NOISE SUPPRESSING DEVICE, IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS

• US 20170094092A1
• Filed: 02/11/2016
• Published: 03/30/2017
• Est. Priority Date: 09/24/2015
• Status: Active Grant

• Current Assignee: Fujifilm Business Innovation Corp. (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: ASANO, Motohiro
• Granted Patent: US 9,742,950 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 1/0083 Arrangements for transferring signals between different components of the apparatus, e.g. arrangements of signal lines or cables for control or supervision between image input and output device H04N1/32
• CPC Class Codes: H04N 1/00933 Timing control or synchronising H04N1/00928, H04N1/00931, H04N1/00954 and H04N1/0096 take precedence
• CPC Class Codes: H04N 1/00994 Compensating for electric noise, e.g. electromagnetic interference
• CPC Class Codes: H04N 1/409 Edge or detail enhancement; Noise or error suppression
• CPC Class Codes: H04N 1/56 Processing of colour picture signals H04N1/52 takes precedence
• CPC Class Codes: H04N 2201/0091 Digital copier; digital 'photocopier' H04N2201/0093 and H04N2201/0094 take precedence

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.

Claims

1. A noise suppressing device comprising:

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.

2. An image reading device comprising:

an image reading substrate that is a substrate having mounted thereon an image reading element that reads an image, the image reading substrate not being grounded;

a control substrate connected to the image reading substrate through a transmission line including a signal line that transmits a high-frequency signal and a ground line, the control substrate including a ground layer being 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 reduces a high-frequency signal excited at the ground line of the transmission line.

3. An image forming apparatus comprising:

the image reading device according to claim 2; and

an image forming section that forms an image read by the image reading device, on a recording medium.