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amplifiers What is an amplifier? Search results

What is an amplifier?
A device that uses a small amount of energy to control a larger amount. The relationship of the input to the output, expressed as a function of the input frequency, is called the transfer function of the amplifier, and the magnitude of the transfer function is called the gain.
total search2072 articles
2005-07-14 New CMOS amplifiers with voltage noise like bipolar amplifiers
Linear Technology announced a new class of CMOS amplifiers with voltage noise like bipolar amplifiers
2004-06-11 National unveils amplifiers for portable comm, video apps
The new high-speed LMH amplifiers from National are designed for apps requiring high-speed performance with very low power consumption.
2002-02-01 National Semiconductor amplifiers exhibit low noise, draw low power
Based on the company's VP10 process, the LMH6622/LMH6639/LMH6644 amplifiers offer low noise, low power and high bandwidth for communications and other high-speed applications.
2004-11-12 National introduces WEBENCH environment for audio amplifiers
National Semiconductor Corp. has expanded its WEBENCH online design environment to include audio amplifiers, providing the industry's first online tool created to speed the selection, design and evaluation of many types of audio amplifiers for a variety of applications.
2002-06-05 National IC integrates speaker, headphone amplifiers
National Semiconductor Corp. has announced the release of the LM4854 IC that integrates the company's Boomer stereo headphone amplifier with a mono speaker amplifier to form a single-chip solution for portable electronic devices.
2002-04-05 National headphone amplifiers eliminate output capacitors
National Semiconductor Corp. has released two Boomer stereo headphone amplifiers that eliminate output coupling capacitors needed for headphone applications, thereby making the amplifiers suited for use in portable devices such as cellphones, PDAs, and MP3 players.
2004-11-24 National DC/DC converters target RF power amplifiers
National launched a family of DC/DC converters that is designed for powering RF power amplifiers from a single Li-ion battery.
2003-03-10 Mitsubishi to deploy amplifiers from HighWave
Mitsubishi Electric Corp. has selected HighWave Optical Technologies Ltd's optical amplifiers to be deployed in inter-city metro-ring networks in Japan, through Mitsubishi's all-optical DWDM platform.
2002-02-05 Maxim video amplifiers require 6.6mA
The MAX4389/90/92/93/94/95/96 video amplifiers require only 6.5mA of quiescent supply current while achieving 145MHz -3dB bandwidth.
2005-12-14 Maxim unveils 'first true HD video filter amplifiers'
The MAX9500 and MAX9501 from Maxim Integrated Products are touted to be the world's first true high-definition video filter amplifiers.
2002-11-04 Maxim current-sense amplifiers handle 76V
The MAX4080/MAX4081 high-side, current-sense amplifiers handle voltages up to 76V and accurately monitor currents in high-voltage apps.
2004-12-01 Maxim audio DAC with built-in DirectDrive headphone amplifiers
Maxim Integrated Products expanded its line of audio integrated circuits with the release of the MAX9850 stereo audio DAC.
2003-12-31 Maxim audio amplifiers eye PC displays
Maxim Integrated Products has introduced the MAX9713/MAX9714 mono and stereo class-D audio amplifiers.
2004-04-22 Maxim amplifiers with programmable LOS indicator
Maxim Integrated Products has developed the MAX3747 and MAX3747A limiting amplifiers with a programmable loss-of-signal indicator.
2004-11-22 M/A-COM amplifiers target military, avionics markets
M/A-COM released its family of Ka-band triplers, X-band variable gain amplifiers and Ka-band power amplifiers.
2008-09-16 Low-pass filters/amplifiers offer high signal capacity
Linear Technology has introduced a family of four high-performance, dual fixed-frequency, low-pass active filters/amplifiers targeting an array of wireless communications and industrial signal processing equipment applications.
2007-08-22 Logarithmic amplifiers need no external attenuators
Maxim's new logarithmic amplifiers provide a choice of three different input-voltage ranges, eliminating the need for external attenuators and thus simplifying amplifier control-loop design.
2004-11-01 Linear Tech amplifiers with on-board precision resistors
Linear Tech released two amplifiers as a response to today's demands for flexible design solutions to support a wide variety of apps.
2006-06-02 LDMOS transistors bias control in basestation RF power amplifiers using Intersil's LUT-based sensor signal conditioners
A new way to bias an LDMOS amplifier is presented here, which involves digitally converting temperature information and adjusting the DC bias using look-up table memory.
2007-04-23 Integrated DC logarithmic amplifiers
This article derives the overall DC log amp transfer function from the VBE-to-IC transfer characteristic of bipolar transistors.
2008-12-01 Integrate video signal capacity with high-speed amplifiers
The composite video signal in the 1950s still has a large influence in today's HD A/D video. Most parameters related to composite video remain major considerations in a system design.
2002-07-01 Improving audio with Class D amplifiers
Class D amplifiers employing pulse width modulation are popular because of their efficiency and simplicity in improving audio systems.
2008-01-23 Implementing digital lock-in amplifiers using the dsPIC DSC
This application note provides information on practical ways in which a digital lock-in amplifier can be implemented in software using the dsPIC33FJ256GP710 on an Explorer 16 board.
2002-01-21 IBM rolls out SiGe RF power amplifiers
The 800MHz 2022 TDMA IS-54, 2018 CDMA IS-95, and 1900MHz 2017 PCS/CDMA IS-95 power amplifiers are expected to reduce the cost of assembly and board sizes of mobile devices.
2011-02-14 Hybrid amplifiers target CATV infrastructure systems
Anadigics' SOT115J hybrid CATV amplifier package consists of a Class A, balanced, highly linear GaAs amplifier, providing high gain, low noise figure, and low distortion.
2007-07-09 How to level shift video signals for DC-coupled video amplifiers/filters
This application note describes a method to level shift a -0.3V to 0.7V video signal to 0 to 1V.
1999-04-08 How to choose CMOS operational amplifiers
This paper discusses the features and applications using CMOS operational amplifiers.
2003-05-27 How to characterize CATV amplifiers effectively
This application note shows how to effectively evaluate CATV amplifier performance using the Agilent Technologies 4396B network/spectrum/impedance analyzer.
2008-09-02 High-speed amplifiers offer flexible video bandwidth
Cadeka has launched seven current feedback and voltage feedback high-speed amplifiers that the company claims may break the price-performance curve, which improves signal stability and increases signal fidelity in high-definition, professional and broadcast video applications.
1999-06-29 High-efficiency audio amplification using class-D audio power amplifiers
The paper deals with audio amplifiers based on a Class-D topology, its advantages with portable audio applications and the potential problems these amplifiers incur when designing without linear audio amplifiers in PDAs, multimedia notebooks, and other portable battery operated equipment.
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