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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.
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2002-11-18 Zetex amplifier handles 192kHz digital audio signals
Zetex's Acoustar ZXCW8100 two-channel digital audio amplifier controller handles digital audio signals sampled at up to 192kHz via 32-bit data processing.
2005-09-21 Zetex Acoustar technology used in Theta's digital audio amplifier
Zetex and Theta Digital announced that Zetex' Acoustar digital amplifier processing technology is being used to provide unprecedented sound fidelity in Theta's new digital audio amplifierthe Virtu PowerDAC
2009-05-27 Zero-drift instrumentation amplifier (IA) takes the strain out of sensor measurements
This article examines the use of instrumentation amplifiers (IAs) for sensor applications. It highlights system challenges and implementation choices, describes new architectures for IC IAs, and outlines applications such as ratiometric bridges and low-side current sensing.
2010-08-19 WLAN power amplifier is 1.5mm x 1.5mm
Microsemi introduces the new LX5514M power amplifier, a continuation of their WLAN product family expansion for the smartphone market .
2003-10-02 WJ HBT amplifier eyes medium power market
WJ Communications Inc. has introduced a family of InGaP hetero-junction bipolar transistor medium power driver amps that are suitable for wireless apps.
2005-01-07 Wireless transmitter/amplifier works without audio degradation
Amphony's 5.8GHz digital wireless audio transmitter/amplifiers are capable of transmitting audio to loudspeakers wirelessly and without any audio degradation.
2001-04-03 Wideband 300W push-pull FM amplifier using BLV25 transistors
This application note describes a 300W push-pull amplifier design using two BLV25 transistors suitable for transmitters and transposers for the FM broadcast band.
2007-06-19 White LED driver integrates Class AB audio amplifier
Maxim Integrated Products introduces the MAX8678, the industry's only white LED (WLED) driver to combine a highly efficient negative charge pump with a fully differential, bridged audio amplifier.
2005-05-12 W-CDMA gets a boost from dual-band power amplifier module
Fairchild's new W-CDMA power amplifiers is one of the first dual-band W-CDMA PAs that offers a 3-by-3mm footprint
2005-02-09 Video amplifier includes 6dB amplifier, power save circuit
New Japan Radio's dual supply voltage 6-channel video amplifier includes a 6dB amplifier, a 75W driver circuit (2-system drive) and power save circuit.
2006-06-02 VFA, CFA, Bipolar or CMOS - Which high-speed amplifier is best for your low-noise application?
Both current- and voltage-feedback amplifier topologies are popular choices for high-speed applications. An understanding of the differences in circuit topology along with basic noise and distortion characteristics is crucial for optimal product selection.
2006-01-18 Variable gain amplifier takes aim at wireless infrastructure
ADI announced an analog-control variable-gain amplifier that is optimized for linearity in wireless infrastructure applications, such as cellular base station radio transceivers.
2008-02-20 Variable gain amplifier supports multichannel data access
ADI has introduced a general-purpose two-channel, digitally controlled variable gain amplifier developed with specific features for today's cable modem termination system.
2013-07-04 Utilise BGA3018 as reverse amplifier
Here are the schematic and layout requirements for using the BGA3018 as a CATV reverse amplifier.
2001-06-11 Using Xicor digitally controlled potentiometers in commercial RF power amplifier applications
This application note describes how to implement Xicor's digitally controlled potentiometers in commercial RF power amplifier applications.
2010-09-02 Using the TPS23753A (and family) with an external error amplifier
This application note shows how to use the common TLV431 as an error amplifier in conjunction with the family of parts in a non-isolated flyback converter application.
2010-06-23 Using the MCP4728 12bit DAC for LDMOS amplifier bias control applications
The DAC is favourably used in the bias control circuit for the base station power amplifier module. In practical applications, the bias control circuit maintains the IDQ within a 4 percent range. This application note shows an example of how the DAC converter is used for this purpose.
2001-09-20 Using the EPA060B-70 as a low-noise, high-dynamic-range 2GHz amplifier
This application note outlines the behavior and circuit layout of the Excelics EPA060B-70 medium-power, low-noise heterojunction FET.
2001-09-20 Using the EFA240D-89 as a high-intercept 2GHz linear power amplifier
This application note outlines the behavior and circuit layout of the Excelics EFA240D-89 high-power MESFET.
2010-08-24 Using digital potentiometers for programmable amplifier gain
This application note discusses implementations of programmable gain circuits using an op amp and a digital potentiometer.
2010-08-23 USB amplifier delivers loudspeaker audio fidelity
NXT has launched its audio amplifier module that transforms USB-powered audio power and quality to loudspeaker audio fidelity.
2002-05-20 UltraRF, Hitachi Kokusai codevelop amplifier modules
UltraRF Inc. and Hitachi Kokusai Electric of Japan have agreed to jointly develop RF power amplifier modules based on UltraRF's LDMOS-8 technology.
2002-12-20 Ultra low noise amplifier for 900 and 2000 MHz with high IP3
This application note describes four LNA designs with the BFG410W and BFG425W transistors
2001-04-03 Two-tone linearity in a 900MHz silicon bipolar class AB amplifier
This application note shows the typical behavior of a 900MHz amplifier operating in the class AB mode, and describes a method to create suppression of the intermodulation products to better than -30dBc over a 40dB dynamic range (1mW to 10W peak envelope power).
2001-04-03 Two-stage wideband HF linear amplifier for 400W PEP using BLW96 and BLW50F
This application note presents a wideband power amplifier design that provides up to 400W peak envelope power (PEP) using two BLW96 transistors. It also describes a suitable drive amplifier using two BLW50F transistors in class A operation.
2002-12-03 Tuned amplifier application for the SL6140
This article describes tuned amplifier application for the sl6140.
2009-06-02 TS971 based electret condenser microphone amplifier
This application note explains how to implement the TS971 as a microphone pre-amplifier for an electret condenser microphone (ECM). This type of microphone has one of the best prices to performance ratio on the market.
2009-10-28 TS4990 low voltage audio power amplifier evaluation board user guidelines
The DEMO TS4990 is an evaluation board designed for the TS4990 low power audio amplifier.
2004-12-08 TS4984 low voltage audio power stereo amplifier evaluation board user guide
This app note describes the DEMO TS4984Q evaluation board designed for the TS4984 low power audio stereo amplifier.
2012-05-03 TriQuint rolls digital variable gain amplifier
The TQM879008 features variable gain from 10-41.5dB at 2.5GHz, 48.5dBm output IP3 and 27.3dBm P1dB.
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