The Solution to the Interference of Digital Circuits on Analog Audio Circuits
An analog audio and digital circuit technology, applied in transducer circuits, electrical components, sensor parts, etc., can solve problems such as high noise and inability to effectively suppress electromagnetic wave interference, and achieve the effect of improving the quality of analog audio
Active Publication Date: 2019-12-13
成都共同进步信息技术有限公司
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AI Technical Summary
Problems solved by technology
Although there is currently a separate chip for the digital circuit and the analog audio circuit to reduce interference to the analog audio circuit, due to audio circuit wiring and other reasons, the ground area of the analog audio circuit is usually smaller than that of the digital circuit, which causes There is a lot of noise, and it cannot effectively suppress electromagnetic wave interference
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] The digital circuit of the present invention interferes with the solution to the analog audio circuit, comprising:
[0017] A. In the circuit, there are digital circuit grounding structures and analog audio circuit grounding structures that are not on the same ground plane and are arranged at intervals, as well as a processor; the digital circuit grounding structure and the analog audio circuit grounding structure are physically isolated from each other , to avoid interfering with signal transmission. At the same time, the grounding area of the grounding structure of the digital circuit is larger than that of the grounding structure of the analog audio circuit, further reducing clutter and interference signals of the analog audio circuit. Between the digital circuit grounding structure and the analog audio circuit grounding structure, there is also a filter component structure with a capacitive inductance filter structure. The two ends of the filter component structur...
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The invention relates to a solution method on analog audio circuit interference by a digital circuit. The method comprises the following steps: A, arranging a digital circuit ground structure and an analog audio circuit ground structure which are not located at the same ground plane and arranged at intervals and a processor in a circuit; B, acquiring signals before the analog audio circuit is interfered and when the analog audio circuit is interfered; C, performing self-adaptive filtering on the analog audio circuit through the processor to acquire an error value corresponding to the signal in interference; D, comparing the error value with the preset threshold, if the error value is greater than the threshold, judging that the signal in interference is the interference signal, otherwise, not processing the signal in interference; and E, replacing the interference by an output signal after the self-adaptive filtering in the step C. By using the solution method disclosed by the invention, the noise, electromagnetic wave and other interference on the analog audio circuit by the digital circuit can be effectively avoided.
Description
technical field [0001] The invention relates to a circuit anti-interference method, in particular to a solution to the interference of a digital circuit to an analog audio circuit. Background technique [0002] In the circuit structure of integrated digital circuit and analog audio circuit, the digital circuit is easy to cause interference to the signal of the analog audio circuit, and the reasons include pulse interference, electromagnetic interference and so on. Although there is currently a separate chip for the digital circuit and the analog audio circuit to reduce interference to the analog audio circuit, due to audio circuit wiring and other reasons, the ground area of the analog audio circuit is usually smaller than the ground area of the digital circuit. There is a lot of noise, and electromagnetic wave interference cannot be effectively suppressed. Contents of the invention [0003] The invention provides a solution to the interference of a digital circuit to...
Claims
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IPC IPC(8): H04R3/00
CPCH04R3/00
Inventor 雷平艾天生
Owner 成都共同进步信息技术有限公司