power amplifier


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power amplifier

[′pau̇·ər ¦am·plə‚fī·ər]
(electronics)
The final stage in multistage amplifiers, such as audio amplifiers and radio transmitters, designed to deliver maximum power to the load, rather than maximum voltage gain, for a given percent of distortion.

Power amplifier

The final stage in multistage amplifiers, such as audio amplifiers and radio transmitters, designed to deliver appreciable power to the load. Power amplifiers may be called upon to supply power ranging from a few watts in an audio amplifier to many thousands of watts in a radio transmitter. In audio amplifiers the load is usually the dynamic impedance presented to the amplifier by a loudspeaker, and the problem is to maximize the power delivered to the load over a wide range of frequencies. The power amplifier in a radio transmitter operates over a relatively narrow band of frequencies with the load essentially a constant impedance. See Amplifier

power amplifier

A unit in a transmitter that receives signals from a modulator and amplifies their power (in stages, if necessary) to a transmission level.
References in periodicals archive ?
Linearization and Efficiency Improvement of RF Power Amplifiers
RFMD expects to announce future advancements in GaN technology in 2007, including the availability of high power amplifiers (HPAs) featuring high linearity, wide bandwidth and power outputs up to 200 watts.
PulseWave RF(TM) is a fabless semiconductor company that has developed the industry's first digital high-efficiency RF power amplifier module for wireless infrastructure.
By creating the first technology to bring wireless power amplifiers into the digital age, PulseWave RF has demonstrated a 40 percent increase in power efficiency in base stations and will drive tremendous performance improvements and cost reduction, and we look forward to working with the company's talented team in bringing this technology to the markets and its customers.
Avago's CoolPAM power amplifiers provide the kind of extended "on" time that end users expect even as handsets begin to incorporate demanding functions such as TV viewing.
CoolPAM power amplifiers are already proven in handsets from leading manufacturers in Korea.
The Company is also the leading manufacturer of GaAs HBT, which offers distinct advantages over other technologies for the manufacture of current- and next-generation power amplifiers.
We are also the leader in WCDMA power amplifiers (PAs), and we expect WCDMA to be the world's fastest growing air interface standard.
His proven track record of helping organizations successfully roll out and build markets for new innovations will help us realize the enormous potential of our next-generation digital power amplifier technology.
Avago's MGA-412P8 power amplifier is perfect for portable WLAN applications such as PDAs and mobile handsets, digital cameras, printers and print servers.
PowerStar power amplifiers feature the industry's best selling implementation of power control technology.