Power envelope tracing power supply of multi-phase interleaving radio-frequency power amplifier
A multi-phase interleaving, RF power technology, used in power amplifiers, high-frequency amplifiers, etc., can solve the problem of low operating efficiency of RF power amplifiers, and achieve the effect of reducing requirements, maintaining high linearity, and improving efficiency
Inactive Publication Date: 2013-01-23
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology
[0003] The technical problem solved by the present invention is: to construct a multi-phase interleaved parallel radio frequency power amplifier power envelope tracking power supply, to overcome the technical problem of low operating efficiency of radio frequency power amplifiers in the prior art
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[0019] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.
[0020] Such as figure 1 As shown, the specific embodiment of the present invention is: build a kind of multi-phase interleaved parallel radio frequency power amplifier power envelope tracking power supply, including the envelope detection circuit that detects the radio frequency signal, the linear amplification circuit that amplifies the envelope signal, Controlling the linear amplifier circuit to supply the multi-phase interleaved parallel synchronous BUCK circuit of the radio frequency power amplifier current, driving and controlling the switching conversion control circuit of the interleaved parallel synchronous BUCK circuit according to the current output by the linear amplifier circuit, the envelope detection circuit The input radio frequency signal is detected and then input to the linear amplifier circuit for linear amplification, and the s...
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The invention relates to a power envelope tracing power supply of a multi-phase interleaving radio-frequency power amplifier, which comprises an envelope detection circuit for detecting a radio-frequency signal, a linear amplification circuit for amplifying an envelope signal, a multi-phase interleaving synchronous BUCK circuit for controlling a current which is supplied by the linear amplification circuit to the radio-frequency power amplifier, and a switch conversion control circuit for driving and controlling the interleaving synchronous BUCK circuit according to the current outputted by the linear amplification circuit, wherein the envelope detection circuit inputs an inputted radio-frequency signal to the linear amplification circuit to be linear amplified after detecting the radio-frequency signal, the switch conversion control circuit produces a multi-phase drive pulse to control the multi-phase interleaving synchronous BUCK circuit according to the current outputted by the linear amplification circuit, so the current which is supplied by the linear amplification circuit to the radio-frequency power amplifier is minimized.
Description
technical field [0001] The invention relates to a radio frequency power amplifier power supply, in particular to a multi-phase interleaved parallel radio frequency power amplifier power envelope tracking power supply. Background technique [0002] High linearity and high efficiency RF power amplifier (Radio Frequency Power Amplifier, referred to as "RFPA") is not only the fourth generation mobile communication system (4G) and high-definition television (High Definition Television, referred to as Orthogonal Frequency Division Modulation (orthogonal frequency division multiplexing, referred to as "OFDM") used in the "HDTV") system represented by Multi-Carrier Modulation (Multi-Carrier Modulation, referred to as "OFDM") "MCM") is one of the key basic devices, and it is also the goal that the RF power amplification technology at home and abroad has been striving for in the past 20 years. MCM requires a higher carrier frequency and a wider frequency band, and it also require...
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IPC IPC(8): H03F3/20H03F3/189
Inventor 和军平王健
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL