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Radio frequency front-end control circuit and its control method, radio frequency front-end control chip, system, storage medium, 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: 2022-02-25
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Abstract
  • Description
  • 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 and its control method, radio frequency front-end control chip, system, storage medium, terminal
  • Radio frequency front-end control circuit and its control method, radio frequency front-end control chip, system, storage medium, terminal
  • Radio frequency front-end control circuit and its control method, radio frequency front-end control chip, system, storage medium, 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

A radio frequency front-end control circuit and its control method, a radio frequency front-end control chip, a system, a storage medium, and a terminal. The radio frequency front-end control circuit includes: a plurality of parallel-connected driving devices, which are used to access drive control signals, and whose output terminals output radio frequency control signals. signal, the radio frequency control signal is used to control the radio frequency front end; a plurality of delay elements are respectively coupled to the control terminal of each drive device, and the drive control signal is input through the delay element coupled to each drive device To the control terminal of the driving device, the delay time lengths of the delay elements coupled to the control terminals of the plurality of driving devices become larger in turn. The technical scheme of the invention can more effectively reduce the EMI to the RF device.

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 Patents(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