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What is an operational amplifier?
An operational amplifier, or op amp, is a device that amplifies analog signals. It uses two inputs: one for power and one for data. It is used in many applications from communications to stereo.
total search295 articles
2008-08-28 Operational amps reject EMI, RF interference
National Semiconductor Corp. has introduced three operational amplifiers (op amps) with integrated EMI filters that maintain the accuracy of analog systems by reducing the effects of RF interference
2009-05-28 Operational amplifier stability compensation methods for capacitive loading applied to TS507
This application note simplifies the task of designing an application that includes the TS507. It spares you the time-consuming effort of trying numerous combinations on bench, and it is also much more accurate than using Spice models which are not designed to study system stability, even though they can give a general trend.
2011-04-19 Op amplifier boasts lowest-noise, zero-drift
Analog Devices has released the ADA4528 zero-drift operational amplifier designed for instrumentation and medical applications that require precision over time and temperature without system calibration.
2005-08-24 ON Semi enters high-speed operational amplifier market
ON Semiconductor announced its entry into the high-speed operational amplifier market with the introduction of four new devices designed for the growing low-power video apps space
2004-10-29 Intersil amplifier breaks 1GHz barrier
The first triple amplifier touted to break the 1GHz amplifier barrier was recently announced by Intersil
2001-04-04 Integrated operational amplifier theory
This application note covers the basic operational amplifier, as it is defined, along with test methods and suggestive applications. It also includes a basic coverage of the feedback theory from which all configurations can be analyzed.
1999-04-08 How to choose CMOS operational amplifiers
This paper discusses the features and applications using CMOS operational amplifiers
2008-10-21 Gain and linearity testing for precision operational amplifiers
Many op amps are very linearas a unity-gain inverter, they often have linearity in the range of 5 to 1 to 0.5ppm. Test procedures will be shown here, to permit any user to resolve the non-linearity errors.
2007-10-01 Extend current-sense amplifier's input range down to 0V
Adding a charge pump provides 5V supply rails to the operational amplifier internal to a high-side current-sense amplifier.
2007-04-23 Decompensated operational amplifiers
This paper discusses the what, why, and where of decompensated operational amplifiers and describes external compensation techniques, such as reducing loop gain, to stabilize op amps operated at gains less than the minimum stable gain specified in the datasheet
2010-08-12 8bit microcontroller embeds flash memory, integrates comparator, amplifier
Fujitsu Semiconductor Asia has expanded its F2MC-8FX family of high-performance 8-bit microcontrollers with embedded flash memory with the 32-pin MB95430H series featuring built-in analog comparator and operational amplifier.
2002-04-02 TI logarithmic amplifier provides 20-bit dynamic range
The LOG102 logarithmic amplifier measures the log ratio of input currents from 1nA to 1mA with 0.5 percent accuracy and produces an output voltage of change of 1V for each decade change of input current
2012-04-24 Signal chain basics: How 20W amplifier can ruin a speaker system
Know the causes of this surprisingly common problem, and how to work around them.
2006-04-25 PFC controller chips simplify system design, cut operational cost
System General's new PFC controller chips help customers simplify power system design while reducing overall operational costs
2005-08-19 New broadband microwave amplifier can be remotely controlled
AR Worldwide's newest broadbanded linear amplifier has a number of hooks that are likely to make it user-friendly, especially in the lab and on the factory floor
2012-02-07 Lengthen operational lifetime of hybrid/EV battery packs (Part 1
Find out how to avoid charge imbalance that can reduce a battery pack's total capacity and potentially damage the pack.
2013-02-20 Designing high-temperature differential amplifier
Here's a low cost and high performance design idea for dealing with current and next-generation control applications that require devices to function at temperatures greater than 200C.
2005-06-15 Create amplifier, converter combinations with WEBENCH
The latest version of National Semiconductor's WEBENCH online design environment is said to enable engineers to select and tune optimal signal-path applications in minutes.
2005-05-26 AR Worldwide RF amplifier powers 100kHz to 250MHz apps
AR Worldwide has introduced its 1,000W model 1000A250 power amplifier designed for the 100kHz to 250MHz frequency range
2002-03-25 Some tips on stabilizing operational amplifiers
This application note discusses the stable operation and maintenance of a feedback amplifier wherein it exhibits a condition with no oscillations, no overshoot and no peak in the closed loop response
2011-03-22 LMH730316 SOT23-5 / SOT23-6 amplifier evaluation board
The LMH730316 evaluation board is designed to aid in the characterization of National Semiconductor's high speed and / or low distortion operational amplifiers
2009-08-04 Zero-drift op amp uses 30% less power
The ADA4051-2 is a chopper-stabilized operational amplifier designed for portable and battery-powered instruments.
2011-08-18 Zero-drift op amp delivers low noise of 8.8nV/rtHz
TI's dual-channel OPA2188 targets high- and low-voltage supply applications needing ultra-high precision, such as test and measurement equipment and electronic weigh scales.
2008-09-19 Video amps enhance images, capacity of HDTVs
Analog Devices has launched three high-performance video amplifiers that bring higher levels of picture quality and power efficiency to HDTV and video equipment.
2014-03-06 Utilising audio amps for voltage splitting
Here's a look at several voltage splitters built around power audio amplifiers.
2005-04-04 Universal Amplifiers
Linear Technology has introduced a new class of amplifier family that provides various functions without using any external components
2006-11-17 TI op-amps tout breakthrough performance
TI touts its two new precision op-amps as breakthrough performers for test and measurement, instrumentation, imaging, medical, audio and process control applications.
2002-08-14 TI op amps offer low distortion, unity gain stability
The THS4271/5 series of op amps offers a unity gain stability with 1.4GHz unity-gain bandwidth, 900V/5s slew rate, distortion of -84dBc (2Vpp output, 30MHz) and a 2.8nV/sqrt-Hz voltage noise density.
2002-07-18 TI op amps have 3005A quiescent current
The OPA334 and OPA335 zero-drift op amps from Texas Instruments Inc. feature a quiescent current of 3005A, making them suitable for use in power-sensitive apps.
2002-12-02 TI op amps eye DSL, video apps
Texas Instruments Inc. has expanded its Burr-Brown product line with the addition of a series of op amps that are suitable as DSL line drivers.
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