High voltage envelope tracker for optimizing performance of radio frequency power amplifier
A technology of envelope tracker and radio frequency power, which is applied in the field of high voltage envelope tracker, can solve the problems of difficult design of power combiner for out-of-phase modulation signals, and the lack of wide application of out-of-phase modulation radio frequency power amplifiers, etc., to achieve optimization Effects of linearity, improved efficiency, and wide operating bandwidth
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[0036] figure 1 An envelope tracker proposed by the present invention is shown. The envelope tracker 101 receives a pair of differential envelope signal inputs V envp and V envn , while receiving a single-ended envelope signal V extracted from the differential envelope input AMP ; After being processed by the envelope tracker, one or several output signals are obtained as the power supply voltage of the radio frequency power amplifier. exist figure 1 Two power amplifiers 102 and 103 are shown in the figure as representatives, which are respectively a power amplifier for 3G / 4G standard and a power amplifier for 2G GSM standard. In practical applications, the number of radio frequency power amplifiers is not limited to two, but often more. The envelope tracker 101 mainly includes the following main functional modules:
[0037] 1. The boost module 104, its main function is based on the single-ended envelope signal V AMP The battery voltage V BAT ...
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