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Noise suppressing device, image reading device, and image forming apparatus

  • US 9,742,950 B2
  • Filed: 02/11/2016
  • Issued: 08/22/2017
  • Est. Priority Date: 09/24/2015
  • Status: Active Grant
First Claim
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1. A noise suppressing device comprising:

  • a first circuit board that is ungrounded;

    a second circuit board connected to the first circuit board through a transmission line including;

    a signal line configured to transmit a high-frequency signal; and

    a ground line,wherein the second circuit board includes a ground layer that is grounded; and

    a high-frequency reducing element that is arranged between the ground layer of the second circuit board and the ground line of the transmission line and that is configured to reduce a high-frequency signal excited at the ground line of the transmission line,wherein the high-frequency reducing element comprises a high-frequency reducing coil.

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