Patent application number | Description | Published |
20130328626 | BIAS CONTROL CIRCUIT - The problem to be solved is to alleviate the distortion characteristic of an amplifier and to prevent the drop in gain with respect to a low-level high-frequency signal. A bias control circuit ( | 12-12-2013 |
20140070891 | HIGH FREQUENCY AMPLIFIER - To prevent a wrap-around signal from an output detection circuit unit that occurs when commonality is achieved between the power supply of the output detection circuit unit and the bias power supply of a power amplification unit. When commonality is achieved between the power supply of a diode of an output detection circuit unit and the power supply of a bias circuit, a resonance circuit is connected between the bias circuit and the output detection circuit unit, thereby preventing a wrap-around signal from the output side of a power amplification transistor from being input to the input side of the power amplification transistor. | 03-13-2014 |
20140210556 | HIGH-FREQUENCY AMPLIFIER - Since a high-frequency signal that is output from a high-frequency oscillator circuit section is detected in a detector circuit and a bias of a negative voltage is supplied from a bias circuit section to the high-frequency amplifier circuit section with a detection voltage that is detected, a negative power supply circuit such as a DC/DC converter or a peripheral circuit is not required, and since a negative bias voltage can be supplied to a high-frequency amplifier circuit, downsizing can be achieved with a low cost. | 07-31-2014 |
20140312972 | HIGH-FREQUENCY AMPLIFIER CIRCUIT, SEMICONDUCTOR DEVICE, AND MAGNETIC RECORDING AND REPRODUCING DEVICE - A high-frequency amplifier circuit includes a balanced-unbalanced converter converting a single-ended signal into differential signals. The output of a first amplifier amplifying the single-ended signal is connected to the signal terminal on the unbalanced side of the balanced-unbalanced converter. The input of a second amplifier amplifying one of the differential signals is connected to one signal terminal on the balanced side of the balanced-unbalanced converter. The input of a third amplifier amplifying another of the differential signals is connected to another signal terminal on the balanced side of the balanced-unbalanced converter. An impedance element is inserted between an element on the balanced side of the balanced-unbalanced converter and a ground. | 10-23-2014 |
20150180419 | HIGH-FREQUENCY AMPLIFIER - There is provided a high-frequency amplifier including a divider, a plurality of amplifiers for amplifying a high-frequency signal distributed by the divider and outputting the amplified high-frequency signal, a combiner for combining amplified high-frequency signals, a base substrate, a conductor pattern that is connected to a ground end of each of the amplifiers, and a ground electrode. Each of the conductor patterns has a first conductive portion. A slot is disposed between the two conductor patterns connected to the corresponding adjacent amplifiers. Between the adjacent amplifiers, two vias are formed so that the slot is sandwiched between the vias. One of the two conductor patterns is connected to the ground electrode via one of the two vias, and the other one of the conductor patterns is connected to the ground electrode via the other one of the two vias. | 06-25-2015 |
Patent application number | Description | Published |
20090047041 | IMAGE FORMING APPARATUS, DEVELOPING APPARATUS AND CONTACT-RETRACTING METHOD - The image forming apparatus is provided with: an image carrier; an exposure member that exposes the image carrier and forms an electrostatic latent image on the image carrier; a developing member that develops the electrostatic latent image formed on the image carrier; and a contact-retracting unit that rotates the developing member taking a predetermined position as the rotational center, and brings the developing member in contact with or proximity to the image carrier or retracts the developing member from the image carrier. | 02-19-2009 |
20090052938 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image carrier; a latent-image forming device; a developing device; a latent-image forming device contacting/separating mechanism; and a developing device contacting/separating mechanism, and the latent-image forming device contacting/separating mechanism allows the latent-image forming device to be movable to the latent-image forming device contacting position in a state where the developing device is moved to the developing device contacting position. | 02-26-2009 |
20090129820 | DEVELOPMENT APPARATUS AND IMAGE FORMING APPARATUS - There is provided a development apparatus including: a first developer storage container and a second developer storage container that store developer, having a first a and second openings, respectively; a first transport member provided within the first developer storage container, and that causes the developer to move to the second developer storage container via the first opening; a second transport member provided within the second developer storage container, and that causes the developer to move to the first developer storage container via the second opening; a developer holding member that performs development by causing the developer to move to a position facing an image holding body on which a latent image is formed; and a moving member provided so as to fit between an inner wall face of the second developer storage container and an outer edge of the second transport member. | 05-21-2009 |
20110073520 | CUSHIONING MEMBER - When a cushioning member is fitted to a tubular part in a first facing direction, an inner circumferential surface of the tubular part contacts a part of a second protruding portion, a first portion of a first protruding portion contacts a first contact region, a second portion of a third protruding portion contacts a second contact region, a third portion of the third protruding portion contacts a third contact region, and a distance between the first contact region and the second contact region is smaller than a distance between the first contact region and the third contact region, and a length of the second contact region from a base portion in a direction of protrusion is greater than a length of the third contact region from the base portion in a direction of protrusion. | 03-31-2011 |
20120114389 | POWDER CONTAINER, IMAGE FORMING APPARATUS, AND POWDER CONTAINER CONTROLLING METHOD - A powder container includes a containing portion that is capable of containing powder therein, the containing portion having an opening through which the powder passes; an opening/closing member that is supported by the containing portion so as to be movable between an open position at which the opening is open and a closed position at which the opening/closing member closes the opening; and an engaged portion disposed on a side surface of the opening/closing member with respect to an installation direction, the installation direction being a direction in which the containing portion is removably installed into an apparatus, the engaged portion restraining a movement of the opening/closing member by being engaged with an engaging portion of the apparatus when the containing portion is installed in the apparatus. | 05-10-2012 |
Patent application number | Description | Published |
20090238608 | STORAGE CONTAINER AND IMAGE FORMING APPARATUS - A storage container includes: a storage container main body; a flow-out opening; a shutter; a seal member; a restricting portion; and an open-close movement restricting portion. | 09-24-2009 |
20110076061 | POWDER STORAGE CONTAINER AND IMAGE FORMING APPARATUS USING THE SAME - A powder storage container includes a container body, an opening formed in a portion of the container body, an opening-and-closing cover, a cover holding frame, a protrusion portion provided in the opening-and-closing cover, a blocking portion provided in the cover holding frame, a position regulating protrusion protruding from the cover holding frame, and a disengagement suppressing protrusion provided in the opening-and-closing cover. When the opening-and-closing cover takes such an attitude that the opening-and-closing cover is swingably supported by a contact portion, serving as a fulcrum, between the disengagement suppressing protrusion and the cover holding frame and is arranged along the opening-and-closing operation direction, a distal end position of the protrusion portion is located in a position where the distal end position can be released from the blocking portion. | 03-31-2011 |
20120003013 | DEVELOPER CONTAINER AND IMAGE FORMING APPARATUS USING THE SAME - A developer container is provided with a container body. An opening is formed through the container body. An opening/closing lid closes the opening. A lid holding frame holds the opening/closing lid in such a manner that the opening/closing lid can move between an open position and a closed position. A stopper stops the opening/closing lid and thereby preventing it from moving toward the open position in a state that the opening/closing lid is located at the closed position. A contact portion comes into contact with a hook portion provided in a container receiving portion when the developer container is inserted into the container receiving portion. A deformable portion deforms the stopper to such an extent that the stopping of the opening/closing lid by the stopper is canceled when the developer container is inserted into the container receiving portion and the contact portion comes into contact with the hook portion. | 01-05-2012 |
20120114385 | DEVELOPER CONTAINER, IMAGE FORMING APPARATUS, AND DEVELOPER CONTAINER CONTROLLING METHOD - A developer container includes a containing portion that is capable of containing a developer therein, the containing portion having an opening through which the developer passes; a first opening/closing member that is movable between a first open position at which the opening is open and a first closed position at which the first opening/closing member closes the opening; and a second opening/closing member that is movable between a second closed position at which the second opening/closing member doubly closes the opening by covering an outside of the first opening/closing member and a second open position at which the first opening/closing member is exposed to the outside, wherein a direction in which the second opening/closing member moves between the second open position and the second closed position is different from a direction in which the first opening/closing member moves between the first open position and the first closed position. | 05-10-2012 |
20120328333 | IMAGE FORMING APPARATUS COMPONENT POSITIONING MECHANISM - An image forming apparatus includes: an image carrier; a latent-image forming device; a developing device; a latent-image forming device contacting/separating mechanism; and a developing device contacting/separating mechanism, and the latent-image forming device contacting/separating mechanism allows the latent-image forming device to be movable to the latent-image forming device contacting position in a state where the developing device is moved to the developing device contacting position. | 12-27-2012 |