Charge pump output voltage control circuit and method

A technology of output voltage control and charge pump, which is applied in the electronic field and can solve the problems of low boosting efficiency of the charge pump

Pending Publication Date: 2022-04-26
上海歌尔微电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a charge pump output voltage control circuit and method, aiming to solve the technical problem of low boosting efficiency of the charge pump

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  • Charge pump output voltage control circuit and method
  • Charge pump output voltage control circuit and method
  • Charge pump output voltage control circuit and method

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, the ...

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Abstract

The invention discloses a charge pump output voltage control circuit and method, the circuit comprises a clock frequency adjusting module, an oscillator and a charge pump, the clock frequency adjusting module is connected with the oscillator, and the oscillator is connected with the charge pump; the clock frequency adjusting module is used for outputting a corresponding frequency adjusting signal to the oscillator according to the working state of the charge pump; the oscillator is used for adjusting the frequency of the clock signal according to the frequency adjusting signal and outputting the clock signal after frequency adjustment to the charge pump; the charge pump is used for outputting a bias voltage according to a received clock signal and an input voltage. The clock frequency adjusting module outputs the frequency adjusting signal according to the working state of the charge pump, the oscillator adjusts the frequency of the clock signal according to the frequency adjusting signal and then sends the frequency to the charge pump, the charge pump outputs the bias voltage according to the clock signal, and the frequency of the clock signal can be adjusted according to the working state of the charge pump; therefore, the boost time of the charge pump is shortened, and the boost efficiency of the charge pump is improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a charge pump output voltage control circuit and method. Background technique [0002] At present, when the sensor microphone is working, a stable and low-noise bias voltage is required to convert the mechanical deformation generated by the sound pressure on the sensor microphone diaphragm into an electrical signal of a certain amplitude. Generally, a charge pump is used to generate a DC current. Ping provides bias for the sensor microphone, and the existing control circuit controls the boosting time of the charge pump for too long, resulting in low boosting efficiency of the charge pump. Therefore, how to improve the boosting efficiency of the charge pump has become an urgent technical problem to be solved. [0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not mean that the above content is admitted a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07
CPCH02M3/07
Inventor 刘洋齐鲁欣王艳梅
Owner 上海歌尔微电子有限公司
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