Voltage adjustment circuit of amplification circuit and related adjustment method

Abstract

The invention discloses the voltage adjustment circuit of an amplification circuit and a related adjustment method. The voltage adjustment circuit provided by the embodiment of the invention comprises a reference voltage generation circuit, a subtractor circuit, a threshold generation circuit and a comparison circuit, and is used for providing a power source signal for the amplification circuit to guarantee that the amplification circuit can provide an output signal for a load according to an input signal, wherein the subtractor circuit is used for generating a difference signal according to the output signal and the power source signal; the comparison circuit is used for setting the signal value of the power source adjustment signal of the reference voltage generation circuit according to the difference signal and a threshold signal generated by the threshold generation circuit; the voltage adjustment circuit can be used for adjusting a power source signal output to the amplification circuit according to the characteristics of the output signal. Therefore, the energy utilization efficiency of the amplification circuit can be improved and the distortion of the output signal can be avoided.

Description

technical field [0001] The invention relates to an amplifying circuit, in particular to a voltage adjusting circuit of an amplifying circuit and a related adjusting method. Background technique [0002] Due to the increasing scarcity of energy, the energy efficiency of electronic products is becoming more and more important. Especially for portable electronic products such as smart phones or tablet computers, the usage time is usually one of the most important parts for users. If the energy efficiency of electronic products can be improved, their use time can also be effectively extended. There are many ways to improve the energy efficiency of electronic products, for example, starting from the common amplifier circuit in various electronic products. [0003] The amplifying circuit is usually coupled to two fixed potentials (for example, the potentials of the power supply terminal and the ground terminal) to receive the power signal, so as to generate an amplified output s...

AI Technical Summary

Problems solved by technology

However, when the impedance value of the load of the amplifying circuit changes, or when the power signal is not accurate enough, it is still easy to cause distortion of the output signal or poor energy efficiency.

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