RESISTOR
228000
NR/2017+
誠(chéng)研翔科技,配單公司,可開(kāi)增值稅發(fā)票
RESISTOR
6608
-/2024+
現(xiàn)貨假一罰萬(wàn)只做原裝現(xiàn)貨
RESISTOR
65286
-/21+
全新原裝現(xiàn)貨,長(zhǎng)期供應(yīng),免費(fèi)送樣
RESISTOR
5000
-/23+
優(yōu)勢(shì)產(chǎn)品大量庫(kù)存原裝現(xiàn)貨
RESISTOR
2000
-/25+
只做原裝,支持賬期,提供一站式配單服務(wù)
RESISTOR
N/A
00+/9014
-
RESISTOR
10000
-/25+
提供一站式配單服務(wù)
RESISTOR
5190
-/21+
中研正芯,只做原裝
RESISTOR
25850
-/16+
原裝現(xiàn)貨長(zhǎng)期供應(yīng)
RESISTOR
9200
-/23+
只做原裝更多數(shù)量在途訂單
RESISTOR
8000
-/22+
原裝現(xiàn)貨,配單能手
RESISTOR
60701
-/24+
深圳原裝現(xiàn)貨,可看貨可提供拍照
RESISTOR
3000
-/N/A
原裝正品熱賣(mài),價(jià)格優(yōu)勢(shì)
RESISTOR
5000
-/25+
提供BOM一站式配單服務(wù)
RESISTOR
3588
-/-
原裝 部分現(xiàn)貨量大期貨
RESISTOR
41101
-/-
大量現(xiàn)貨,提供一站式配單服務(wù)
RESISTOR
5000
-/14+/15+
原裝正品,配單能手
RESISTOR
92700
-/23+
原裝現(xiàn)貨,支持BOM配單服務(wù)
RESISTOR
5480
-/22+
原裝
10.8v至24v輸入電壓范圍 * 為單個(gè)3.3v led供電,提供350ma (典型)電流(其它led配置結(jié)構(gòu),請(qǐng)按照設(shè)計(jì)步驟進(jìn)行設(shè)計(jì)) * 29v (典型值)陽(yáng)極對(duì)地的最大開(kāi)路電壓 * 262khz開(kāi)關(guān)頻率 * 逐周期限流 * 通/斷控制輸入 * 允許使用低頻pwm信號(hào)調(diào)節(jié)亮度 * 可以調(diào)整電路以適應(yīng)多種形式的串聯(lián)、并聯(lián)led配置 典型應(yīng)用電路 注意:當(dāng)+vled和-vled不與led連接時(shí),請(qǐng)勿給電路供電。 元件列表 電路拓?fù)?±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. 〖文章轉(zhuǎn)載或出處〗≡中國(guó)電子技術(shù)信息網(wǎng) 來(lái)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) 國(guó)際整流器公司international rectifier w3.3102 54 sqm 高性能數(shù)字、模擬混合集成電路、先進(jìn)電路器件、功率系統(tǒng)、基準(zhǔn)mosfet 宏微科技macmic w3.3108 54 sqm 分立器件、功率模塊、芯片產(chǎn)品 立承德科技(深圳)有限公司nexteck technology (shenzhen) limited w3.3634 54 sqm 精密電阻 foil resistor、功率電阻 power resistor、電阻合金resistance alloy、靶材 sputtering target、氧化銦錫材料 ito materials 歐姆龍電子部件貿(mào)易(上海)有限公司omron electronic components trading (shanghai) ltd. branch w3.3502 54 sqm 繼電器、連接器、傳感器、開(kāi)關(guān) recom asia w3.3640 54 sqm dc/dc convert
惠普(hp)于美國(guó)股市31日盤(pán)后宣布,該公司已經(jīng)跟南韓內(nèi)存芯片大廠hynix semiconductor inc.簽訂聯(lián)合開(kāi)發(fā)協(xié)議,雙方將攜手開(kāi)發(fā)新材料以及制程整合技術(shù),將一種名為憶阻器(memory resistor;簡(jiǎn)稱「memristor」)的新型電路組件商用化為新型非揮發(fā)性電阻式隨機(jī)存取內(nèi)存「reram」。 惠普指出,reram耗電量極低,數(shù)據(jù)傳遞速度快過(guò)目前的固態(tài)硬盤(pán)(solid-state)技術(shù),有機(jī)會(huì)取代目前廣泛應(yīng)用于手機(jī)、mp3播放機(jī)的閃存(flash memory)。此外,reram也可當(dāng)作通用的儲(chǔ)存媒介,充當(dāng)閃存、dram甚至是硬盤(pán)機(jī)。 惠普31日在正常交易時(shí)段下跌0.29%,收38.45美元;盤(pán)后上漲0.39%至38.60美元。
esistance )。 在物質(zhì)中,電荷流動(dòng)可能會(huì)遭遇到類(lèi)似機(jī)械的摩擦力般的阻力。這種阻力是 起因于電子與晶格原子或雜質(zhì)原子之間的碰撞,這種情況會(huì)使電能轉(zhuǎn)換成熱能。 任何電路或裝置,常因發(fā)熱而消耗電功率。電阻發(fā)熱而消耗電功率,并非一無(wú)是 處,需視其是否有用而定。有些電路就是利用電阻的特性來(lái)作功的,例如我們可 利用電熱器取得熱能;但是晶體管發(fā)熱則非吾人所需,就屬于能量的浪費(fèi)了。 電阻可用來(lái)限制電流量,也可用來(lái)調(diào)整電壓,還有其它的一些功能,專(zhuān)門(mén)制 造用來(lái)作這些工作的器具稱為電阻器( resistor )。 電阻的定義 一電路欲阻止電流通過(guò),同時(shí)使電能轉(zhuǎn)換為熱能之性質(zhì),謂之電阻。電阻以 表示,單位為歐姆或簡(jiǎn)稱歐,以希臘字母 ω ( omega )表示。導(dǎo)體內(nèi)部有大量 的自由電子,當(dāng)電壓施于導(dǎo)體的兩端時(shí),會(huì)導(dǎo)致電流的產(chǎn)生,但此一電流不可能 無(wú)限制的增加,此乃因?yàn)楫?dāng)電荷流經(jīng)某一材料時(shí),必承受其電阻,此種阻力被消 耗轉(zhuǎn)變成為熱能了。 電阻的種類(lèi) (1) 各種物質(zhì)之電阻 各種物質(zhì)均有大小不等的電阻值,因其電阻之不同,可分別歸屬于導(dǎo)體、絕緣 體、不良導(dǎo)體及半導(dǎo)體四種材料。 (2
施加于壓敏電阻器兩端的電壓小于其壓敏電壓,其導(dǎo)電屬于熱激發(fā)電子電導(dǎo)機(jī)理。因此,壓敏電阻器相當(dāng)于一個(gè)10mω以上的絕緣電阻(rb遠(yuǎn)大于rg),這時(shí)通過(guò)壓敏電阻器的阻性電流僅為微安級(jí),可看作為開(kāi)路。該區(qū)域是電路正常運(yùn)行時(shí)壓敏電阻器所處的狀態(tài)。 “壓敏電阻是中國(guó)大陸的名詞,意思是"在一定電流電壓范圍內(nèi)電阻值隨電壓而變",或者是說(shuō)"電阻值對(duì)電壓敏感"的阻器。相應(yīng)的英文名稱叫“voltage dependent resistor”簡(jiǎn)寫(xiě)為“vdr”。 壓敏電阻器的電阻體材料是半導(dǎo)體,所以它是半導(dǎo)體電阻器的一個(gè)品種?,F(xiàn)在大量使用的"氧化鋅"(zno)壓敏電阻器,它的主體材料有二價(jià)元素(zn)和六價(jià)元素氧(o)所構(gòu)成。所以從材料的角度來(lái)看,氧化鋅壓敏電阻器是一種“ⅱ-ⅵ族氧化物半導(dǎo)體”。 在中國(guó)臺(tái)灣,壓敏電阻器是按其用途來(lái)命名的,稱為"突波吸收器"。壓敏電阻器按其用途有時(shí)也稱為“電沖擊(浪涌)抑制器(吸收器)”。 一、氧化鋅壓敏電阻器微觀結(jié)構(gòu)及特性 氧化鋅壓敏電阻器是一種以氧化鋅為主體、添加多種金屬氧化物、經(jīng)典型的電子陶瓷工藝制成的多晶半導(dǎo)體陶瓷元件。它的微觀結(jié)構(gòu)如圖1所示。氧化鋅陶瓷是由氧化
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
固態(tài)特斯拉線圈/高電壓發(fā)生器電路 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 來(lái)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)
特斯拉線圈(tesla coil)是一種使用共振原理運(yùn)作的變壓器(共振變壓器),由美籍塞爾維亞裔科學(xué)家尼古拉·特斯拉在1891年發(fā)明,主要用來(lái)生產(chǎn)超高電壓但低電流、高頻率的交流電力。特斯拉線圈由兩組(有時(shí)用三組)偶合的共振電路組成。特斯拉線圈難以界定,尼古拉·特斯拉試行了大量的各種線圈的配置。特斯拉利用這些線圈進(jìn)行創(chuàng)新實(shí)驗(yàn),如電氣照明,熒光光譜,x射線,高頻率的交流電流現(xiàn)象,電療和無(wú)線電力,以便進(jìn)行電力傳輸。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]如果過(guò)高的電壓加到靜電計(jì)和皮安計(jì)的輸入端,會(huì)表?yè)p壞。大多數(shù)儀器有最大輸入電壓的一項(xiàng)。有的應(yīng)用中,會(huì)不得以超過(guò)(此最大電壓)。這些應(yīng)用的一部分將包括:電容泄漏電流和二極管反向泄漏電流,或電纜或薄膜絕緣阻抗泄漏電流。如果元件或材料或被擊穿,因所有電壓就加到靜電計(jì)的輸入端,極可能造成毀壞。面對(duì)這些情況,必須外加過(guò)載保護(hù),以防損壞儀器的輸入電路。[譯者語(yǔ)]film具體指什么?[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
之同樣改變。[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,通常典型晶體管的系數(shù)α幾乎是1,因此晶體管集電極電流與發(fā)射極電流也幾乎是相等的。我們只要簡(jiǎn)單的調(diào)節(jié)電阻,設(shè)定二極管電流,就能控制晶體管的發(fā)射極電流,于是也就能控制晶體管集電極電流。換句
veriloga的table_model你可以使用veriloga的table_model, 下面是一個(gè)簡(jiǎn)單的例子: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