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Push-pull power amplification circuit

A power amplifier circuit and power amplifier technology, applied in the field of radio frequency, can solve the problem of low power added efficiency of push-pull power amplifier

Pending Publication Date: 2022-06-24
RADROCK (SHENZHEN) TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An embodiment of the present invention provides a push-pull power amplifier circuit to solve the problem that the power added efficiency of the existing push-pull power amplifier is too low

Method used

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Embodiment Construction

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be understood that the present invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like ...

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PUM

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Abstract

The invention discloses a push-pull power amplification circuit which comprises a first power amplifier, a second power amplifier, an impedance adjustable unit and a first change-over switch. The first input end of the impedance adjustable unit is connected with the output end of the first power amplifier, and the second input end of the impedance adjustable unit is connected with the output end of the second power amplifier; the first end of the first change-over switch is connected with the input end of the first power amplifier, and the second end of the first change-over switch is grounded; when the push-pull power amplification circuit works in a high-power mode, the first change-over switch is switched off, the impedance adjustable unit forms a first impedance value, when the push-pull power amplification circuit works in a low-power mode, the first change-over switch is switched on, the impedance adjustable unit forms a second impedance value, and the first impedance value is smaller than the second impedance value. According to the technical scheme, the power additional efficiency and the gain flatness of the push-pull power amplification circuit in different power modes can be improved.

Description

technical field [0001] The present invention relates to the field of radio frequency technology, in particular to a push-pull power amplifier circuit. Background technique [0002] At present, push-pull power amplifiers are widely used in RF front-ends because they can meet the requirements of higher frequencies and higher-order QAM modulations. [0003] However, when the existing push-pull power amplifier has a large bandwidth, due to the limitation of the circuit structure, when the push-pull power amplifier performs power mode switching, the power added efficiency (PAE) of the push-pull power amplifier circuit will be too low. , thereby affecting the overall performance of the push-pull power amplifier circuit. SUMMARY OF THE INVENTION [0004] Embodiments of the present invention provide a push-pull power amplifier circuit to solve the problem that the power added efficiency of the existing push-pull power amplifier is too low. [0005] A push-pull power amplifier ci...

Claims

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Application Information

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IPC IPC(8): H03F1/56H03F3/195H03F3/213H03F3/26
CPCH03F1/565H03F3/195H03F3/213H03F3/26H03F2200/451
Inventor 赖晓蕾陈炉星李铖方建饶雪琴倪建兴
Owner RADROCK (SHENZHEN) TECH CO LTD