Reduce the infrared signal processing circuit of interference

Reduce the infrared signal processing circuit of interference

CN
  • CN 103,312,348 B
  • Filed: 06/28/2013
  • Issued: 10/28/2015
  • Est. Priority Date: 06/28/2013
  • Status: Active Grant
First Claim
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1. reduce the infrared signal processing circuit of interference, comprise one-level amplifying circuit, described one-level amplifying circuit comprises operational amplifier U6-A, the in-phase input end electrical connection infrared signal input IR_SIG_IN of described operational amplifier U6-A, it is characterized in that, the output of described operational amplifier U6-A is electrically connected with the first filter circuit of pressure-stabilizing, described first filter circuit of pressure-stabilizing comprises two ends and is electrically connected the inverting input of described operational amplifier U6-A and the resistance R14 of output respectively, described first filter circuit of pressure-stabilizing also comprises the diode D5 that anode is electrically connected with the output of described operational amplifier U6-A, the cathodic electricity of described diode D5 connects the inverting input of described operational amplifier U6-A, the output of described operational amplifier U6-A is also electrically connected with infrared signal output IR_SIG_OUT,Level 2 buffering circuit is also electrically connected with between the output of described operational amplifier U6-A and described infrared signal output IR_SIG_OUT;

  • Described level 2 buffering circuit comprises voltage follower U5-B, the in-phase input end of described voltage follower U5-B is electrically connected the output of described operational amplifier U6-A, the output of described voltage follower U5-B is electrically connected with the second filter circuit of pressure-stabilizing, and the output of described voltage follower U5-B is also electrically connected described infrared signal output IR_SIG_OUT.

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