Power supply modulator and power supply modulating method

Abstract

The invention discloses a power supply modulator and a power supply modulating method, comprising isolating power supplies, amplitude generating circuits and a controller, wherein the number of the isolating power supplies and the amplitude generating circuits are respectively N (N is more than 1); each isolating power supply is connected with one corresponding amplitude generating circuit; the output ends of all the amplitude generating circuits are connected in series; the controller is respectively connected with the amplitude generating circuits, wherein the isolating power supplies output reference power supplying signals to the amplitude generating circuits; the controller receives the reference signals to be tracked, determines the amplitudes of electric signals output by all the amplitude generating circuits according to the amplitudes of the reference signals to be tracked, and sends control signals to all the amplitude generating circuits; and after receiving the control signals, the amplitude generating circuits adopt the reference power supplying signals to output the electric signals according to the control signals; and all the amplitude generating circuits output in series. The invention can realize the higher tracking accuracy of output signals by less input power supplies, and can simultaneously optimize the loss of devices.

Description

technical field [0001] The invention relates to power supply technology, in particular to a power supply modulator and a power supply modulation method. Background technique [0002] In electronic devices, there are many occasions that require voltage modulation, and one of the more typical ones is a power supply device for radio frequency power amplifiers. In order to cope with the continuous improvement of users' demand for communication bandwidth, the modulation methods of communication systems have become more and more complex. A prominent problem brought about by this is the low efficiency of RF power amplifiers, which has become a bottleneck for improving the efficiency of the entire communication system. [0003] For linear power amplifiers, in order to ensure linearity, in the traditional DC power supply mode, the power supply voltage needs to be higher than the peak voltage of the RF signal. When the RF signal amplitude is low, the power amplifier is subjected to h...

AI Technical Summary

Problems solved by technology

But the number of stages of its output voltage is the same as the number of input voltage sources, so the tracking accuracy is low

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