在脉冲中子氧活化测井仪中,伽马射线时间谱的采集是仪器至为关键的部分。伽马射线时间谱采集电路常用的设计采用单片机与CPLD组合的方案,CPLD实现伽马射线计数,单片机则负责数据的处理、传输等工作。基于单片PSoC芯片的新方案,设计了伽马射线时间谱采集电路,实现了同样的功能。功能考核和高温考核证明,该方案有效、可靠,解决了高温CPLD价格昂贵且难以购买的问题,同时还能减少采集电路体积和成本。
上传时间: 2014-12-23
上传用户:希酱大魔王
利用pHEMT工艺设计了一个2~4 GHz宽带微波单片低噪声放大器电路。本设计中采用了具有低噪声、较高关联增益、pHEMT技术设计的ATF-54143晶体管,电路采用二级级联放大的结构形式,利用微带电路实现输入输出和级间匹配,通过ADS软件提供的功能模块和优化环境对电路增益、噪声系数、驻波比、稳定系数等特性进行了研究设计,最终使得该LNA在2~4 GHz波段内增益大于20 dB,噪声小于1.2 dB,输出电压驻波比小于2,达到了设计指标的要求。
上传时间: 2014-07-03
上传用户:远远ssad
本电路针对过程控制应用提供一款完全可编程的通用模拟前端(AFE),支持2/3/4线RTD配置、带冷结补偿的热电偶输入、单极性和双极性输入电压、4 mA至20 mA输入,串行控制的8通道单刀单掷开关ADG1414用于配置选定的测量模式。
上传时间: 2013-10-23
上传用户:taozhihua1314
C2000™ MCU 系列采用了 32 位架构、先进的外围电路和模拟集成,可在多种应用中实现完美的性能和实时控制。独特且功能齐全的外围电路包括一个无以伦比的单片 12.5-MSPS ADC、高分辨率 PWM、增强型捕获单元等等。根据对系统的限制,如最低的待机电流、成本要求或最小的解决方案尺寸需求,TI 提供最佳的产品为使用 C2000 MCU 的系统提供支持。
上传时间: 2013-10-27
上传用户:yepeng139
朱立荣 硕士 DC-DC效率分析与设计
上传时间: 2013-11-19
上传用户:kang1923
进入90年代以来,各种单片真有效值/直巍(TRMS/PC)转换器正在国内外迅速推广应用,构成具有高性价比的各种真有效值仪表。本文重点介绍AD6 37的工作原理与典型应用。
上传时间: 2014-12-24
上传用户:asdfasdfd
The LTC®3414 offers a compact and efficient voltage regulatorsolution for point of load conversion in electronicsystems that require low output voltages (down to 0.8V)from a 2.5V to 5V power bus. Internal power MOSFETswitches, with only 67mW on-resistance, allow theLTC3414 to deliver up to 4A of output current with efficiencyas high as 94%. The LTC3414 saves space by operatingwith switching frequencies as high as 4MHz, enabling theuse of tiny inductors and capacitors.
上传时间: 2014-01-03
上传用户:dongbaobao
Easy-to-use and compact point-of-load power suppliesare necessary in systems with widely distributed, highcurrent, low voltage loads. The LTC®3415 provides acompact, simple and versatile solution. It includes a pairof integrated complementary power MOSFETs (32mΩtop and 25mΩ bottom) and requires no external senseresistor. A complete design requires an inductor andinput/output capacitors, and that’s it. The result is a fast,constant frequency, 7A current mode DC/DC switchingregulator.
上传时间: 2013-10-18
上传用户:avensy
Automotive batteries, industrial power supplies, distributedsupplies and wall transformers are all sources ofwide-ranging high voltage inputs. The easiest way to stepdown these sources is with a high voltage monolithicstep-down regulator that can directly accept a wide inputrange and produce a well-regulated output. The LT®3493accepts inputs from 3.6V to 36V and LT3481 acceptsinputs from 3.6V to 34V. Both provide excellent lineand load regulation and dynamic response. The LT3481offers a high effi ciency solution over a wide load range andkeeps the output ripple low during Burst Mode® operationwhile the LT3493 provides a tiny solution with minimalexternal components. The LT3493 operates at 750kHzand the LT3481 has adjustable frequency from 300kHzto 2.8MHz. High frequency operation enables the use ofsmall, low cost inductors and ceramic capacitors.
上传时间: 2014-12-24
上传用户:Pzj
单片机按键播放三首乐曲
上传时间: 2013-11-04
上传用户:hakim