An extended pickup with mute function and its realization method
A pickup and mute technology, applied in transducer circuits, sensors, sensor parts, etc., can solve the problems of unreliable pulse signal transmission, missed detection of pulse signals, etc., and achieve reliable digital control signal communication, strong anti-interference ability, Good real-time effect
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[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0035] refer to Figure 1 to Figure 7 As shown, the present invention discloses an extended pickup with a mute function, which consists of an extended microphone 1 and a host 2, such as figure 1 As shown, the main unit includes but not limited to the conference phone, and the extension microphone 1 is connected to the main unit 2 through a power line, a ground line and two analog differential signal lines, such as figure 1 As shown, wherein, the host 2 includes a main control chip 21, a first MCU 22, an analog-to-digital converter 23, a differential-to-single-ended circuit 24, a first digital signal generating circuit 25, and a first digital signal receiving circuit 26; the extension microphone 1 includes a microphone 11. Audio amplification and filtering circuit 12 , single-ended to differential conversion circuit 13 , second digital signal...
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