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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
2002-07-04 Sirenza wins patent for transimpedance amplifiers
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2005-06-13 Sirenza amplifiers target apps that need high gain and IP3
Sirenza has developed a family of 5V InGaP supply solutions in the SOT89 and SOT86 packages that can provide similar performance to its SBA 8V designs, but with improved operating robustness and RF efficiency
2002-02-19 Signal limiter for power amplifiers
This application note describes how power circuits are designed to effectively maintain a high level of sonic integrity for cost-effective performance.
2002-12-06 Signal limiter for power amplifiers
This application note presents a design of a signal limiter for power amplifiers, using the THAT 4301 Analog Engine.
2003-02-21 SiGe rolls out 10/12.5Gbps amplifiers
SiGe Semiconductor has added the SE1052W TIA and the SE1250L limiting amplifier to its LightCharger series of optical interface components.
2007-02-27 SiGe HBT amplifiers roll for two-way radios
California Eastern Laboratories has announced the availability of a medium-power SiGe HBT transistor amplifier from NEC.
2014-11-17 Self-heating limits noise in microwave amplifiers
Chalmers University of Technology scientists showed how noise in a microwave amplifier is limited by self-heating at very low temperatures, which can be useful in quantum computers and radio astronomy.
2000-03-20 Selecting operational amplifiers for new high-volume applications
This paper covers the general physics describing operational amplifiers for high volume applications. The paper also shows what to look for when choosing op amps for portable applications?covers key specifications, testing techniques, and trim techniques.
2002-10-09 Sanyo CDMA handset adopts RF Micro amplifiers
RF Micro Devices Inc. has begun shipping two power amplifiers and a triple-band LNA/mixer to Sanyo Corp., to be deployed on the latter's latest SCP-4900 CDMA 2000 1X handset.
2007-04-04 RFMD claims 'smallest' EDGE power amplifiers
RFMD's quad-band EDGE power amplifier combines high integration with a 6-by-6mm package, resulting in the smallest EDGE power amplifier solution in its class.
2005-02-03 RF power amplifiers target wireless applications up to 3GHz
ParkerVision announced that it is introducing two new families of RF power amplifier products.
2013-05-30 RF control circuit optimises Airfast Doherty amplifiers
The new MMDS20254H advanced Doherty alignment module (ADAM) enables more accurate alignment of phase and amplitude on the carrier and peaking paths of high-power Doherty amplifiers.
2004-11-10 RES L-Band amplifiers use 'state-of-the art LDMOS technology'
Richardson Electronics announced the availability of two new L-Band power amplifiers designed and manufactured by RF Engineered Solutions Ltd.
2009-04-27 Protect current-sense amplifiers against overvoltage transients
This application note describes methods of protecting lower-voltage current sense amplifiers from high-voltage spikes and transients. Such conditions are frequently encountered in automotive car battery operation, and are referred to as load-dump conditions.
2009-07-16 Precision instrumentation amplifiers with rejustors solve high-gain apps
Learn how to use a zero-drift, precision, instrumentation amp with a pair of rejustors and gain-setting resistors to ensure high accuracy.
2002-09-18 PPL delivers 40Gbps amplifiers, driver
The Model 5885 modulator driver is intended to drive LiNbO3 modulators at data rates of up to 43Gbps and requires 400mV of input signal to produce wide-open eye patterns with 7.7V amplitude.
2008-08-15 Power amplifiers work in 18-33GHz frequency bands
Avago Technologies has introduced highly efficient, linear power amplifiers for the 18-33GHz frequency range.
2006-05-23 Power amplifiers target WiMAX, Wi-Fi apps
Sirenza Microdevices announced the production release of a new family of linear power amplifiers for WiMAX (802.16 d/e) and Wi-Fi (802.11 a/b/g) applications.
2009-01-23 Power amplifiers on the hot seat
A virtual "sit down" with some leaders in the industry discussed where power amplifier technology is, and where they think it is going.
2005-03-29 Power amplifiers mix higher power, lower distortion
austriamicrosystems' new family of 1.6W single-channel audio power amplifiers promise to offer portable electronics designers higher output power and lower distortion solutions
2010-10-21 Power amplifiers for mobiles boast digital power mode control
Avago Technologies' new CoolPAM power amplifier modules designed for linear quad-band GSM/EDGE operation
2007-12-21 Post amplifiers feature twice the signal gain
Micrel Inc. has beefed up its lineup of post amplifiers with the addition of two devices.
2002-05-10 OPHIR provides LAN connectivity to amplifiers
OPHIR RF Inc. has announced its Ethernet Interface option for its amplifier products, providing LAN connectivity via Cat. 5 10Base-T wiring.
2010-07-29 Operational amplifiers offer lower power consumption
Eyeing power demands in consumer, industrial, automotive and medical applications, Microchip's new MCP6401/2/4/ operational amplifiers (op amps) offer lower power consumption and smaller packages.
2005-01-18 O2Micro receives multistage amplifiers patent
O2Micro Int. Ltd, a supplier of power management and security ICs, has received 16 claims under United States patent number 6,812,796 for its inter-stage coupling technology in multistage amplifiers.
2005-06-13 Notebook computer upgrade path for audio power amplifiers
This app note discusses audio power amplifiers in notebook computers.
2013-06-17 Northrop Grumman rolls GaAs MMIC power amplifiers
The APH667 and the APH668 are GaAs-based broadband, three-stage amplifier devices that operate from 81 to 86GHz and 71 to 76GHz, respectively.
1999-06-01 Noise, slew rate, and unity gain stability tradeoffs in high-speed amplifiers
This paper examines the tradeoffs that are made between noise, bandwidth, and slew rate during the design of high-speed bipolar operational amplifiers.
2003-05-27 Noise figure measurements on amplifiers in pulsed mode
This application note presents a method for determining the noise figure of amplifiers with pulsed power supply: using a spectrum analyzer (FSP or FSE or FSIQ or ESI), noise measurement software FS-K3 and a function or pulse generator.
1999-12-14 Noise analysis of FET transimpedance amplifiers
The availability of detailed noise spectral density characteristics for the OPA111 amplifier allows an accurate noise error analysis in a variety of different circuit configurations. The fact that the spectral characteristics are guaranteed maximums that allow absolute noise errors to be truly bounded. Other FET amplifiers normally use simpler specifications of rms noise in a given bandwidth (typically 10Hz to 10kHz) and peak-to-peak noise (typically specified in the band 0.1Hz to 10Hz). These specifications do not contain enough information to allow accurate analysis of noise behavior in any but the simplest of circuit configurations. This application note discusses in detail how the OPA111 is utilized to perform noise error analysis in different circuit configurations.
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