Noise suppressing device, image reading device, and image forming apparatus
First Claim
Patent Images
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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Abstract
A noise suppressing device includes a first circuit board not being grounded; a second circuit board connected to the first circuit board through a transmission line including a signal line that transmits a high-frequency signal and a ground line, the second circuit board including a ground layer being 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 reduces a high-frequency signal excited at the ground line of the transmission line.
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Citations
7 Claims
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1. A noise suppressing device comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. An image reading device comprising:
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an image reading substrate that is a substrate having mounted thereon an image reading element configured to read an image, wherein the image reading substrate is ungrounded; a control substrate connected to the image reading substrate through a transmission line including; a signal line configured to transmit a high-frequency signals; and a ground line, wherein the control substrate includes a ground layer that is grounded; and a high-frequency reducing element that is arranged between the ground layer of the control substrate 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. - View Dependent Claims (7)
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Specification