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单精度浮点型(float),在C++中,单精度浮点型(float)专指占用32位存储空间的单精度(single-precision)值。单精度在一些处理器上比双精度更快而且只占用双精度一半的空间,但是当值很大或很小的时候,它将变得不精确。当你需要小数部分并且对精度的要求不高时,单精度浮点型的变量是有用的。例如,当表示美元和分时,单精度浮点型是有用的。在foxpro中,单精度浮点型是为了提供兼容性,浮点数据类型在功能上等价于数值型。
  • MAX1447

    MAX1447  3.5- and 4.5-Digit, single-Chip ADCs with LED Drivers

    标签: 1447 MAX

    上传时间: 2020-11-12

    上传用户:

  • AT89S52-24单片机最小系统开发板ALTIUM设计硬件原理图+PCB文件 2层板设计 大小为1

    AT89S52-24单片机最小系统开发板ALTIUM设计硬件原理图+PCB文件,2层板设计,大小为121x149mm,Altium Designer 设计的工程文件,包括完整的原理图及PCB文件,可以用Altium(AD)软件打开或修改,可作为你的产品设计的参考。主要器件型号列表如下:Library Component Count : 14Name                Description----------------------------------------------------------------------------------------------------AT89S52-P           8 位微处理器/40引脚CAP                 CapacitorCAPACITOR POL       CapacitorCRYSTAL             CrystalD Connector 9       Receptacle Assembly, 9 Position, Right AngleHeader 2            Header, 2-PinHeader 4            Header, 4-PinHeader 5X2          Header, 5-Pin, Dual rowLED                 MAX232PZ_9                排针——9RES2SW-DPST             Double-Pole, single-Throw SwitchSW-PB               Switch

    标签: at89s52 单片机

    上传时间: 2021-11-17

    上传用户:

  • AT89S52单片机主8入8出继电器工控主板ALTIUM设计硬件原理图+PCB文件

    AT89S52单片机主8入8出继电器工控主板ALTIUM设计硬件原理图+PCB文件,2层板设计,大小为121x149mm,Altium Designer 设计的工程文件,包括完整的原理图及PCB文件,可以用Altium(AD)软件打开或修改,可作为你的产品设计的参考。主要器件型号列表如下:Library Component Count : 25Name                Description----------------------------------------------------------------------------------------------------24LC02AJKG                按键开关AT89S52-P           8 位微处理器/40引脚CAP                 CapacitorCAPACITOR POL       CapacitorCPDR                瓷片电容CRYSTAL             CrystalD Connector 9       Receptacle Assembly, 9 Position, Right AngleDG                  电感DJDR                电解电容GO                  光耦Header 5X2          Header, 5-Pin, Dual rowJDQYCK              继电器——1常开1常闭LED                 发光二极管LM2576HVT-3.3       Simple Switcher 3A Step Down Voltage RegulatorMAX232              NPN                 NPN Bipolar TransistorPZ_2                排针——2PZ_3                排针——3RES2Res                 电阻Res PZ_8            8位排阻SW-DPST             Double-Pole, single-Throw SwitchWY2JG               稳压二级管ZL2JG               整流二极管

    标签: at89s52 继电器

    上传时间: 2021-11-17

    上传用户:kingwide

  • 50W隔离型离线式DC.pdf

    ABSTRACTThe flyback power stage is a popular choice for single and multiple output dc-to-dc converters at powerlevels of 150 Watts or less. Without the output inductor required in buck derived topologies, such as theforward or push-pull converter, the component count and cost are reduced. This application note will reviewthe design procedure for the power stage and control electronics of a flyback converter. In these isolatedconverters, the error signal from the secondary still needs to cross the isolation boundary to achieveregulation. By using the UC3965 Precision Reference with Low Offset Error Amplifier on the secondaryside to drive an optocoupler and the UCC3809 Economy Primary Side Controller on the primary side, asimple and low cost 50 Watt isolated power supply is realized.

    标签: 隔离

    上传时间: 2021-11-24

    上传用户:kingwide

  • ad9280_9708 ADDA模块硬件资料+PDF原理图+AD PADS CADENCE3中格式原

    ad9280_9708 ADDA模块硬件资料+PDF原理图+AD、PADS、CADENCE3中格式原理图库PCB封装库文件:原理图库:Library Component Count : 41Name                Description----------------------------------------------------------------------------------------------------AD8065ARTAD9280ARSZRL        AD9708ARUZB5S_0               C1608CT2012_0            CT2012_0_1INDUCTOR            INDUCTOR_1          LED_0               LED GRN SGL 25MA 0603LQH32C_0            LQH32C_0_1          MC34063AD           1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS, -40 to 85℃RES_ADJ_0           single Turn Top Adjust, 3362PTL072               TLV1117-33          IC REG LDO 3.3V 1A SOT223ZDIODE_0            DIODE ZNR -- 0.2W 5.1V AEC-Q101 SOD523PCB封装库:Component Count : 17Component Name-----------------------------------------------3386P-1C0603DIP-2X20_2P54EC6P3L0603L1210L7373LED0603R0603R2512SMASMA_THVT_312X312SOP8SOT23-5SOT223SSOP28_0R65_10R2X7R8TSSOP28_0R65_9R7X4R4

    标签: ads cadence

    上传时间: 2021-12-04

    上传用户:

  • TMS320F28035 DSP最小核心板开发板ALTIUM设计原理图 无PCB板图

    TMS320F28035 DSP最小核心板开发板ALTIUM设计原理图,无PCB板图。原理图已在项目中使用,包括CAN通信电路和瓷隔离电路等,可以做为你的设计参考,所用器件型号如下:ADUM1201AT24CXXBAV99               R26010005CAP                 CapacitorHeader 4            Header, 4-PinHeader 4X2          Header, 4-Pin, Dual rowINDUCTORL2                  LM317               R25040043NTC                 R27040030OPTOISORES                 R20190049RES1                SN65HVD230/SO8SW-SPST             single-Pole, single-Throw SwitchTL431TMS320F28035-80XTAL                Crystal Oscillator

    标签: tms320f28035 dsp

    上传时间: 2021-12-22

    上传用户:trh505

  • 汽车通讯SENT协议J2716_2016版

    SENT(single Edge Nibble Transmission,单边半字节传输)协议(如SAE J2716)适用于汽车及运输行业中对安全性要求严格和对成本敏感的应用。

    标签: 汽车通讯 sent协议

    上传时间: 2022-01-05

    上传用户:

  • RTL8201CP 规格书

    C10018_RTL8201CP-VD-LF_2012-11-22.PDFsingle-CHIP/single-PORT 10/100M FAST ETHERNET PHYCEIVER (With Auto Crossover) DATASHEET 

    标签: rtl8201cp

    上传时间: 2022-01-13

    上传用户:xsr1983

  • AD8605/AD8606/AD8608 运算放大器DataSheet

    Precision, Low Noise, CMOS, Rail-to-Rail, Input/Output Operational Amplifiers Data Sheet AD8605/AD8606/AD8608The AD8605, AD8606, and AD86081 are single, dual, and quad rail-to-rail input and output, single-supply amplifiers. They feature very low offset voltage, low input voltage and current noise, and wide signal bandwidth. They use the Analog Devices, Inc. patented DigiTrim® trimming technique, which achieves

    标签: 运算放大器

    上传时间: 2022-02-02

    上传用户:

  • PW4556_2.0.pdf规格书下载

    The PW4556 series of devices are highly integrated Li-Ion and Li-Pol linear chargers targetedat small capacity battery for portable applications. It is a complete constant-current/ constantvoltage linear charger. No external sense resistor is needed, and no blocking diode is required dueto the internal MOSFET architecture. It can deliver up to 300mA of charge current (using a goodthermal PCB layout) with a final float voltage accuracy of ±1%. The charge voltage is fixed at 4.2V or4.35V, and the charge current can be programmed externally with a single resistor. The chargerfunction has high accuracy current and voltage regulation loops and charge termination

    标签: pw4556

    上传时间: 2022-02-11

    上传用户:1208020161