DCR sensingincreases effi ciency—especially at heavy load—whilereducing component cost and required board space.The LTC®3856 single-output 2-phase synchronous buckcontroller improves the accuracy of inductor DCR sensingby compensating for changes in DCR due to temperature.

標簽： 同步降壓型減控制器負載

上傳時間： 2013-11-05

上傳用戶：guobing703
使用新電源模塊改進表面貼裝可制造性

The latest generation of Texas Instruments (TI) boardmountedpower modules utilizes a pin interconnect technologythat improves surface-mount manufacturability.These modules are produced as a double-sided surfacemount(DSSMT) subassembly, yielding a case-less constructionwith subcomponents located on both sides of theprinted circuit board (PCB). Products produced in theDSSMT outline use the latest high-efficiency topologiesand magnetic-component packaging. This providescustomers with a high-efficiency, ready-to-use switchingpower module in a compact, space-saving package. Bothnonisolated point-of-load (POL) switching regulators andthe isolated dc/dc converter modules are being producedin the DSSMT outline.TI’s plug-in power product line offers power modules inboth through-hole and surface-mount packages. The surfacemountmodules produced in the DSSMT outline use asolid copper interconnect with an integral solder ball fortheir

標簽： 電源模塊可制造性表面貼裝

上傳時間： 2013-10-10

上傳用戶：1184599859
基于MSP430單片機的智能水位計設計

　　為解決我國水位監測野外條件下長期無人看守的問題，研制開發了基于MSP430單片機的智能水位計。從其組成到各功能分別進行了詳細的介紹，該智能水位計不僅實現了水位數據的實時監測、記錄和定期采集等多種工作模式，而且提高了水位監測精度，實現了水位監測的智能化。　　Abstract: 　　In order to solve the problems of long-term unmanned observation in the field water monitoring，an intelligence water-level meter based on MSP430 is developed composition and every function moduce of the water level meter was introduced in detail. It not only realizes water level data collection and storage， regularly gathering and so on， but also improves the water-level precision ， finally realizes the intelligence.

標簽： MSP 430 單片機水位計

上傳時間： 2013-11-17

上傳用戶：417313137
基于ATmega8的雙軸太陽跟蹤器設計

為提高太陽能的利用率，以ATmega8單片機為控制核心，設計了一套光電跟蹤與視日運動軌跡跟蹤互補控制的雙軸太陽跟蹤器。該跟蹤器在晴天時，利用光敏電阻采集光強判斷太陽位置,控制步進電機實現光電跟蹤；在陰天時，采集時鐘器件PCF8583的時間信息,計算當前太陽位置來實現視日運動軌跡跟蹤。實驗表明：該太陽跟蹤器能在不同天氣狀況下對太陽進行較準確地跟蹤，能量接收效率提高了30%，達到充分利用太陽能的目的。 Abstract: To improve the utilization rate of solar energy，a kind of solar tracking controller which effectively combined the sun angle tracking and photo electric tracking based on ATmega8is designed.In the sunny days，the solar tracking con-troller determines the sun's position by using photosensitive resistances to collect light intensity and control stepper motors to achieve photo electric tracking，n cloudy days，it collects clock chip PCF8583time information to calculate the current position of the sun and achieve the sun angle tracking.Experimental results show the solar tracking controller accurately tracks the sun in different weather conditions，improves received energy efficiency by30%and reaches the purpose of full use of solar energy.

標簽： ATmega8 跟蹤器

上傳時間： 2013-10-15

上傳用戶：urgdil

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improves

Grammatica is a C# and Java parser generator (compiler compiler). It improves upon simlar tools (lik

介紹幾種cpuThe 8xC251SA/SB/SP/SQ improves on the MCS-51 architecture and peripheral features, introducin

W-CDMA Power supply dramatically improves transmit efficiency

The TLE2425 improves input regulation as well as output regulation

高功率，雙橋芯片L293, L293E 和L298N如何簡化設計和提高步進電機驅動電路的可靠性

DN1011 簡單高效率隔離型反激式電源

兩相同步降壓型控制器具有輕負載逐級遞減模式

使用新電源模塊改進表面貼裝可制造性

基于MSP430單片機的智能水位計設計

基于ATmega8的雙軸太陽跟蹤器設計