Patents by Inventor Katsuhiko Manabe
Katsuhiko Manabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 7701187Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: GrantFiled: July 1, 2008Date of Patent: April 20, 2010Assignee: Ricoh Company, Ltd.Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Publication number: 20080272759Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: ApplicationFiled: July 1, 2008Publication date: November 6, 2008Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Patent number: 7408334Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: GrantFiled: February 13, 2007Date of Patent: August 5, 2008Assignee: Ricoh Company, Ltd.Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Patent number: 7333131Abstract: A method and apparatus of detecting a connection status of a digital video apparatus to a peripheral apparatus includes a digital video encoder configured to receive a digital video signal, and convert and output the digital video signal into an analog video signal, and a determination circuit configured to detect a voltage level of a horizontal synchronization signal of the analog video signal in a vertical blanking time determined by vertical synchronization signals, and determine whether the digital video apparatus is connected to a peripheral apparatus based on a detection result of the voltage of the horizontal synchronization signal of the analog video signal.Type: GrantFiled: September 14, 2004Date of Patent: February 19, 2008Assignee: Ricoh Company, Ltd.Inventor: Katsuhiko Manabe
-
Publication number: 20070145963Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: ApplicationFiled: February 13, 2007Publication date: June 28, 2007Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Patent number: 7193400Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: GrantFiled: February 10, 2006Date of Patent: March 20, 2007Assignee: Ricoh Company, Ltd.Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Patent number: 7146194Abstract: An amplifying circuit includes a battery power source, a regulator that regulates an output of the battery power source and generates a reference voltage, and a signal ground generating device that generates and outputs a signal ground by changing the reference voltage in accordance with deterioration detected from the battery power source. An operational amplifier is provided to amplify and output a signal having prescribed waveform to be input to a speaker. The operational amplifier uses a battery power source as a driving power source of its own. The signal ground is positioned at a center of vibration amplitude of the waveform.Type: GrantFiled: September 30, 2003Date of Patent: December 5, 2006Assignee: Ricoh Company, Ltd.Inventors: Makoto Matsushima, Katsuhiko Manabe
-
Patent number: 7075279Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: GrantFiled: June 30, 2005Date of Patent: July 11, 2006Assignee: Ricoh Company, Ltd.Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Publication number: 20060125459Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: ApplicationFiled: February 10, 2006Publication date: June 15, 2006Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Publication number: 20060001411Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: ApplicationFiled: June 30, 2005Publication date: January 5, 2006Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Patent number: 6922043Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: GrantFiled: September 3, 2003Date of Patent: July 26, 2005Assignee: Ricoh Company, LTDInventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Publication number: 20050078219Abstract: A method and apparatus of detecting a connection status of a digital video apparatus to a peripheral apparatus includes a digital video encoder configured to receive a digital video signal, and convert and output the digital video signal into an analog video signal, and a determination circuit configured to detect a voltage level of a horizontal synchronization signal of the analog video signal in a vertical blanking time determined by vertical synchronization signals, and determine whether the digital video apparatus is connected to a peripheral apparatus based on a detection result of the voltage of the horizontal synchronization signal of the analog video signal.Type: ApplicationFiled: September 14, 2004Publication date: April 14, 2005Inventor: Katsuhiko Manabe
-
Publication number: 20040116162Abstract: An amplifying circuit includes a battery power source, a regulator that regulates an output of the battery power source and generates a reference voltage, and a signal ground generating device that generates and outputs a signal ground by changing the reference voltage in accordance with deterioration detected from the battery power source. An operational amplifier is provided to amplify and output a signal having prescribed waveform to be input to a speaker. The operational amplifier uses a battery power source as a driving power source of its own. The signal ground is positioned at a center of vibration amplitude of the waveform.Type: ApplicationFiled: September 30, 2003Publication date: June 17, 2004Inventors: Makoto Matsushima, Katsuhiko Manabe
-
Publication number: 20040104715Abstract: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock signal to a gate of the semiconductor switch to be utilized for controlling an on/off time of the semiconductor switch such that a predetermined power is output from the generator, and a drive circuit for switching the semiconductor switch to the continuous-on state according to a halt mode setting requirement regardless of the clock signal, when the semiconductor switch, normally repeating on/off operations responsive to the clock signal, is in its off-state.Type: ApplicationFiled: September 3, 2003Publication date: June 3, 2004Inventors: Katsuhiko Manabe, Tomonari Katoh, Minoru Sugiyama, Makoto Matsushima, Tadayoshi Ueda
-
Patent number: 6427049Abstract: In an electronic still camera, image data obtained by a camera image pickup section are transmitted to an image data compression/extension circuit and are coded by this circuit. The coded image data are recorded to a FIFO circuit. The image data are then DMA-transferred to a memory card by a DMA controller within a memory card interface (I/F) and are recorded to the memory card. When the image data are regenerated, the image data are DMA-transferred in a reverse direction. In another camera, image data are outputted from a charge coupled device (CCD) and are converted to a digital signal. Sound data are outputted from a microphone and are converted to a digital signal. File header information is constructed by the image and sound data and is stored to a RAM of a memory card interface in advance. The file header information is recorded to a memory card by a direct memory access (DMA) control section.Type: GrantFiled: February 23, 2001Date of Patent: July 30, 2002Assignee: Ricoh Company, Ltd.Inventors: Hiroki Fukuoka, Katsuhiko Manabe
-
Patent number: 6334027Abstract: An electronic still camera which photographs an object and outputs image data. An image data coding device codes the image data. The coded image data is recorded to a recording medium. Sound data can also be converted to an electric signal and the sound data can be coded, converted to an electric signal, and then recorded to the recording media. A rearrangeable unused region of the recording media can be used as a work area for a file control work.Type: GrantFiled: November 28, 2000Date of Patent: December 25, 2001Assignee: Ricoh Company, Ltd.Inventors: Hiroki Fukuoka, Katsuhiko Manabe
-
Publication number: 20010017979Abstract: In an electronic still camera, image data obtained by a camera image pickup section are transmitted to an image data compression/extension circuit and are coded by this circuit. The coded image data are recorded to a FIFO circuit. The image data are then DMA-transferred to a memory card by a DMA controller within a memory card interface (I/F) and are recorded to the memory card. When the image data are regenerated, the image data are DMA-transferred in a reverse direction. In another camera, image data are outputted from a charge coupled device (CCD) and are converted to a digital signal. Sound data are outputted from a microphone and are converted to a digital signal. File header information is constructed by the image and sound data and is stored to a RAM of a memory card interface in advance. The file header information is recorded to a memory card by a direct memory access (DMA) control section.Type: ApplicationFiled: February 23, 2001Publication date: August 30, 2001Applicant: RICOH COMPANY, LTD.Inventors: Hiroki Fukuoka, Katsuhiko Manabe
-
Patent number: 6212331Abstract: In an electronic still camera, image data obtained by a camera image pickup section are transmitted to an image data compression/extension circuit and are coded by this circuit. The coded image data are recorded to a FIFO circuit. The image data are then DMA-transferred to a memory card by a DMA controller within a memory card interface (I/F) and are recorded to the memory card. When the image data are regenerated, the image data are DMA-transferred in a reverse direction. In another camera, image data are outputted from a charge coupled device (CCD) and are converted to a digital signal. Sound data are outputted from a microphone and are converted to a digital signal. File header information is constructed by the image and sound data and is stored to a RAM of a memory card interface in advance. The file header information is recorded to a memory card by a direct memory access (DMA) control section.Type: GrantFiled: June 16, 1999Date of Patent: April 3, 2001Assignee: Ricoh Company, Ltd.Inventors: Hiroki Fukuoka, Katsuhiko Manabe
-
Patent number: 5960155Abstract: In an electronic still camera, image data obtained by a camera image pickup section are transmitted to an image data compression/extension circuit and are coded by this circuit. The coded image data are recorded to a FIFO circuit. The image data are then DMA-transferred to a memory card by a DMA controller within a memory card interface (I/F) and are recorded to the memory card. When the image data are regenerated, the image data are DMA-transferred in a reverse direction.Type: GrantFiled: January 22, 1998Date of Patent: September 28, 1999Assignee: Ricoh Company, Ltd.Inventors: Hiroki Fukuoka, Katsuhiko Manabe
-
Patent number: 5859666Abstract: A digital still video camera including a camera processor which processes image data of a subject, a recording processor which generates recording data based on the processed image data, a recording controller which controls recording of the recording data to a recording medium, a memory which stores image data processed by the camera processor and recording data recorded in the recording medium, a control device which controls the camera processor, the recording processor, and the recording controller, and an evacuating/writing device which interrupts control by the control device and evacuates/writes the recorded recording data between the recording medium and the memory.Type: GrantFiled: June 19, 1996Date of Patent: January 12, 1999Assignee: Ricoh Company, Ltd.Inventor: Katsuhiko Manabe