Canon Kabushiki Kaisha

Daishiro Sekijima

Hideho Inagawa

Hiroyuki Yamaguchi

Takeshi Ide

Masafumi Kamei

Tsunao Hombo

Yoshiyuki Imanaka

Shinichi Nishimura

Kazunori Masuda

Ryoji Oohashi

Seiji Hayashi

Takashi Aoki

Satoshi Sugimoto

Shin'ichi Nishimura

Shin′ichi Nishimura

A low pass filtercomprises an inductor unitcomprising first and second inductorsand, an input side capacitor unitprovided on a signal input side of the inductor unit, and an output side capacitor unitprovided on a signal output side of the inductor unit. The input side capacitor unitcomprises a first capacitorprovided between the signal lines. Further, the input side capacitor unitcomprises a second capacitorwherein one end is connected to a signal input endof the first inductor, and the other end is connected to a ground (GND), and a third capacitorwherein one end is connected to a signal input endof the second inductor, and the other end is connected to a ground (GND).

Differential transmission circuit having an inductor unit and capacitor units configured to attenuate a common-mode digital signal component

A power source circuit includes a switching circuitthat converts a direct current voltage obtained by converting an alternating voltage from an alternating power source input through a pair of power supply linesandinto a predetermined direct current voltage by a switching operation. A fuseis provided on one power supply line. A series circuitincluding a first line bypass capacitorand a resistor elementis connected between one power supply lineand a ground. A second line bypass capacitoris connected between the other power supply lineand the ground. Imbalance of the circuit by an excess current protection element is prevented to reduce common mode noise.

Printed circuit board

In a power source circuit including a switching circuitas a power conversion circuit for converting by a switching operation at least one of a frequency and a voltage of an alternating voltage from an alternating power sourcevia a pair of supply linesand, one supply lineincludes a fuseas an excess current protection element, and between a ground lineand one supply line, a first line bypass capacitoris connected. Between the ground lineand another supply line, a second line bypass capacitoris connected, and another supply lineincludes an inductor. With this configuration, an unbalanced state of the circuit due to the excess current protection element is reduced so as to restrain the common mode noise.

Power source circuit

A liquid discharge head includes a heat generating element which generates heat energy used to discharge a liquid; a temperature detecting element which changes in output voltage in response to a change in the temperature of the heat generating element; an electrical power source line and a grounding line electrically connected to each other through the heat generating element to apply a current to the heat generating element; and a pair of lines for temperature detection electrically connected to each other through the temperature detecting element to apply a current to the temperature detecting element. Here, each of the pair of lines for temperature detection is arranged adjacent to the other.

Liquid discharge head and ink jet recording apparatus including liquid discharge head

A digital electronic apparatus includes a plurality of units and a cable. The plurality of units have metallic housings and are combined such that surfaces of the metallic housings are opposed to each other. The cable is laid on a surface of the metallic housing of at least one of the units. The surface on which the cable is laid is other than the surfaces of the metallic housings that are opposed to each other.

Digital electronic apparatus with suppressed radiant noise

A cable arranging structure for exchanging electric signals between a pair of printed circuit boards includes at least a pair of electrically conductive members adapted to arrange the cable between them over the entire length thereof. The electrically conductive members show an electric potential substantially equal to that of the ground. Such a structure requires only the two electrically conductive members to be rigidly secured so that radiant noises generated by the cable can be effectively suppressed by means of the structure without the need of deforming the cable.

Growing community of inventors

Tokyo, Japan

Daishiro Sekijima