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Radio frequency front-end control circuit, control method thereof, radio frequency front-end control chip, system, storage medium and terminal

A radio frequency front-end and control circuit technology, applied in the computer field, can solve the problems of large signal frequency components and energy, limited EMI improvement effect, etc., and achieve the effects of small signal frequency components and energy, slowing changes, and reducing EMI.

Active Publication Date: 2020-04-17
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the slew rate can be significantly changed by controlling the driving capability, the frequency components and energy of the signal are still relatively large when the signal starts to change, and the improvement effect on EMI is limited

Method used

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  • Radio frequency front-end control circuit, control method thereof, radio frequency front-end control chip, system, storage medium and terminal
  • Radio frequency front-end control circuit, control method thereof, radio frequency front-end control chip, system, storage medium and terminal
  • Radio frequency front-end control circuit, control method thereof, radio frequency front-end control chip, system, storage medium and terminal

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Embodiment Construction

[0023] As mentioned in the background art, although the slew rate can be significantly changed by controlling the driving capability, when the signal starts to change, the frequency component and energy of the signal are still relatively large, and the improvement effect on EMI is limited.

[0024] Such as figure 1 As shown, the adjusted driving signal variation curve in the prior art is as follows figure 1 shown. Among them, at the position shown in number 11, that is, the position where the driving signal changes from high level to low level, the signal changes quickly, the slope of the driving signal is relatively large, and the frequency components of the signal after Fourier decomposition are relatively small. More, the energy is higher, and it will still generate EMI to the signal received by the RF device.

[0025] The technical solution of the present invention sets the delay element so that the drive control signal is input to the control terminal of the drive devic...

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Abstract

The invention discloses a radio frequency front-end control circuit, a control method thereof, a radio frequency front-end control chip, a system, a storage medium and a terminal. The radio frequencyfront-end control circuit comprises a plurality of driving devices connected in parallel and used for accessing a driving control signal, wherein the output ends of the driving devices output radio frequency control signals, and the radio frequency control signals are used for controlling a radio frequency front end; and a plurality of delay elements which are respectively coupled with the controlend of each driving device, wherein a driving control signal is input to the control end of each driving device through the delay element coupled with the driving device, and the delay time lengths of the delay elements coupled with the control ends of the plurality of driving devices are sequentially increased. According to the technical scheme of the invention, the EMI of the RF device can be reduced more effectively.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a radio frequency front-end control circuit and a control method thereof, a radio frequency front-end control chip, a system, a storage medium, and a terminal. Background technique [0002] The development of communication products to the fifth generation mobile communication technology (5th generation mobile networks, 5th-Generation, 5G) needs to be compatible with different modes and different frequency bands, and the radio frequency (Radio Frequency, RF) front end is complex. And due to the complex and flexible configuration of 5G, the RF front-end must also be switched quickly. Therefore, there will be multiple RF front-end (RFFE) control (ctl) interfaces in the system, and the speed should be increased to 52M or even faster. [0003] The RFFE control signal is a digital signal closest to the RF device, and since the signal received by the RF device is usually a small sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B1/401H04B1/525
CPCH04B1/40H04B1/401H04B1/525
Inventor 孟宪余杨耕许红菊
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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