Publication

A 2.4-GHz low complexity polar transmitter using dynamic biasing for IEEE 802.15.6

Abstract

A 2.4 GHz polar transmitter compliant with the IEEE 802.15.6 standard is presented in this paper. A Linearized class-C power amplifier, employing dynamic biasing is used to minimize the adjacent channel interference and satisfy the defined spectrum mask requirements. An FBAR based frequency synthesizer enables fast startup and channel switching times. It is capable of addressing all the channels within the MBAN and ISM bands (2.36-2.48 GHz). The transmitter was integrated in 65 nm CMOS technology. It provides 0 dBm of output power while drawing 8.7 mA of current from a 1.2 V supply. The standalone power amplifier exhibits peak efficiency of 16%. © 2015 IEEE.

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An audio power amplifier (or power amp) is an electronic amplifier that amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones. Audio power amplifiers are found in all manner of sound systems including sound reinforcement, public address, home audio systems and musical instrument amplifiers like guitar amplifiers. It is the final electronic stage in a typical audio playback chain before the signal is sent to the loudspeakers.
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