Communication device, image exposure device, image reading device, and image forming apparatus
AssigneeFUJIFILM Business Innovation Corp.
InventorAkihiro Narusawa
Life of this patent
Estimating the term…
Abstract
A communication device includes a transmission-side board that transmits a signal, a reception-side board that receives the signal transmitted from the transmission-side board, a cable for connecting the transmission-side board and the reception-side board, and plural noise attenuation units that attenuate high frequency noise and are disposed at plural positions in a maximization region of a high frequency current corresponding to plural n-th order resonance frequencies, the plural positions including portions of the cable other than an end portion of the cable, the plural n-th order resonance frequencies being determined by a length of the cable, and n being an integer of 1 or more.
Claims16
A communication device comprising:
- a transmission-side board that transmits a signal;
- a reception-side board that receives the signal transmitted from the transmission-side board;
- a cable for connecting the transmission-side board and the reception-side board;
- and
- a plurality of noise attenuation units that attenuate high frequency noise and are disposed at a plurality of positions in a maximization region of a high frequency current corresponding to a plurality of n-th order resonance frequencies, the plurality of positions including portions of the cable other than an end portion of the cable, the plurality of n-th order resonance frequencies being determined by a length of the cable, and n being an integer of 1 or more.
A communication device comprising:
- a transmission-side board that transmits a signal by a high-speed serial communication method;
- a reception-side board that receives the signal transmitted from the transmission-side board;
- a cable for connecting the transmission-side board and the reception-side board;
- and
- a plurality of noise attenuation units that attenuate high frequency noise and are respectively disposed at a position of 4/10+5% of a total length from an end portion of the cable in a longitudinal direction of the cable and positions within 1/10 of the total length from the end portion of the cable in the longitudinal direction, the positions corresponding to all of a primary resonance frequency to a quaternary resonance frequency.
A communication device comprising:
- a transmission-side board that transmits a signal by a high-speed serial communication method;
- a reception-side board that receives the signal transmitted from the transmission-side board;
- a cable for connecting the transmission-side board and the reception-side board;
- and
- a plurality of noise attenuation units that attenuate high frequency noise and are respectively disposed at a position of ½±5% of a total length from an end portion of the cable in a longitudinal direction of the cable and positions of ¼ to ⅓ of the total length from the end portion of the cable in the longitudinal direction, the positions corresponding to both of a tertiary resonance frequency and a quaternary resonance frequency.
Dependencies are inferred from the claim text.