RESISTOR
10000
-/24+
原装现货,提供BOM配单服务
RESISTOR
15800
-/24+
旋尔只做进口原装,假一赔十...
RESISTOR
8700
-/2021+
原装现货
RESISTOR
3000
-/N/A
原装正品热卖,价格优势
RESISTOR
10000
-/25+
提供一站式配单服务
RESISTOR
8000
-/22+
原装现货,配单能手
RESISTOR
5000
-/23+
优势产品大量库存原装现货
RESISTOR
3880
-/23+
原装现货需要的加QQ3552671880 2987726803
RESISTOR
48000
-/24+
原装现货,可开专票,提供账期服务
RESISTOR
228000
NR/2017+
诚研翔科技,配单公司,可开增值税发票
RESISTOR
5000
-/14+/15+
原装正品,配单能手
RESISTOR
897800
603/-
原厂发货进口原装微信同步QQ893727827
RESISTOR
41101
-/-
大量现货,提供一站式配单服务
RESISTOR
79500
-/2019+
原装欢迎询价
RESISTOR
5190
-/21+
中研正芯,只做原装
RESISTOR
60701
-/24+
深圳原装现货,可看货可提供拍照
RESISTOR
65286
-/21+
全新原装现货,长期供应,免费送样
RESISTOR
5000
-/22+
只有原装,提供一站配套服务
RESISTOR
6608
-/2024+
现货假一罚万只做原装现货
10.8v至24v输入电压范围 * 为单个3.3v led供电,提供350ma (典型)电流(其它led配置结构,请按照设计步骤进行设计) * 29v (典型值)阳极对地的最大开路电压 * 262khz开关频率 * 逐周期限流 * 通/断控制输入 * 允许使用低频pwm信号调节亮度 * 可以调整电路以适应多种形式的串联、并联led配置 典型应用电路 注意:当+vled和-vled不与led连接时,请勿给电路供电。 元件列表 电路拓扑 ±1% resistor (0603) ±1% resistor (0603) ±5% resistor (0603) ±1% resistor (0603) ±1% resistor (0603) ±5% resistor (0603) ±1% resistor (0805) 3 0.1?f ±10%, 50v x7r ceramic capacitor (0603) tdk c1608x7r1h104 2 499k ±1% resistor (0603) 2 1 ±1% re
chottky diodes mbr0530 sod123 on semiconductor 2 d3 40v, 3a schottky diode mbrs340 smc on semiconductor 1 d4 40v, 2a schottky diode mbrs240 smb on semiconductor 1 l1, l2 4.7μh inductors ihlp2525-cz 6.86mm x 6.47mm x 3.18mm vishay 1 r1, r11 100kω resistors smd, 1%, 0.125w 603 vishay 2 r2 6.8ω resistor smd, 1%, 0.125w 603 vishay 1 r3 4.7ω resistor smd, 1%, 0.125w 603 vishay 1 r4, r8, r10 1.18kω resistors smd, 1%, 0.125w 603 vishay 3 r5, r9 27.4kω resistors smd, 1%, 0.125w 603 vishay 2 r6 10kω res
s thermal performance and allows for hand or machine soldering. the lmz14203h can accept an input voltage rail between 6v and 42v and deliver an adjustable and highly accurate output voltage as low as 5v. the lmz14203h only requires three external resistors and four external capacitors to complete the power solution. the lmz14203h is a reliable and robust design with the following protection features: thermal shutdown, input under-voltage lockout, output over-voltage protection, short-circuit protecti
macrocell tester (t&mt) interface to be connected to a usb link to validate the transceiver. fig 1 shows the isp1506 eval board. 2.1 功能 fully complies with universal serial bus specification rev. 2.0 on-chip 1.5 kω pull-up resistor on dp and 15 kω pull-down resistors on dp and dm; optional external 1.5 kω low-speed pull-up resistor on dm provided on-board on-chip 45 ω resistors on dp and dm for high-speed termination all utmi+ static signals are accessed using register map 60
notes:using a thermistor in the position shown makes a heat activated sensor. a change in temperature willalter the output of the opamp and energize the relay and light the led. swapping the position of thethermistor and 47k resistor makes a cold or frost alarm. 〖文章转载或出处〗≡中国电子技术信息网 来源:xiangxueqin
s an ideal driver for high brightness 1-w or 3-w led. the device has a wide input voltage range to support application with input voltage from multi-cell batteries or regulated 5-v, 12-v power rails. the led current is set with an external sensor resistor r3, and the feedback voltage that is regulated to 200-mv by current mode pwm (pulse width modulation) control loop, as shown in the typical application. the device supports analog and pure pwm dimming methods for led brightness control. connecting a
diodes and leds) 国际整流器公司international rectifier w3.3102 54 sqm 高性能数字、模拟混合集成电路、先进电路器件、功率系统、基准mosfet 宏微科技macmic w3.3108 54 sqm 分立器件、功率模块、芯片产品 立承德科技(深圳)有限公司nexteck technology (shenzhen) limited w3.3634 54 sqm 精密电阻 foil resistor、功率电阻 power resistor、电阻合金resistance alloy、靶材 sputtering target、氧化铟锡材料 ito materials 欧姆龙电子部件贸易(上海)有限公司omron electronic components trading (shanghai) ltd. branch w3.3502 54 sqm 继电器、连接器、传感器、开关 recom asia w3.3640 54 sqm dc/dc convert
惠普(hp)于美国股市31日盘后宣布,该公司已经跟南韩内存芯片大厂hynix semiconductor inc.签订联合开发协议,双方将携手开发新材料以及制程整合技术,将一种名为忆阻器(memory resistor;简称「memristor」)的新型电路组件商用化为新型非挥发性电阻式随机存取内存「reram」。 惠普指出,reram耗电量极低,数据传递速度快过目前的固态硬盘(solid-state)技术,有机会取代目前广泛应用于手机、mp3播放机的闪存(flash memory)。此外,reram也可当作通用的储存媒介,充当闪存、dram甚至是硬盘机。 惠普31日在正常交易时段下跌0.29%,收38.45美元;盘后上涨0.39%至38.60美元。
esistance )。 在物质中,电荷流动可能会遭遇到类似机械的摩擦力般的阻力。这种阻力是 起因于电子与晶格原子或杂质原子之间的碰撞,这种情况会使电能转换成热能。 任何电路或装置,常因发热而消耗电功率。电阻发热而消耗电功率,并非一无是 处,需视其是否有用而定。有些电路就是利用电阻的特性来作功的,例如我们可 利用电热器取得热能;但是晶体管发热则非吾人所需,就属于能量的浪费了。 电阻可用来限制电流量,也可用来调整电压,还有其它的一些功能,专门制 造用来作这些工作的器具称为电阻器( resistor )。 电阻的定义 一电路欲阻止电流通过,同时使电能转换为热能之性质,谓之电阻。电阻以 表示,单位为欧姆或简称欧,以希腊字母 ω ( omega )表示。导体内部有大量 的自由电子,当电压施于导体的两端时,会导致电流的产生,但此一电流不可能 无限制的增加,此乃因为当电荷流经某一材料时,必承受其电阻,此种阻力被消 耗转变成为热能了。 电阻的种类 (1) 各种物质之电阻 各种物质均有大小不等的电阻值,因其电阻之不同,可分别归属于导体、绝缘 体、不良导体及半导体四种材料。 (2
施加于压敏电阻器两端的电压小于其压敏电压,其导电属于热激发电子电导机理。因此,压敏电阻器相当于一个10mω以上的绝缘电阻(rb远大于rg),这时通过压敏电阻器的阻性电流仅为微安级,可看作为开路。该区域是电路正常运行时压敏电阻器所处的状态。 “压敏电阻是中国大陆的名词,意思是"在一定电流电压范围内电阻值随电压而变",或者是说"电阻值对电压敏感"的阻器。相应的英文名称叫“voltage dependent resistor”简写为“vdr”。 压敏电阻器的电阻体材料是半导体,所以它是半导体电阻器的一个品种。现在大量使用的"氧化锌"(zno)压敏电阻器,它的主体材料有二价元素(zn)和六价元素氧(o)所构成。所以从材料的角度来看,氧化锌压敏电阻器是一种“ⅱ-ⅵ族氧化物半导体”。 在中国台湾,压敏电阻器是按其用途来命名的,称为"突波吸收器"。压敏电阻器按其用途有时也称为“电冲击(浪涌)抑制器(吸收器)”。 一、氧化锌压敏电阻器微观结构及特性 氧化锌压敏电阻器是一种以氧化锌为主体、添加多种金属氧化物、经典型的电子陶瓷工艺制成的多晶半导体陶瓷元件。它的微观结构如图1所示。氧化锌陶瓷是由氧化
元件bom表: r1 1.5k ¼ watt resistor (optional, tie pins 6 & 5 of ic1 together if not used.) r2,r3 0.1 ohm 10 watt resistor (tech america 900-1002) r4 270 ohm ¼ watt resistor r5 680 ohm ¼ watt resistor r6,r7 0.15 ohm 10 watt resistor (tech america 900-1006) r8 2.7k ¼ watt resistor r9 1k trimmer potentiometer (rs271-280) r10 3.3k ¼ watt resistor c1,c2,c3,c4 4700 microfarad electrolytic capacitor 35 volt (observe polarity) c5 100 picofarad ceramic disk capacitor c6 1
固态特斯拉线圈/高电压发生器电路 材料bom表: r1 27 ohm 5w resistor or 27 ohm 10w resistor r2 240 ohm 5w resistor or 240 ohm 10w resistor br1 50 volt, 6 amp bridge rectifier c1 8000uf, 35 volt capacitor q1, q2 2n3055 npn power transistor t1 24v 5a transformer (see "notes") t2 tv flyback transformer (see "notes") s1 115v 3a spst switch misc case, wire, heatsinks, line cord 来源:xienag
vels being directly controlled from the sound card itself. parts list:d1-d4: 1n4001 (4)c1,c20: 1000u cap (2)c2,c11: 47u cap (2)c3,c5,c7,c8,c12,c14,c16,c17,c21,c22: 0.1u cap (10)c4,c6,c13,c15: 10u cap (4)c9,c10,c18,c19: 2200u cap (4)r1,r4,r9,r12: 1m resistor (4)r2,r6,r10,r14: 100k resistor (4)r3,r5,r11,r13: 1k resistor (4)r7,r8,r15,r16: 2r7 resistor (4)ic1: 7812 (1)ic2,ic3: lm1778n (2)spk1,spk2,spk3,spk4: 8r 2 watt speakers (4)
特斯拉线圈(tesla coil)是一种使用共振原理运作的变压器(共振变压器),由美籍塞尔维亚裔科学家尼古拉·特斯拉在1891年发明,主要用来生产超高电压但低电流、高频率的交流电力。特斯拉线圈由两组(有时用三组)偶合的共振电路组成。特斯拉线圈难以界定,尼古拉·特斯拉试行了大量的各种线圈的配置。特斯拉利用这些线圈进行创新实验,如电气照明,荧光光谱,x射线,高频率的交流电流现象,电疗和无线电力,以便进行电力传输。材料bom表: r1 27 ohm 5w resistor or 27 ohm 10w resistor r2 240 ohm 5w resistor or 240 ohm 10w resistor br1 50 volt, 6 amp bridge rectifier c1 8000uf, 35 volt capacitor q1, q2 2n3055 npn power transistor t1 24v 5a transformer (see "notes") t2 tv flyback transformer (see "notes") s1 115v 3a s
ank circuit made from two 5pf capacitors and the inductor. ( click here for colpitt oscillator resonant frequency equation.) frequency is around 100mhz with values shown. audio modulation is fed into the tank circuit via the 5p capacitor, the 10k resistor and 1n4002 controlling the amount of modulation. the oscillator output is fed into the 3.9uh inductor which will have a high impedance at rf frequencies. the output stage operates as a class d amplifier , no direct bias is applied but the rf signal
te of the line is unknown. if the voltage level at the receiver’s a and b inputs is less than ±200 mv the logic level at the output of the receivers will be the value of the last bit received. in order to maintain the proper idle voltage state, bias resistors must be applied to force the data lines to the idle condition. bias resistors are nothing more than a pullup resistor on the data b line (typically to 5 volts) and a pulldown (to ground) on the data a line. figure 2.4 illustrates the placement of b
[234]如果过高的电压加到静电计和皮安计的输入端,会表损坏。大多数仪器有最大输入电压的一项。有的应用中,会不得以超过(此最大电压)。这些应用的一部分将包括:电容泄漏电流和二极管反向泄漏电流,或电缆或薄膜绝缘阻抗泄漏电流。如果元件或材料或被击穿,因所有电压就加到静电计的输入端,极可能造成毁坏。面对这些情况,必须外加过载保护,以防损坏仪器的输入电路。[译者语]film具体指什么?[235]figure 2-22 shows a protection circuit consisting of a resistor and two diodes (in3595). the leakage of the in3595 diode is generally less than one picoampere even with 1mv of forward bias, so the circuit will not interfere with measurements of 10pa or more. this diode is rated to carry 225ma (450ma repeated sur
set up i/o ports. begin mov !ra, #00000100b ;use ra.2 for serial input. mov !rb, #0 ;output to leds. :start_bit snb serial_in ;detect start bit. change to ;sb serial_in if using 22k resistor ;input. jmp :start_bit ;no start bit yet? keep watching. call start_delay ;wait one-half bit time to the middle ;of the start bit. jb serial_in,:start_bit
之同样改变。[9]remember, the transistor's collector current is almost equal to its emitter current, as the α ratio of a typical transistor is almost unity (1). if we have control over the transistor's emitter current by setting diode current with a simple resistor adjustment, then we likewise have control over the transistor's collector current. in other words, collector current mimics, or mirrors, diode current. 不要忘了,通常典型晶体管的系数α几乎是1,因此晶体管集电极电流与发射极电流也几乎是相等的。我们只要简单的调节电阻,设定二极管电流,就能控制晶体管的发射极电流,于是也就能控制晶体管集电极电流。换句
veriloga的table_model你可以使用veriloga的table_model, 下面是一个简单的例子:you can model your time-variant resistor in verilog-a using $table_model as shown in the following example:1. timevaryr.va:`include "constants.h"`include "discipline.h"module timevaryr (a,b);inout a,b;electrical a,b;analog i(a,b) <+ v(a,b)/$table_model($abstime,"res.tbl"); endmodule2. res.tbl:#time resistance1e-9 1e610e-9 120e-9 1e-63. input.scs//simulator lang=spectreglobal 0ahdl_include "ti