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尽量减少短路电流脉冲的热插拔控制器-Minimize Sho

尽量减少短路电流脉冲的热插拔控制器-Minimize Sho

Abstract: Because of internal circuit-breaker delay and limited MOS-gate pulldown current, many hot-swap controllers do not limit current during the first 10µs to 50µs following a shorted output. The result can be a brief flow ...

2009-04-29 标签:控制器脉冲热插拔 293

Series Protection for Power-Li

Series Protection for Power-Li

Abstract: This application note describes a circuit that protects an n-channel power MOSFET against low and high voltages. It includes a high-side switch-driver IC and fast-response, 3-transistor, overvoltage detector. Vo...

2009-04-29 标签:Power-Line 429

并联稳压器提高功率放大器的电流限制精度-Shunt Regu

并联稳压器提高功率放大器的电流限制精度-Shunt Regu

Abstract: Substituting a shunt regulator (U1) for the usual transistor in this power-amplifier circuit improves the current-limit accuracy. Adding current-limiting circuitry to an emitter follower protects both the pass t...

2009-04-29 标签:稳压器 606

隔离式电源电信应用-Isolated Power Suppl

隔离式电源电信应用-Isolated Power Suppl

Abstract: Simple easy to use high side current sense amps protects power supplies as a result of irregular supply voltage caused by short-circuit conditions. To ensure compliance with all international standards, the desi...

2009-04-29 标签:电源电信 579

电源故障保护布局-Power-Fault Protectio

电源故障保护布局-Power-Fault Protectio

电源故障保护布局-P...

2009-04-29 标签:电源 335

规格与测量机振荡器噪声集成电路基站混频器-Specifica

规格与测量机振荡器噪声集成电路基站混频器-Specifica

Abstract: Residual phase noise from local oscillators (LO) can be degraded by additive noise of on-chip local oscillator drivers/buffers in integrated circuit mixers. Reciprocal mixing of strong RF signals with the LO noise degrades the re...

2009-04-29 标签:振荡器 278

简单电力场效应管驱动器是孤立的和DC耦合-Simple Po

简单电力场效应管驱动器是孤立的和DC耦合-Simple Po

Abstract: An isolated transformer-driver IC (MAX845) and small external transformer produce an isolated gate-control signal for a power FET. Designers of power electronic circuits must often drive power switches that feed...

2009-04-29 标签:驱动器 317

CCFL推挽式缓冲电路

CCFL推挽式缓冲电路

摘要:DS3984, DS3988, DS3881, DS3882, DS3992和DS3994为冷阴极荧光灯(CCFL)控制器,它们使用推挽结构来产生驱动荧光灯所需的高压交流波形。在推挽式驱动器中,升压变压器的寄生电感与n沟...

2009-04-29 标签:CCFL 792

修改MAX2010电路使其工作在450MHz

修改MAX2010电路使其工作在450MHz

摘要:本应用笔记说明如何对MAX2010 (可调节RF预失真器)标准评估板进行下盖,使其工作频率优化在450Hz。默认情况下,预失真器工作在500MHz至1000MHz,但是,对MAX2010评估板稍做修改,...

2009-04-29 标签:MAX2010 221

修改MAX2010电路使其工作在360MHz

修改MAX2010电路使其工作在360MHz

摘要:本应用笔记说明如何对MAX2010 (可调节RF预失真器)标准评估板进行下盖,使其工作频率优化在360Hz。默认情况下,预失真器工作在500MHz至1100MHz,但是,对MAX2010评估板稍做修改,...

2009-04-29 标签:MAX2010 195

DS1870采用外接电阻时的调节范围/分辨率

DS1870采用外接电阻时的调节范围/分辨率

摘要:DS1870用于射频(RF)功率放大器偏置控制,如果不接外部电阻,采用5V基准,其偏置电压范围为3V至5V。本应用笔记旨在展示如何利用外接电阻达到适当的范围和分辨率。可以利用...

2009-04-28 标签:电阻DS1870 217

利用DS4303为LDMOS RF功率放大器提供偏置

利用DS4303为LDMOS RF功率放大器提供偏置

摘要:LDMOS RF功率放大器因其极高的性价比在GSM和CDMA基站市场占据了主导地位。使用LDMOS放大器时,保证高性能的一个关键因素是补偿栅极偏置电压,以在温度变化时保持恒定的静态...

2009-04-28 标签:放大器 390

数字可调电压基准源-Digitally Adjustable

数字可调电压基准源-Digitally Adjustable

A digitally adjustable voltage reference is useful in many applications. For instance, it can be used to finely tune the reference voltage when absolute accuracy is required or to adjust the reference voltage to match the full-scale voltag...

2009-04-28 标签:电压基准源 751

在便携式应用中数字调整的DC-DC转换器输出电压

在便携式应用中数字调整的DC-DC转换器输出电压

There are many portable applications that optimize circuit performance by adjusting the output voltage of a DC-DC converter. For instance, many microprocessors can operate at a low voltage to save power, and then operate at a high voltage ...

2009-04-28 标签:转换器 575

利用数字电位器的调节降压DC-DC转换器设计-Using D

利用数字电位器的调节降压DC-DC转换器设计-Using D

Abstract: This application note describes how to use a digital potentiometer to generate an adjustable voltage supply using a MAX1776 step-down DC-DC converter. A reference design using the DS3903 is shown that features the ability to prod...

2009-04-28 标签: 618

利用DS1841对数电阻优化雪崩光电二极管(APD)的偏置范

利用DS1841对数电阻优化雪崩光电二极管(APD)的偏置范

摘要:本文阐述了如何使用DS1841对数电位器调节APD偏置电路的输出范围。为了使调节过程更简单,本文还提供了电子数据表。 APD偏置电路DS1841可受温度控制的...

2009-04-28 标签:电阻 275

Inexpensive Peak Detector Feat

Inexpensive Peak Detector Feat

Abstract: This circuit, which uses a digital potentiometer (pot) and a comparator, features droopless operation that is not normally associated with peak detectors that have traditionally used rectifiers and sample-and-holds (S/H). ...

2009-04-28 标签:PeakDetec 454

数模转换器应用-Force/Sense DAC Applic

数模转换器应用-Force/Sense DAC Applic

Abstract: This article discusses application circuits for Maxim force/sense digital-to-analog converters (DACs). Applications include: selectable fixed-gain DAC, programmable gain DAC, photodiode bias control, amperometric sensor control, ...

2009-04-28 标签:转换器 504

利用数字电位器实现按键保持控制

利用数字电位器实现按键保持控制

摘要:许多装置需要一个用户接口来调整温度、背光强度和电源电压等,这个用户接口需要能够避免按键调整中的误操作。若在这些装置中使用一个数字电位器,设计人员可以通过...

2009-04-28 标签:电位器 211

DS1867 Power Supply Conditioni

DS1867 Power Supply Conditioni

DS1867 Pow...

2009-04-28 标签:DS1867 213

半导体数字电位器:常见问题

Abstract: This application note answers frequently asked questions for Dallas Semiconductor digital potentiometers. How do I set up the DS1267 in stacked configuration?Connect the H0 terminal to the L1 terminal...

2009-04-28 标签: 339

求戴维等效电路的EPOT基于偏置电阻网络

求戴维等效电路的EPOT基于偏置电阻网络

Additional Information: EPOT Applications: Offset Adjustment in Op-Amp Circuits To model the network shown below in Figure 1 as the Thevenin equivalent shown below in Figure 2, find the Thevenin Voltage (Vth) and the Thevenin Resis...

2009-04-28 标签:EPOT 202

Creating Non-Linear Transfer F

Creating Non-Linear Transfer F

Abstract: Linear digital potentiometers (pots) can be used in non-linear applications such as adjusting volume control in audio applications. This article discusses how to create a "pseudo-logarithmic" taper digital pot by simply adding a ...

2009-04-28 标签:电位器 272

控制变压电源使用DS1809-Controlling a V

控制变压电源使用DS1809-Controlling a V

Abstract: Semiconductor topic: Many linear and switched-mode power supplies and voltage regulators use a resistor network as feedback into the regulator to adjust the voltage output. This is typically done either by varying the values of t...

2009-04-28 标签:电源 362

2-Wire Controlled Digital DIP

2-Wire Controlled Digital DIP

Abstract: The DS3904 contains three digitally controlled nonvolatile (NV) variable resistors. It has the capability of placing each of the variable resistors into a high-impedance state. Using this feature, it is possible to create a 2-wir...

2009-04-28 标签:Switch 360

External Resistor Minimizes Di

External Resistor Minimizes Di

Abstract: This article discusses how to improve linearity (due to loading of the wiper) and mid-range frequency response of a digital potentiometer in VCO control applications by adding a single external resistor between H and W. ...

2009-04-28 标签:Resistor 306

怎样将数字电位器的带宽从10倍提高到100倍

怎样将数字电位器的带宽从10倍提高到100倍

摘要:本文介绍了一种简单电路,能够将数字电位器的带宽从10倍提高到100倍。利用这一方法,数字电位器可以用于视频带宽的高频应用。 数字电位器(digital pot或digipot)...

2009-04-28 标签: 253

利用数字电位器实现电压-电阻转换

利用数字电位器实现电压-电阻转换

摘要:利用一对相同的数字电位器构建电压-电阻转换方案。 在工业控制和偏置调节电路中有时需要将电压转换成电阻,这一过程在具体实施时有一定的难度。图1所示...

2009-04-28 标签:电阻电位器 682

构建DS1803/DS1805数字电位器的按键控制器

构建DS1803/DS1805数字电位器的按键控制器

摘要:本应用笔记介绍了一种通过几个按键和一个微控制器控制数字电位器DS1803或DS1805阻值的简易方法。 概述本应用笔记介绍了一种使用几个按键和一个微控...

2009-04-28 标签: 1031

区分数字电位器的性能

区分数字电位器的性能

摘要:数字电位器(digipot)能够在各种应用中为模拟电路提供便利的电阻、电压和电流的数字控制与调节。该应用笔记介绍了数字电位器的基本功能,说明了如何改进数字电位器以提...

2009-04-28 标签:电位器 412

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