Patents by Inventor Yuichiro Yamashita

Yuichiro Yamashita 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).

  • Publication number: 20020036257
    Abstract: The present invention provides an image pickup apparatus which comprises: first and second photoelectric conversion units each including a plurality of photoelectric conversion elements; an image forming unit that forms images viewed from different points on the plurality of photoelectric conversion elements included in each of the first and second photoelectric conversion units; a first holding unit for holding signals from the first photoelectric conversion unit, the first holding unit having at least the same number of capacitors as the number of the photoelectric conversion elements included in the first photoelectric conversion unit; a second holding unit for holding signals from the second photoelectric conversion unit, the second holding unit having at least the same number of capacitors as the number of the photoelectric conversion elements included in the second photoelectric conversion unit; wherein a first common output line to which signals are read out from the plurality of capacitors included in
    Type: Application
    Filed: August 24, 2001
    Publication date: March 28, 2002
    Inventors: Yuichiro Yamashita, Tetsuya Itano
  • Publication number: 20010020909
    Abstract: A signal processing apparatus having: a plurality of circuit blocks each circuit block including a signal source and an output transistor adapted to receive a signal generated by the signal source at a control electrode region and output a corresponding signal from a main electrode region; and an analog/digital converter circuit adapted to sequentially process the signal from each of the plurality of circuit blocks, wherein the analog/digital converter circuit includes a reference transistor for receiving a reference level at a control electrode region and outputting a corresponding signal from a main electrode region and a digital output circuit for outputting a digital signal in accordance with a signal output from the output transistor and a signal output from the reference transistor, and wherein the output transistor and reference transistor constitute an input unit of a differential amplifier circuit including the output transistor and reference transistor.
    Type: Application
    Filed: February 13, 2001
    Publication date: September 13, 2001
    Inventors: Takamasa Sakuragi, Seiji Hashimoto, Yuichiro Yamashita
  • Patent number: 6184511
    Abstract: A photoelectric conversion apparatus including (A) a semiconductor integrated circuit, for photoelectrically converting an incident optical signal, that includes a first temperature dependent element having a characteristic which exhibits a predetermined change in accordance with a change in temperature and a detection circuit for detecting temperature information, (B) a device arranged outside of the semiconductor integrated circuit, and (C) at least one second temperature dependent element which is arranged inside the device and has a characteristic which exhibits a predetermined change in accordance with a change in temperature. The detection circuit detects temperature information of the first temperature dependent element and temperature information of the at least one second temperature dependent element.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: February 6, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichiro Yamashita
  • Patent number: 6011714
    Abstract: A semiconductor circuit assembly is capable of accurately storing a plurality of analog or multi-valued data using circuitry having a small surface area. The circuit assembly includes a first circuit provided in the form of a target memory cell device comprising memory cells which conduct the writing and storage of analog signals. The first circuit has output terminals for outputting stored values to the exterior as voltage signals. Mechanisms supply at least two index voltages. A second circuit performs the function of halting the writing of the analog signals when the output signal at the first circuit output terminals reaches a value representing a desired voltage plus the difference between the two index voltages.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: January 4, 2000
    Assignees: Tadashi Shibata, Tadahiro Ohmi
    Inventors: Tadashi Shibata, Tadahiro Ohmi, Yuichiro Yamashita
  • Patent number: 5973960
    Abstract: A nonvolatile semiconductor memory which is capable of a high degree of integration and can conduct the writing of analog data at high speed and with a high degree of accuracy.The memory device comprises two or more semiconductor devices comprising a first MOS transistor having a first floating gate which is electrically insulated, a first electrode which is capacitively coupled with the first floating gate, a second electrode provided with the first floating gate via a tunnel junction, and a third electrode connected to the second electrode via a switch; the present invention is further provided with a fourth electrode connected commonly with the third electrodes of the semiconductor devices, a fifth electrode connected commonly with the source electrodes of the first MOS transistors, a sixth electrode which is capacitively coupled with the fourth electrode, and a seventh electrode which is connected with the fourth electrode via a switch.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: October 26, 1999
    Assignee: Tadahiro OHMI and Tadashi Shibata
    Inventors: Tadashi Shibata, Tadahiro Ohmi, Yuichiro Yamashita
  • Patent number: 5745416
    Abstract: A non-volatile semiconductor memory which is capable of high speed and highly accurate analog data writing. The memory includes a first MOS type transistor having a first floating gate which is electrically isolated. A first electrode is capacitively coupled with the first floating gate. A second electrode is connected via a tunnel junction with the first floating gate. A third electrode is capacitively coupled with the second electrode. A second MOS type transistor interconnects the first and second electrodes. A means is provided for applying a predetermined potential difference between the first and third electrodes to thereby cause a tunnel current to flow in the tunnel junction and to store an electric charge in the first floating gate to thereby cause the second MOS type transistor to conduct when the electric charge has reached a predetermined value.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: April 28, 1998
    Assignees: Tadashi Shibata, Tadahiro Ohmi
    Inventors: Tadashi Shibata, Tadahiro Ohmi, Yuichiro Yamashita