Detection circuit and system
A technology for detecting circuits and circuits, which is applied in the field of circuits, can solve problems such as inability to accurately hear the sound signal of the speaker, unqualified noise-cancelling microphones, and reduced accuracy of noise-cancelling microphones
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[0020] 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 some, not all, embodiments of the present invention. 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.
[0021] An embodiment of the present invention provides a detection circuit, such as figure 1 As shown, it includes: a microphone 101 , a light emitting device 102 and a main control chip 103 .
[0022] The main control chip 103 is connected with the microphone 101 ; the main control chip 103 is also connected with the light emitting device 102 .
[0023] The microphone 101 is used to receive a test sound signal, convert the test sound signal into a current signal ...
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