Attenuation control voltage determining method, attenuation control voltage determining device and ALC (automatic level control) circuit

A technology of attenuation control and determination method, which is applied in the field of radio frequency, and can solve the problem of poor control effect of output signal power

Active Publication Date: 2014-01-29
COMBA TELECOM SYST CHINA LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Embodiments of the present invention provide a method and device for determining an attenuation control voltage, and an ALC circuit...

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  • Attenuation control voltage determining method, attenuation control voltage determining device and ALC (automatic level control) circuit
  • Attenuation control voltage determining method, attenuation control voltage determining device and ALC (automatic level control) circuit
  • Attenuation control voltage determining method, attenuation control voltage determining device and ALC (automatic level control) circuit

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Embodiment Construction

[0038] In order to provide an implementation plan for improving the power control effect of the ALC circuit on the output signal of the power amplifying device, the embodiment of the present invention provides a method, device and ALC circuit for determining the attenuation control voltage. The following describes the preferred implementation of the present invention in conjunction with the accompanying drawings It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0039] An embodiment of the present invention provides a method for determining an attenuation control voltage, such as figure 2 shown, including:

[0040] Step 201 , when the sampling period arrives, sample the voltage signal output by the ...

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Abstract

The invention discloses an attenuation control voltage determining method, an attenuation control voltage determining device and an ALC (automatic level control) circuit. The method includes when a sampling period reaches, sampling voltage signals output by a detecting circuit in the ALC circuit to acquire sampling voltage of a current sampling period; on the basis of the sampling voltage of the current sampling period and power voltage of a previous sampling period, determining power voltage of the current sampling period; according to a preset comparison table of the power voltage and attenuation control voltage, and determining the attenuation control voltage corresponding to the power voltage of the current sampling period to serve as the attenuation control voltage of the current sampling period to be used for controlling attenuation parameters of a radio frequency attenuation circuit in the ALC circuit before the attenuation control voltage of a next sampling period is determined. By the method, the device and the ALC circuit, power control effect, on output signals of power amplification equipment, of the ALC circuit is improved.

Description

technical field [0001] The present invention relates to the field of radio frequency technology in the field of communication technology, in particular to a method, device and ALC circuit for determining an attenuation control voltage applicable to time slot signal communication equipment. Background technique [0002] In a wireless communication system, a power amplifier is usually used to amplify the power of the signal in transmission, so as to ensure sufficient power strength of the signal and expand the coverage of the signal. When the power amplifier performs power amplification on the received signal, when the output power of the power amplifier exceeds the rated output power, it will cause severe signal distortion, affect the communication quality, and even damage the equipment. To solve this problem, a control and protection circuit capable of limiting the maximum output power of the power amplifier is generally added to the power amplifier device, and this circuit ...

Claims

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Application Information

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IPC IPC(8): H03G3/30
CPCY02B60/50
Inventor 李洋洋黄健安刘海涛李钢杨桂杰
Owner COMBA TELECOM SYST CHINA LTD
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