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In recent years, there has been a great effort to increase the efficiency of Radio Frequency Power Amplifiers. This can be achieved by using techniques such as Envelope Tracking and Envelope Elimination and Restoration. These techniques require DC/DC converters capable of changing its output voltage very fast, in order to reproduce the envelope of the signal being amplified by the Radio Frequency...
Envelope Tracking techniques are used to increase the efficiency of modern radiofrequency transmitters. These techniques are based on varying the supply voltage of the radiofrequency power amplifier according to the envelope of the signal to be transmitted. This paper presents an Envelope Tracking system based on a multilevel topology that targets relatively low voltage systems (12-28 volt range)...
Wireless communication transmitters have very low efficiencies due to the use of linear radiofrequency power amplifiers. Several techniques have been proposed over the years to improve the efficiency of these systems. One of the most promising is called the envelope tracking technique, which is based on using a fast switching mode power supply to provide a varying voltage to the power amplifier that...
Envelope Tracking techniques are used to increase the efficiency of modern radiofrequency transmitters. These techniques are based on varying the supply voltage of the amplifiers according to the envelope of the signal being transmitted, thus maximizing their efficiency. Converters suitable for Envelope Tracking applications must provide high tracking bandwidths, along with low output voltage ripple...
The envelope tracking technique is used to increment the efficiency of modern radiofrequency transmitters. It is based on supplying the linear radiofrequency power amplifier of the transmitter with a time-varying voltage that tracks the envelope of the information signal being transmitted. These systems require a converter capable of varying its output voltage very fast and a control system able to...
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