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通信設(shè)計應(yīng)用
電子發(fā)燒友網(wǎng)本頻道為通信技術(shù)專欄，提供詳細(xì)的通信設(shè)計最新技術(shù)與應(yīng)用；是您學(xué)習(xí)通信技術(shù)知識的好平臺。
布局考慮的非隔離DC - DC轉(zhuǎn)換器-Layout Cons
Abstract: DC-DC converters are an excellent source of electric fields and magnetic fields. Their EMI spectrum begins at the switching frequency and often extends over 100MHz. To minimize capacitive couplings and magnetic couplings care mus...
2009-05-04 標(biāo)簽：轉(zhuǎn)換器 846
R-C Snubbing for the Lab
As the efficiency of power supplies goes up, circuit resistances tend to go down. This can create high-frequency circuits with the potential to generate large voltage overshoots and long decay times. It can cause over-voltage stress in the...
2009-05-04 標(biāo)簽：R-C 1039
Isolated SLIC Supply
Some subscriber line interface cards (SLICs) require power-supply voltages isolated from the local supply. The Figure 1 circuit generates three such isolated voltages from a 5V input: +3.3V at 100mA, -24V at 100mA, and -72V at 25mA. It fea...
2009-05-04 標(biāo)簽：SLIC 1161
Experimenting with the MAX6956
Abstract: This application note describes a PC program, downloadable free, to assist evaluation of the MAX6956 and MAX6957 LED display drivers and GPIO (port expanders). The MAX6956 and MAX6957 are versatile 28-segment LE...
2009-05-04 標(biāo)簽：SPI 1469
選擇數(shù)字和字母顯示配置的MAX6954和MAX6955的SP
Abstract: This application note uses a web based Java program to allow an engineer to simulate the wide range of display configurations of the MAX6954 and MAX6955 serial interfaced LED display drivers. The tool enables the user to check wh...
2009-05-04 標(biāo)簽：MAX6954 1041
加入全球發(fā)光強(qiáng)度控制的MAX6954和MAX6955 LED
Abstract: This application note discusses techniques to change the intensity of all the LED digits of a display at once (global intensity control) driven by the MAX6954 or MAX6955 multiplexed LED drivers. This control is additional to the ...
如何為MAX1470超外差接收機(jī)選擇石英晶體振蕩器
摘要：不同的制造商提供各種形狀與大小的石英晶體，其性能指標(biāo)也各不一樣。這些指標(biāo)包括諧振頻率、諧振模式、負(fù)載電容、串聯(lián)阻抗、 管殼電容以及驅(qū)動電平。本應(yīng)用筆記幫助...
VFD Grid/Anode Supply Using MA
Abstract: This note describes how to use the PUMP clock output of the MAX6850, MAX6851, MAX6852, or MAX6853 vacuum fluorescent display controllers to construct a low-cost boost converter. The dc-dc converter generates the high-voltage grid...
2009-05-04 標(biāo)簽：MAX6850 700
LEDs Are Still Popular (and Im
Abstract: This article reviews LED display technology that has rapidly changed over its 35 years. The origins of LEDs and their traditional applications are discussed. Some new applications for the improved technology are presented. ...
2009-05-04 標(biāo)簽：led 1787
接線的MAX6958/59向4位時鐘顯示-Wiring th
Abstract: This application note provides details on how to connect the MAX6958 and MAX6959 LED display drivers to LED displays for clock applications. Standard 1, 2, 3, and 4 digit displays, off-the-shelf clock displays are discussed. A su...
2009-05-04 標(biāo)簽：MAX6958 999
USB供電高精度Hi - Fi的唱機(jī)前置放大器-USB-Po
Abstract: A quad, low-noise, op amp and LDO are used to build a stereo preamp with RIAA equalization to allow converting signals from a record player (phonograph) to a linear output for digitizing by computer sound cards etc. ...
設(shè)計輸出匹配網(wǎng)絡(luò)，MAX1472 ASK的發(fā)射機(jī)-Desig
The MAX1472 is a crystal-referenced phase-locked loop transmitter designed to transmit OOK/ASK data in the 300MHz to 450MHz frequency range. It supports data rates up to 100kbps. When matched to a 50Ω system, the MAX1472 PA is capable of ...
啟動振蕩器(FOX)提升了超外差性能
摘要：Maxim在單片超外差接收器器件中開發(fā)出了一套獨特的快速啟動振蕩器系統(tǒng)，針對300-450MHz ISM (US)波段的應(yīng)用，接收器通過縮短啟動時間而有效節(jié)省了電池能量?？焖賳诱袷幤?..
2009-05-04 標(biāo)簽：振蕩器 625
簡單的脈沖發(fā)生器具有低組件數(shù)-Simple Pulse Ge
Abstract: With a few op amps and some external components, you can build a pulse generator with variable frequency and duty cycle. The natural choice for generating a pulse of variable frequency and duty cycle is a good b...
2009-05-04 標(biāo)簽：脈沖 1042
PWM至線性信號轉(zhuǎn)換電路
摘要：本文介紹了一種將低電壓PWM信號轉(zhuǎn)換成放大、緩沖后的線性輸出的電路，適用于風(fēng)扇速度控制，允許在3.3V輸入時提供12V風(fēng)扇的線性控制。 Maxim提供各種PWM輸出的...
2009-05-03 標(biāo)簽：PWM 2318
脈寬調(diào)制器工作在不同層次的頻率和功耗-Pulse-Width
Abstract: Build a general-purpose pulse-width modulator using three op amps from a quad-op-amp device. The many applications for pulse-width modulation (PWM) include voltage regulation, power-level control, and fan-speed ...
2009-05-03 標(biāo)簽： 692
利用MAX9489/MAX9471多輸出時鐘發(fā)生器構(gòu)建集成時
摘要：與典型的“本地”時鐘方案相比，集成的多輸出時鐘發(fā)生器有許多優(yōu)勢。本文探討了集中時鐘發(fā)生器(如MAX9489和MAX9471)的優(yōu)點，如：降低系統(tǒng)成本、良好的信號完整性、抑制干...
2009-05-03 標(biāo)簽：MAX9489 761
擴(kuò)頻時鐘發(fā)生器
摘要：降低電磁干擾(EMI)是電子系統(tǒng)設(shè)計人員需要考慮的一個重要因素，擴(kuò)頻時鐘(CLK)為降低EMI提供了一個有效途徑。本文給出了擴(kuò)頻CLK的定義和估算EMI抑制性能的簡單公式。所提供...
2009-05-03 標(biāo)簽：擴(kuò)頻時鐘 957
高效率﹑低成本ISM頻段發(fā)送器中的功放
摘要：在ISM 300MHz至450MHz波段的短波通訊中，低成本的ASK和/或FSK發(fā)送器和收發(fā)器是其核心器件。這些短程通信器件(SRD)的典型應(yīng)用是無線遙控門禁系統(tǒng)(RKE)、胎壓檢測(TPM)、遙控和安全...
2009-05-03 標(biāo)簽：ISM 1231
D類放大器：基本工作原理和近期發(fā)展
摘要：D類放大器的高效特性，使其成為便攜式和大功率應(yīng)用的理想選擇。傳統(tǒng)的D類放大器需要一個外部低通濾波器，以從脈寬調(diào)制信號(PWM)輸出波形中提取音頻信號。然而，許多現(xiàn)...
2009-05-02 標(biāo)簽：放大器 1373
測量4通道解串器的偏移容限
摘要：LVDS解串器的偏移容限用來表示其抖動容限。本應(yīng)用筆記描述了限制偏移容限的條件，并給出了測量4通道解串器偏移容限的步驟。 介紹TLVDS解串器的偏移...
2009-05-02 標(biāo)簽：解串器 961
MAX9257/MAX9258評估板I²C模式工作
摘要：為了獲得成功的硬件設(shè)計，在選擇串行器/解串器(SerDes)元件之前最好針對具體的應(yīng)用進(jìn)行評估。本應(yīng)用筆記提供的設(shè)計指南有助于快速配置MAX9257/MAX9258評估板的I²C模式，逐...
2009-05-02 標(biāo)簽：MAX9257 1860
通過低電壓差分信號(LVDS)傳輸高速信號
摘要：ANSI EIA/TIA-644標(biāo)準(zhǔn)定義的低電壓差分信號(LVDS)非常適合包括時鐘分配、點對點以及多點之間的信號傳輸。本文描述了使用LVDS將高速通訊信號分配到多個目的端的方法。 ...
2009-05-01 標(biāo)簽：lvds 1801
信號完整性與傳輸速率和電纜長度的LVDS串行器-Signal
Abstract: This application note contains an investigation into the signal integrity of serial data links versus cable length. Jitter measurements were performed using the MAX9207/MAX9208 LVDS serializer/deserializer pair using various leng...
2009-05-01 標(biāo)簽：lvds 2787
LVDS串行-解串器在雙絞線電纜數(shù)據(jù)傳輸中的性能分析
利用串行-解串器能夠大大減少近距離、寬帶數(shù)據(jù)通信中的連線，類似的應(yīng)用有電信和網(wǎng)絡(luò)設(shè)備的背板互連、3G蜂窩電話基站中機(jī)架內(nèi)部的互連、數(shù)字視頻接口等。電流模式、低電壓...
2009-05-01 標(biāo)簽：雙絞線 1226
MAX9247/MAX9218串行器/解串器芯片組的性能測試
摘要：高速串行化數(shù)據(jù)連接已廣泛用于網(wǎng)絡(luò)、服務(wù)器和3G基站中的視頻顯示、數(shù)碼相機(jī)和背板數(shù)據(jù)傳輸。Maxim為串行收發(fā)鏈路開發(fā)了各種產(chǎn)品，本應(yīng)用筆記討論了典型的串行器和解串...
2009-05-01 標(biāo)簽：MAX9247 4734
發(fā)射應(yīng)用中多個高速、復(fù)用DAC的同步
摘要：該篇應(yīng)用筆記給出了多個具有多路輸入或集成內(nèi)插濾波器的高速復(fù)用數(shù)模轉(zhuǎn)換器(DAC)的同步方法。這樣的DAC用于I/Q上變頻器或數(shù)字波束成形發(fā)射器中。這些DAC可提供數(shù)據(jù)時鐘輸...
2009-05-01 標(biāo)簽：dac 552
解讀高速數(shù)/模轉(zhuǎn)換器(DAC)的建立和保持時間
摘要：本應(yīng)用筆記定義了高速數(shù)/模轉(zhuǎn)換器(DAC)的建立和保持時間，并給出了相應(yīng)的圖例。高速DAC的這兩個參數(shù)通常定義為“正、負(fù)”值，了解它們與數(shù)據(jù)瞬態(tài)特性之間的關(guān)系是一個...
2009-05-01 標(biāo)簽：轉(zhuǎn)換器dac 454
了解流水線模數(shù)轉(zhuǎn)換器-Understanding Pipel
Abstract: This article explains the architecture and operation of pipelined analog-to-digital converters (ADCs). It discusses key performance characteristics such as architecture, latency, digital error correction, component accuracy, and ...
2009-05-01 標(biāo)簽：轉(zhuǎn)換器 666
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