A multi-mode radio frequency front-end circuit and its control method

A radio frequency front-end, multi-mode technology, applied in the direction of electrical components, transmission systems, etc., to achieve the effect of simplifying complex design, improving efficiency, and improving linearity indicators

Active Publication Date: 2021-04-20
安徽矽磊电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Furthermore, when the power amplifier adopts a differential-single-ended structure and the low-noise amplifier adopts a single-ended-differential structure, it will also pose a huge challenge to the design of multi-mode power amplifiers and low noise amplifiers.

Method used

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  • A multi-mode radio frequency front-end circuit and its control method
  • A multi-mode radio frequency front-end circuit and its control method
  • A multi-mode radio frequency front-end circuit and its control method

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Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0035] Such as image 3 As shown, it shows the basic circuit structure of the radio frequency front-end circuit of the present invention, wherein the power amplifier PA is composed of three amplifying units: input stage STAGE 1, intermediate stage STAGE 2 and output stage STAGE3, and the PA is a fully differential structure . The input of the PA receives the differential signal from the upstream transmit circuit. The upstream transmitting circuit may include a baseband controller, a digital or analog frequency converter connected in sequence; a local oscillator signal gener...

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Abstract

The present invention proposes a multi-mode radio frequency front-end circuit, including a power amplifier and a low noise amplifier respectively coupled with the antenna; the power amplifier is composed of at least a first amplification stage and a second amplification stage; the output of the first amplification stage is passed through The first switch is coupled and connected to the output end of the low noise amplifier to form a first additional path; the output end of the low noise amplifier is also connected to its input end through a second switch to form a second additional path; the mode switching control circuit is used to control the first The on-off state of the switch and the second switch also controls the first amplifier stage, the second amplifier stage, and the low-noise amplifier to be in the working state or disabled state, so that the radio frequency front-end circuit is in the required working mode. Through the above circuit structure, the circuit design is simplified, so that the improved RF front-end circuit can have both the advantages of high efficiency in the low power output mode of the power amplifier and the low noise figure in the low gain mode of the low noise amplifier.

Description

technical field [0001] The invention relates to the field of communication signal processing, in particular to a multi-mode radio frequency front-end circuit and a control method thereof. Background technique [0002] figure 1 It shows a typical circuit diagram of a Wi-Fi communication product in the prior art. The entire radio frequency circuit is composed of five modules, including a wireless transceiver module, a transmitting front-end module, a transceiver switch module, a low-noise amplifier module and an antenna module, such as As shown in the figure, the transmitter front-end module is inside the dotted line box. A wireless transceiver (Radio Transceiver) is generally one of the core devices of a design. In addition to being closely related to the radio frequency circuit, it is generally related to the CPU. Here, we only focus on some content related to the radio frequency circuit. When sending a signal, the transceiver itself will directly output a weak radio frequ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40H04B1/44H04B1/04
CPCH04B1/04H04B1/40H04B1/44H04B2001/0408
Inventor 王晗
Owner 安徽矽磊电子科技有限公司
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