Edge control circuit, driving method thereof and electronic equipment
A technology for controlling circuits and edges, applied in the field of electricity, can solve the problems of electromagnetic interference and harmonic distortion performance degradation, increase of PCB board area, increase of cost, etc., and achieve the effect of improving THD performance, improving efficiency, and reducing power loss
Active Publication Date: 2021-01-01
SHANGHAI AWINIC TECH CO LTD
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- Application Information
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Problems solved by technology
However, since the Class D audio power amplifier uses the pulse width modulation signal switching mode, it is easy to cause electromagnetic interference and harmonic distortion (THD) performance degradation, thereby affecting the sound quality
Generally, in order to suppress electromagnetic interference in electronic equipment, filters can be placed at the output of electronic equipment, however, this will lead to increased cost and increased PCB layout area
Method used
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[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application. In the case of no conflict, the following embodiments and technical features thereof can be combined with each other.
[0033] see figure 1 , is a schematic circuit block diagram of the edge control circuit 10 of the present application. As an optional application, the edge control circuit 10 can be applied to a class D audio power amplifier circuit. The edge control circuit 10 can receive a pulse width modulation signal PWM from an external pulse width modulation circuit (not shown), and output a load vo...
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The invention discloses an edge control circuit capable of outputting a load voltage according to a pulse width modulation signal, and the circuit comprises a power output circuit which is connected with an external load and is used for outputting the load voltage to the external load that can be discharged through the power output circuit; and a driving circuit which is used for controlling the power output circuit according to the pulse width modulation signal so that the load voltage can be gradually reduced or gradually increased when the external load is discharged through the power output circuit. The invention further discloses a driving method of the edge control circuit and electronic equipment. The edge control circuit, the driving method of the edge control circuit and the electronic equipment have high efficiency.
Description
technical field [0001] The present application relates to electricity, in particular to an edge control circuit, a driving method thereof, and an electronic device. Background technique [0002] The current consumer electronic equipment has a development trend of thinner and smaller, and at the same time requires more and stronger performance and functions, and the requirements for circuit integration in electronic equipment are getting higher and higher. However, the improvement of circuit integration in electronic equipment also increases the density of chips and other components on the printed circuit board, and reduces the spacing between components, making the electromagnetic interference (EMI) in electronic equipment more obvious. [0003] For Class D audio power amplifier, because of its high efficiency and low power consumption, it has gradually become a widely used technology in the market. Class D audio power amplifiers use pulse width modulation (PWM) technology ...
Claims
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Login to View More IPC IPC(8): H03F3/217
CPCH03F3/217Y02B70/10
Inventor 杨志飞
Owner SHANGHAI AWINIC TECH CO LTD