Conduction control method and device for peak value amplifier, and Doherty power amplifier

Abstract

The invention discloses a conduction control method and device for a peak value amplifier, and a Doherty power amplifier, wherein the conduction control device comprises a radio-frequency switch circuit in the peak value amplification branch circuit of the Doherty power amplifier; and the radio-frequency switch circuit is used for controlling the conduction and shutdown of the peak value amplifier in the peak value amplification branch circuit. The invention has the advantages of avoiding the defect of conducting the peak value branch circuit in the Doherty power amplification in advance, reducing the power consumption of the peak value power amplifier and improving the batch efficiency of the whole power amplifier; and furthermore, compared with the scheme that the conduction time of the peak value power amplifier is improved by the complex digital circuit, the product cost and production cost of the power amplifier are reduced greatly.

Description

technical field [0001] The present invention relates to the technical field of base station power amplifiers, in particular to a conduction control method and device for a peak amplifier and a multi-combination power amplifier. Background technique [0002] With the continuous popularization of green environmental protection and low-carbon economic concepts in the world, operators have higher and higher requirements for the reduction of power consumption of wireless communication systems. In a wireless communication system, the radio frequency power amplifier (power amplifier for short) in the base station equipment is one of the core modules of the whole system, and the important index of the radio frequency power amplifier is the power amplifier efficiency. Data analysis shows that in the entire base station equipment, the energy consumption of the power amplifier accounts for about 60% of the total energy consumption. Improving the efficiency of the power amplifier will r...

AI Technical Summary

Problems solved by technology

The traditional Doherty power amplifier has a disadvantage: theoretically, the power consumption of the peak power amplifier of the Doherty power amplifier is very small, but in the actual power amplifier, the power consumption of the peak power amplifier accounts for 10%-20%.

This is because the peak power amplifier in the Doherty power amplifier works in class C, and the peak amplifier is not turned on when the small signal is working. When the amplified signal gradually increases from small to a certain level, the carrier amplifier begins to compress. It can be turned on normally, otherwise it will affect the improvement of the linearity of the power amplifier by DPD

The turn-on of the class C amplifier is gradually turned on as the signal increases from small to large, so in practical applications, in order to fully turn on the peak amplifier when the carrier amplifier starts to compress, it must be advanced at a lower level. conduction, which increases the power consumption of the peak power amplifier, thereby reducing the efficiency of the entire power amplifier

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