Novel magnetic card reading circuit structure
A circuit structure and circuit technology, applied in the direction of electromagnetic radiation induction, etc., can solve the problems of complex peripheral circuits, complex magnetic card reading circuit structures, and high costs, and achieve the effects of fewer peripheral devices, lower circuit costs, and simplified circuits.
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[0014] Such as figure 1 or figure 2 As shown, the application includes a read head 1, an amplification filter circuit 2, a delay circuit 3, a comparison shaping circuit 4 and a processor 5, the output end of the read head 1 is connected to the input end of the amplification filter circuit 2, and the amplification filter circuit 2 The output end of the delay circuit 3 is connected to the input end of the delay circuit 3, the output end of the delay circuit 3 is connected to the input end of the comparison shaping circuit 4, and the output end of the comparison shaping circuit 4 is connected to the processor 5.
[0015] Such as figure 2 As shown, the amplification and filtering circuit 2 is composed of U1A, resistors R1 and R2, and capacitor C1.
[0016] The comparison shaping circuit 3 is composed of U1B, resistors R3 and R4.
[0017] This application uses a four-gate operational amplifier to read the weak triangular wave signals of two magnetic card tracks, and each track...
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