Field programmable gate array (FPGA) based automatic power control circuit and method

Abstract

The invention discloses a field programmable gate array (FPGA) based automatic power control circuit and method. The loop-locked power control circuit comprises a power amplification circuit, a coupling circuit, a detector circuit, an ARM circuit and an FPGA circuit. An output radio frequency signal of the power amplification circuit is coupled by the coupling circuit and then is output to the detector circuit, and the detector circuit samples the radio frequency signal and outputs an obtained sampling signal to the ARM circuit; and the ARM circuit compares a power level obtained through conversion of the sampling signal with an original power level, calculates to obtain an adjustment signal of the FPGA circuit and gives the adjustment signal to the PFGA circuit, and controls the PFGA circuit to output a required radio frequency signal to the input end of the power amplification circuit. According to the FPGA based automatic power control circuit and method, an electronic speed control attenuation circuit is saved, and data collected by the ARM is directly fed back to the FPGA circuit, thereby controlling the output power, improving control accuracy and speed, simplifying circuit design and increasing initial control depth of an adaptive logic circuit (ALC).

Description

technical field [0001] The invention relates to the technical field of output power control of mobile communication equipment, in particular to a circuit and method for realizing automatic power control by means of ARM collecting data feedback. Background technique [0002] Automatic Level Control (ALC for short) is a common method for automatically and precisely controlling signal amplitude, and is widely used in communication transmitters, signal sources and various measuring instruments. Especially in the composition of the signal source, ALC has become a crucial part, directly related to power flatness, power stability, power accuracy and output power dynamic range and other indicators. It can be said that the performance of ALC will directly affect the power characteristics of the signal source output signal. [0003] The principle of automatic level control ALC is: when the communication equipment works at the maximum gain and the output is the maximum power, when the...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect of prior art, provide a kind of automatic power control circuit and method based on FPGA, the data collected by ARM is fed back to FPGA circuit to control the output power size, to solve the problem that the depth of ALC control is limited by power The problem of the attenuation range of the attenuation circuit

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