Minolta Camera Kabushiki Kaisha

Minolta Company, Ltd.

Sharp Kabushiki Kaisha Corporation

Konica Minolta Business Technologies, Inc.

Minolta Camera Co., Ltd.

Minolta Camera Kabisha Kaisha

Akio Nakajima

Munehiro Nakatani

Hideo Muramatsu

Yoshikazu Ikenoue

Masamichi Sugiura

Hiroyuki Suzuki

Eiichi Yoshida

Takeshi Morikawa

Atsushi Ishikawa

Hirofumi Hasegawa

Masamichi Kishi

Tomoyuki Atsumi

Keiji Nakatani

Toshio Tsuboi

Hirokazu Yamada

Toshihisa Motosugi

Hideo Kumashiro

Seiichiro Kihara

Eiichiro Kawasaki

Kanako Hamano

Kazuyuki Kawabata

Kenichi Matsumoto

Kaoru Tada

Keiji Kusumoto

Kentaro Nagatani

Tomoko Maruyama

Shigenobu Fukushima

Masanori Yamamoto

Katsuaki Tajima

Hiroaki Hamano

Hirohisa Warita

Hiroya Sugawa

Tetsuya Itoh

Syuji Maruta

Yoshiyuki Kurahashi

Koichi Hanafusa

Takao Matsui

Hisao Ichijoh

Sou Hirota

Isao Satoh

Kohichi Furuta

Provided is a composite semiconductor device that has a low on-resistance and a high load-short-circuit resistance. In a composite semiconductor device () including a normally-on first FET (Q) and a normally-off second FET (Q) that are cascode-connected to each other. In a case where a voltage applied to a drain of the first FET (Q) is 400 V, a relation of the following expression is satisfied: where a time elapsed after short circuit T represents a time elapsed after a time at which a load connected to the composite semiconductor device () starts to be short-circuited, RonQrepresents a value of an on-resistance of the second FET, VTHQrepresents a threshold voltage of the first FET, Idmaxrepresents a drain current of the first FET in a saturated state of the first FET when a gate voltage of the first FET is 0 V, and Idmax represents a drain current limited to an extent that breakdown of the first FET is prevented for the time elapsed after short circuit T of at least 2 &#x3bc;sec.

Composite semiconductor device

A driver circuit includes normally-on first and second transistors, a first control circuit for controlling the first transistor in response to a first control signal, a second control circuit for controlling the second transistor in response to a second control signal, a capacitor connected between first and second power supply nodes of the first control circuit, a power supply connected between third and fourth power supply nodes of the second control circuit, a switch element connected between first and fourth power supply nodes, and a third control circuit for turning the switch element on when an output voltage becomes about 0V.

Driver circuit

A gate driver circuit that can supply a negative gate voltage to a high-side circuit without being additionally provided with an insulated power supply is realized. A driver circuit is configured such that a half-bridge circuit in which a first transistor and a second transistor are connected in series includes a capacitor that supplies a negative gate voltage to a high-side first transistor via a first control circuit, and a control circuit power supply that supplies a negative gate voltage to a low-side second transistor via a second control circuit, one end of the capacitor being connected to a negative voltage VEE on a negative terminal side of the control circuit power supply via a switching element, and the other end being connected to a voltage on an output terminal, wherein the switching element is controlled to be on upon a timing when the second transistor is turned on.

An image forming apparatus that executes a job and determines a billing amount for the job depending on a parameter value given to a parameter that relates to the execution of the job, the image forming apparatus comprising: a storage that stores therein a first table and a second table, the first table defining billing amounts for a plurality of non-overlapping value ranges in one-to-one correspondence, the second table defining billing amounts for a plurality of specific values in one-to-one correspondence; and a determiner operable to refer to the second table before referring to the first table and judge whether the parameter value is identical to any one of the plurality of specific values in the second table (step S), and if identical (Yes in step S), determine the billing amount for the job according to the second table (step S).

Image forming apparatus, billing amount determination method and billing system

Allocation reading is started when an allocation origin image processing apparatus sends an allocation reading start alert. An image processing apparatus which received the allocation reading start alert, i.e., the allocation destination image processing apparatus, displays a continue reading specification key on its own display for user specification to continue reading by the allocation reading function. Continue reading is started by user operation of this continue reading specification key. That is, when a document image is read by the allocation destination image processing apparatus, the image data are transmitted to the allocation origin image processing apparatus. Then, the allocation origin image processing apparatus integrates the received image data with the image data read by the allocation origin image processing apparatus.

Image processing system and apparatus for allocation reading

A light modulation type photointerrupter includes: a light source that emits a light pulse to a transit area where an object transits; a driving circuit that drives the light source to emit the light pulse; a photoreceptor that converts the light pulse from the transit area into a pulse current and outputs the pulse current; an integrating circuit that integrates a pulse signal resulting from the pulse current and outputs a result of the integration, the integrating circuit having different time constants at a rise and at a fall of the pulse signal; and a detecting circuit that detects, based upon the output from the integrating circuit, presence or absence of the object in the transit area. The light source is driven to emit a pulse, which reduces the loss of power in the light emitter and the consumption of the current.

Light modulation type photointerrupter

There is provided a printer management method in a computer system of the present invention, which controls a plurality of printers connected to a network, including acquiring information related to an elapsed time from the time when each printer made a transition to the power save mode, and selecting a printer based on the acquired information related to the elapsed time. According to the present invention, a printer can be appropriately selected even when printers are waiting in the power save mode.

Printer management method and management system

An image forming apparatus receives a print request and image information data from a terminal device connected to it via a network and executes a print job. The print job processing status is stored in a non-volatile memory. When the power to the printer is restored after being terminated, where print jobs that have not yet been processed are determined to exist after reference to the print job processing status stored in the non-volatile memory. The terminal device that requested said print job is requested to resend the image information data for that print job. Therefore, if the terminal device is constructed such that it receives the resend request and resends the image information data, the image forming apparatus can smoothly execute the non-processed print jobs based on the resent image information data.

Image forming apparatus and terminal device connected to network

A comparator circuit includes a differential amplifier including load resistors, for amplifying difference between two input voltages of the comparator circuit; an emitter follower circuit for applying positive feedback with respect to a differential amplifier and outputting an output voltage of the comparator circuit; and a grounded-base amplifier, and outputting an output voltage of the comparator circuit, for realizing both voltage output and current output. A grounded-base amplifier includes two transistors each of which has a base supplied with a reference voltage. The differential amplifier includes two load resistors respectively connected to each emitter of the transistors of the grounded-base amplifier. The load resistor flowing a current which is obtained through a collector of the transistor as an output current of the comparator. With this arrangement, it is not necessary to provide a current switch circuit for obtaining current output of the comparator circuit.

Comparator circuit

In a conventional stabilized direct-current power supply device with a soft starting function, soft starting is achieved by exploiting the rise in a reference voltage. Thus, soft starting is impossible when the reference voltage has already risen. A stabilized direct-current power supply device of the invention has a current suppression circuit that, when the output voltage rises, suppresses the current output from a voltage conversion circuit that converts the input voltage into the output voltage to be fed out. Thus, soft starting is possible even when the reference voltage has already risen.

Stabilized direct-current power supply device

A dropper-type DC stabilized power supply circuit is arranged such that a power transistor is connected in series with a power source line, a first difference amplifier compares (i) a feedback value acquired by dividing an output voltage with (ii) a reference voltage. The first difference amplifier controls the base current of the power transistor with reference to the difference above so as to stabilize the output voltage. This DC stabilized power supply circuit is additionally provided with second and third difference amplifiers having respective offset voltages in inputs thereof. When the output voltage surpasses a predetermined voltage level, the second difference amplifier restrains the base current. On the contrary, when the output voltage falls below a predetermined voltage level, the third difference amplifier increases a bias current of the first difference amplifier so as to increase the gain.

Dropper-type DC stabilized power supply circuit provided with difference amplifiers for supplying a stable output voltage

In the image data processing of the digital copying machine (M), the image data is assigned to the expanders ( ) in such a manner that the expansion time of each of the expanders ( ) is close to one another. Thus, because the difference of the expansion time between the expanders ( ) is very close to one another, both of the expanders ( ) can be efficiently used so that the timing when printing can be started is quickened. In consequence, the speed of expansion processing or print processing is improved.

Image data processing apparatus and image data processing method

The present invention provides a semiconductor device having multilayer interconnections including a first interconnection and a second interconnection, wherein: the second interconnection is formed to be connected to one of a ground, a positive power source and a negative power source; the second interconnection is formed either not to be electrically connected to the first interconnection or to be connected to the first interconnection in a high impedance state; and the first interconnection and the second interconnection are electrically connected to each other during or after a characteristic inspection during which the second interconnection is provided with a pad for inspecting characteristics of the semiconductor device.

Semiconductor device and method for producing the same

A current detection resistance such as a metal resistance is formed in series with a power transistor, and in response to an output voltage of the current detection resistance, an overcurrent protective circuit performs an overcurrent suppressing operation with high accuracy without being affected by irregularity of a current multiplication factor, etc.; thus, it is possible to realize a smaller chip area so as to reduce the cost. Furthermore, a short-circuit protective circuit returns a terminal voltage of a referenced resistance, that appears in accordance with a partial pressure value of an output voltage, at the transistor, a partial pressure resistance, and a current mirror circuit. And the short-circuit protective circuit controls a potential of a base resistance and suppresses a base current. Hence, it is not necessary to dispose the transistor for suppressing a current between base lines, so that a low-voltage operation can be realized. In a direct-current stabilization power supply device having a two-chip structure of a PNP power transistor and a control IC, it is possible to achieve a smaller chip area and a low-voltage operation.

Direct-current stabilization power supply device

Originals are fed onto a platen glass one by one by an automatic original feeder to be read out by a reading system. The originals are converted into digital image data. The image data is transferred to a memory unit. The memory unit is controlled by a CPU. The memory unit is configured of an image memory, a sentence direction recognizing portion, an RAM producing a management table, an original direction (top and bottom direction) recognizing portion, a rotation processing portion, a sign memory and the like. Based on top and bottom directions of original images and directions in which sentences run included in the images, arrangement of images in a 2in1 or 4in1 mode is determined.

Image forming apparatus having editing function

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Toyokawa, Japan

Akio Nakajima