Voltage adjustment circuit of amplification circuit and related adjustment method

A technology of voltage adjustment circuit and amplifying circuit, which is applied in the direction of amplification control, improving amplifier to improve efficiency, electrical components, etc., which can solve the problems of output signal distortion and poor energy use efficiency, so as to improve energy use efficiency and avoid distortion Effect

Inactive Publication Date: 2014-08-06
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the impedance value of the load of the amplifying circuit changes, or when the power signal i

Method used

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  • Voltage adjustment circuit of amplification circuit and related adjustment method
  • Voltage adjustment circuit of amplification circuit and related adjustment method
  • Voltage adjustment circuit of amplification circuit and related adjustment method

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Embodiment Construction

[0018] Embodiments of the present invention will be described below in conjunction with related drawings. In the drawings, the same reference numerals indicate the same or similar elements or process steps.

[0019] The following will take the audio signal output device 100 as an example to illustrate how to apply the concept of the present invention to the amplifier circuit 120 of the audio signal output device 100 to improve the energy efficiency of the audio signal output device 100 .

[0020] figure 1 It is a simplified functional block diagram of an audio signal output device 100 according to an embodiment of the present invention. The audio signal output device 100 includes an amplifier circuit 120 and a voltage adjustment circuit 140 , and can provide an output signal Vout to a load 190 through an impedance circuit 180 . In order to make the drawing concise and easy to explain, other components and connections of the audio signal output device 100 are not shown in the ...

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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...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03G3/00
Inventor 萧鸣均张腾轰孙绍茗
Owner RICHTEK TECH
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