•Founded in Jan. 08, 2001 in Shanghai, China.•Fabless IDH focused on Analog & Mixed Signal Chip design & marketing •Over 100 IC introduced.•Over 200 OEM Customer worldwide•ISO-9000 Certified•Distribution Channel in Taiwan, China & Japan To achieve 100% customer satisfactionby producing the technically advanced product with the best quality, on-time delivery and service. Leverages on proprietary process and world-class engineering team to develop innovative & high quality analog solutions that add value to electronics equipment.
標(biāo)簽： Circuit Analog Design Porta
上傳時(shí)間： 2013-10-24
上傳用戶：songnanhua
使用時(shí)鐘PLL的源同步系統(tǒng)時(shí)序分析一）回顧源同步時(shí)序計(jì)算Setup Margin = Min Clock Etch Delay – Max Data Etch Delay – Max Delay Skew – Setup TimeHold Margin = Min Data Etch Delay – Max Clock Etch Delay + Min Delay Skew + Data Rate – Hold Time下面解釋以上公式中各參數(shù)的意義：Etch Delay：與常說(shuō)的飛行時(shí)間(Flight Time)意義相同，其值并不是從仿真直接得到，而是通過(guò)仿真結(jié)果的后處理得來(lái)。請(qǐng)看下面圖示：圖一為實(shí)際電路，激勵(lì)源從輸出端，經(jīng)過(guò)互連到達(dá)接收端，傳輸延時(shí)如圖示Rmin，Rmax，F(xiàn)min，F(xiàn)max。圖二為對(duì)應(yīng)輸出端的測(cè)試負(fù)載電路，測(cè)試負(fù)載延時(shí)如圖示Rising，F(xiàn)alling。通過(guò)這兩組值就可以計(jì)算得到Etch Delay 的最大和最小值。
標(biāo)簽： PLL 時(shí)鐘 同步系統(tǒng) 時(shí)序分析
上傳時(shí)間： 2013-11-05
上傳用戶：VRMMO
One of the strengths of Synplify is the Finite State Machine compiler. This is a powerfulfeature that not only has the ability to automatically detect state machines in the sourcecode, and implement them with either sequential, gray, or one-hot encoding. But alsoperform a reachability analysis to determine all the states that could possibly bereached, and optimize away all states and transition logic that can not be reached.Thus, producing a highly optimal final implementation of the state machine.
標(biāo)簽： Synplicity Machine Verilog Design
上傳時(shí)間： 2013-10-23
上傳用戶：司令部正軍級(jí)
Linear Technology’s high performance battery management ICsenable long battery life and run time, while providing precision charging control, constantstatus monitoring and stringent battery protection. Our proprietary design techniques seamlesslymanage multiple input sources while providing small solution footprints, faster charging and100% standalone operation. Battery and circuit protection features enable improved thermalperformance and high reliability operation.
上傳時(shí)間： 2013-10-13
上傳用戶：yyq123456789
此提出了一種基于Matlab／Simulink及實(shí)時(shí)代碼生成工具R哪(Real．Time Workshop)的電力電子與電力傳動(dòng)控制系統(tǒng)軟件的設(shè)計(jì)方法。首先在Simulink下搭建控制系統(tǒng)模型，進(jìn)行相應(yīng)仿真完善，驗(yàn)證控制算法，根據(jù)目標(biāo)DSP型號(hào)添加相應(yīng)DSP內(nèi)核、外設(shè)并設(shè)置控制參數(shù)，然后直接將模型轉(zhuǎn)化為相應(yīng)DSP的C源代碼．在相應(yīng)的硬件平臺(tái)支持下即可完成相關(guān)實(shí)驗(yàn)。
上傳時(shí)間： 2013-11-04
上傳用戶：wincoder
高的工作電壓高達(dá)100V N雙N溝道MOSFET同步驅(qū)動(dòng) The D810DCDC is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The D810DCDC uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit, without requiring a sense resistor. A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifi er provides very fast line and load transient response. Large 1Ω gate drivers allow the D810DCDC to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. Integrated bias control generates gate drive power from the input supply during start-up and when an output shortcircuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher effi ciency.
上傳時(shí)間： 2013-10-24
上傳用戶：wd450412225
Battery powered applications that have a signifi cantamount of time in standby mode, require electrical circuitsto operate with a low quiescent current to preserve batterylife. The LTC3835 synchronous step-down controlleris an excellent solution with its ultralow quiescent current(80μA). Other features make it uniquely qualifi ed tosatisfy the needs of automotive applications. A wide 4Vto 36V input voltage range protects the supply againsthigh input voltage transients and is compatible with lowvoltage cold crank conditions. The constant frequencycurrent-mode architecture with high-side inductor current
上傳時(shí)間： 2013-11-20
上傳用戶：stewart·
Alkaline batteries are convenient because they’re easy tofi nd and relatively inexpensive, making them the powersource of choice for portable instruments and devicesused for outdoor recreation. Their long shelf life alsomakes them an excellent choice for emergency equipmentthat may see infrequent use but must be ready to go on amoment’s notice. It is important that the DC/DC convertersin portable devices operate over the widest possiblebattery voltage range to extend battery run time, and thussave the user from frequent battery replacement.
標(biāo)簽： 428 DN 同步升壓 轉(zhuǎn)換器
上傳時(shí)間： 2014-12-24
上傳用戶：569342831
Industrial remote monitoring systems and keep-alivecircuits spend most of their time in standby mode. Manyof these systems also depend on battery power, so powersupply effi ciency in standby state is very important tomaximize battery life. The LT®8410/-1 high effi ciencyboost converter is ideal for these systems, requiringonly 8.5μA of quiescent current in standby mode. Thedevice integrates high value (12.4M/0.4M) output feedbackresistors, signifi cantly reducing input current whenthe output is in regulation with no load. Other featuresinclude an integrated 40V switch and Schottky diode,output disconnect with current limit, built in soft-start,overvoltage protection and a wide input range, all in atiny 8-pin 2mm × 2mm DFN package.
標(biāo)簽： 465 DN 超低功耗 升壓轉(zhuǎn)換器
上傳時(shí)間： 2013-11-23
上傳用戶：新手無(wú)憂
The LTC3546 is a dual output current mode buck regulatorwith fl exible output current partitioning. Beyondthe advantages normally associated with dual outputregulators (reduced size, cost, EMI and part count, withimproved effi ciency), the LTC3546’s outputs can bepartitioned for either 3A and 1A outputs, or two 2A outputs.This increases its application range and simplifi esmultiple supply rail designs. A confi gurable Burst Mode®clamp for each output sets the current transition levelbetween Burst Mode operation and forced continuousconduction mode to optimize effi ciency over the entireoutput range. An adjustable switching frequency up to4MHz and internal power MOSFET switches allow forsmall and compact footprints.
上傳時(shí)間： 2013-11-04
上傳用戶：yxgi5
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