A power control method and device for mobile terminal power amplifier
A technology of power amplifier and power control, which is applied to power amplifiers, improved amplifiers to increase efficiency, and improved amplifiers to reduce noise effects. It can solve problems such as switching spectrum and harmonic deterioration, reduce operating current, and improve transient switching. Spectral characteristics, the effect of reducing system noise
Active Publication Date: 2018-11-27
BEIJING VANCHIP TESTING TECH CO LTD
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Problems solved by technology
Although this scheme improves the power-added efficiency at low power, but at high power, especially at high power and low supply voltage, this scheme is prone to deterioration of switching spectrum and harmonics
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[0036] The technical content of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0037] In order to achieve the purpose of optimizing the power-added efficiency of the power amplifier under the conditions of multiple power levels and a large power supply voltage range, the present invention provides a power control method for a power amplifier of a mobile terminal, comprising the following steps:
[0038] 1. Read the power supply voltage signal and power control signal, and generate an amplified signal that is linearly related to the above power control signal;
[0039] 2. According to the above amplified signal and saturation information, generate one or more controlled currents, combine these controlled currents, and convert them into voltages;
[0040] 3. Linearly stabilize the converted voltage to generate the base control voltage of the power amplifier.
[0041]In order to realize the above me...
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The invention discloses a power control method for a mobile terminal power amplifier. The method comprises the following steps of 1, reading power source voltage signals and power control signals, and generating amplifying signals which have linear relationship with the power control signals; 2, according to the amplifying signals and saturability information, generating one or more controlled currents, combining the controlled currents, and converting the combined total current into voltage; 3, conducting linear voltage stabilization on the converted voltage, and generating the base control voltage of the power amplifier. According to the power control method for the mobile terminal power amplifier, the base voltage of the power amplifier is changed by dynamically monitoring the saturability of a through component, so that the power added efficiency of the power amplifier under the multi-power level and wide supply voltage range is improved, and the spectrum characteristics of a radio frequency switch are improved.
Description
technical field [0001] The present invention relates to a power control method, in particular to a power control method for mobile terminal power amplifiers, and also to a power control device for realizing the above power control method, which belongs to the technical field of radio frequency circuits. Background technique [0002] Radio frequency power amplifiers (RF PAs) are widely used in wireless communication devices such as mobile phones. In the pre-stage circuit of the transmitter, the power of the RF signal generated by the modulating oscillator circuit is very small, and it needs to go through a series of amplifications of the RF power amplifier—buffer stage, intermediate amplification stage, and final power amplification stage to obtain sufficient RF power. Later, it can be fed to the antenna to radiate out. In this process, precise power control is crucial to ensure the normal use of wireless communication devices. [0003] Currently, there are various mobile c...
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IPC IPC(8): H03F1/02H03F1/26H03F3/20
Inventor 刘希达
Owner BEIJING VANCHIP TESTING TECH CO LTD