Patents by Inventor Makio Abe

Makio Abe 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: 20200106379
    Abstract: A motor control circuit includes a control circuit configured to output a pulse width modulation signal for controlling a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor, and includes a speed-change detecting circuit configured to detect a change in a speed command signal and, output, in response to the change meeting and exceeding a predetermined limit, a signal indicating that the speed command signal has changed to the control circuit to cause the control circuit to change a duty cycle of the pulse width modulation signal, the speed command signal specifying a target value of a rotational speed of the motor.
    Type: Application
    Filed: September 20, 2019
    Publication date: April 2, 2020
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Makio ABE, Shu HAYASHI, Masato AOKI
  • Publication number: 20200106381
    Abstract: A motor control circuit includes a control circuit configured to control a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor, and includes a determination-information generating circuit configured to generate at least one determination value that conveys information on whether the motor malfunctions or deteriorates. The motor control circuit includes a determination circuit configured to determine whether the motor malfunctions or deteriorates based on the determination value to output, as an interrupt signal, a signal indicating that the motor malfunctions or deteriorates to the control circuit.
    Type: Application
    Filed: September 20, 2019
    Publication date: April 2, 2020
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Makio ABE, Takatoshi ITAGAKI, Shu HAYASHI, Masato AOKI
  • Patent number: 9274583
    Abstract: A semiconductor integrated circuit includes a central processing unit 21 the operation of which is stopped or slowed down in a sleep mode; an edge detection unit 23 detecting an edge of an interrupt signal supplied from the outside and generating an edge detection signal; and a data holding unit 22 holding data supplied from the outside when the edge detection signal is received. The central processing unit 21 reads the data held by the data holding unit 22 after returning from the sleep mode to an active mode in response to the interrupt signal.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: March 1, 2016
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Makio Abe
  • Patent number: 8842793
    Abstract: A communication circuit includes a sampling clock generating circuit generating a sampling clock signal having a frequency that is “m” times greater than a bit rate of the communication data and containing “n” pulses in each bit period of the communication data; and a sampling circuit sampling the communication data based on the sampling clock signal to obtain “n” sets of received data in each bit period of the communication data. The sampling clock generating circuit delays the sampling clock signal when a first one or more of the “n” sets of received data are different from a value of the rest of the “n” sets of received data, and advances the sampling clock signal when a value of a last one or more of the “n” sets of received data is different from a value of the rest of the “n” sets of received data.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: September 23, 2014
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Makio Abe
  • Patent number: 8712709
    Abstract: A delta-sigma AD converter circuit includes a plurality of registers to store plural data obtained by dividing data stored in the shift register and to hold the plural data in such a form that each of the plural data is readable independently of the others, wherein one or more of the plurality of registers store the pulse density modulated data stored in the shift register in response to the register store instruction signal, and the filtering unit reads the pulse density modulated data from one or more of the plurality of registers responsive to the mode in response to the read request signal.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: April 29, 2014
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Makio Abe
  • Patent number: 8669820
    Abstract: An oscillator circuit includes a clock oscillator which outputs a main clock signal having an oscillating frequency switched between a high frequency and a low frequency in response to a frequency selection signal, and a frequency divider circuit which outputs a sub-clock signal having a divided frequency equivalent to a frequency division ratio of the oscillating frequency of the main clock signal, the frequency division ratio being switched in response to the frequency selection signal. The divided frequency of the sub-clock signal is predetermined for each of the high frequency and the low frequency to which the oscillating frequency is switched in response to the frequency selection signal.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: March 11, 2014
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Makio Abe, Fumihiro Inoue, Junichi Kimura
  • Patent number: 8658300
    Abstract: A fuel gauge circuit detects a residual quantity of a battery 1 and is disposed on a substrate 20 together with a protection circuit 40 which protects charging/discharging of the battery 1. The fuel gauge circuit includes a voltage monitor terminal T1 disposed on a side facing a positive power-supply terminal 21 of the substrate and connected to each of the positive power-supply terminal 21 and a voltage sensor 31 disposed in the circuit, a voltage through terminal T6 disposed on a side facing the protection circuit, opposite to the side facing the positive power-supply terminal 21, and connected to a voltage monitor terminal T11 of the protection circuit, and a wiring 32 disposed within the circuit to connect the voltage monitor terminal T1 of the fuel gauge circuit to the voltage through terminal T11.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: February 25, 2014
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takatoshi Itagaki, Akira Ikeuchi, Makio Abe
  • Publication number: 20120177160
    Abstract: A communication circuit includes a sampling clock generating circuit generating a sampling clock signal having a frequency that is “m” times greater than a bit rate of the communication data and containing “n” pulses in each bit period of the communication data; and a sampling circuit sampling the communication data based on the sampling clock signal to obtain “n” sets of received data in each bit period of the communication data. The sampling clock generating circuit delays the sampling clock signal when a first one or more of the “n” sets of received data are different from a value of the rest of the “n” sets of received data, and advances the sampling clock signal when a value of a last one or more of the “n” sets of received data is different from a value of the rest of the “n” sets of received data.
    Type: Application
    Filed: December 27, 2011
    Publication date: July 12, 2012
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Makio ABE
  • Publication number: 20120176204
    Abstract: An oscillator circuit includes a clock oscillator which outputs a main clock signal having an oscillating frequency switched between a high frequency and a low frequency in response to a frequency selection signal, and a frequency divider circuit which outputs a sub-clock signal having a divided frequency equivalent to a frequency division ratio of the oscillating frequency of the main clock signal, the frequency division ratio being switched in response to the frequency selection signal. The divided frequency of the sub-clock signal is predetermined for each of the high frequency and the low frequency to which the oscillating frequency is switched in response to the frequency selection signal.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 12, 2012
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Makio Abe, Fumihiro Inoue, Junichi Kimura
  • Publication number: 20120137053
    Abstract: A microprocessor to be connected with an external device is disclosed. The microprocessor includes a non-rewritable memory including a first interrupt vector table storing addresses of plural programs that allow plural types of interrupts, and an area storing a processing program in an address indicated by each of vectors in the first interrupt vector table; a rewritable non-volatile memory including a second interrupt vector table that includes contents identical to contents of the first interrupt vector table; an address changing section that conducts address change from an address for accessing the first interrupt vector table to another address for accessing the second interrupt vector table; a writing section that writes an address of an arbitrary vector of the second interrupt vector table and a processing program stored in the address indicated by the arbitrary vector in the rewritable non-volatile memory upon instruction supplied from the external device.
    Type: Application
    Filed: November 21, 2011
    Publication date: May 31, 2012
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoshihide MAJIMA, Makio ABE
  • Publication number: 20110274952
    Abstract: A fuel gauge circuit detects a residual quantity of a battery 1 and is disposed on a substrate 20 together with a protection circuit 40 which protects charging/discharging of the battery 1. The fuel gauge circuit includes a voltage monitor terminal T1 disposed on a side facing a positive power-supply terminal 21 of the substrate and connected to each of the positive power-supply terminal 21 and a voltage sensor 31 disposed in the circuit, a voltage through terminal T6 disposed on a side facing the protection circuit, opposite to the side facing the positive power-supply terminal 21, and connected to a voltage monitor terminal T11 of the protection circuit, and a wiring 32 disposed within the circuit to connect the voltage monitor terminal T1 of the fuel gauge circuit to the voltage through terminal T11.
    Type: Application
    Filed: January 12, 2010
    Publication date: November 10, 2011
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takatoshi Itagaki, Akira Ikeuchi, Makio Abe
  • Publication number: 20110270552
    Abstract: A delta-sigma AD converter circuit includes a modulation unit to produce pulse density modulated data by pulse density modulation of an analog signal, and a filtering unit to convert the pulse density modulated data into pulse code modulated data, wherein the modulation unit includes a shift register to store and shift the pulse density modulated data in synchronization with a clock, a counter to generate a register store instruction signal and a read request signal upon a count value reaching a predetermined value responsive to a mode, the count value being a count of a number of shifts of the shift register, and a plurality of registers to store plural data obtained by dividing data stored in the shift register and to hold the plural data in such a form that each of the plural data is readable independently of the others, wherein one or more of the plurality of registers store the pulse density modulated data stored in the shift register in response to the register store instruction signal, and the filterin
    Type: Application
    Filed: January 12, 2010
    Publication date: November 3, 2011
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Makio Abe
  • Publication number: 20110153241
    Abstract: A semiconductor integrated circuit includes a central processing unit 21 the operation of which is stopped or slowed down in a sleep mode; an edge detection unit 23 detecting an edge of an interrupt signal supplied from the outside and generating an edge detection signal; and a data holding unit 22 holding data supplied from the outside when the edge detection signal is received. The central processing unit 21 reads the data held by the data holding unit 22 after returning from the sleep mode to an active mode in response to the interrupt signal.
    Type: Application
    Filed: August 26, 2009
    Publication date: June 23, 2011
    Applicant: Mitusmi Electric Co., Ltd.
    Inventor: Makio Abe
  • Patent number: 7576617
    Abstract: A semiconductor integrated circuit device is disclosed that includes a signal processing unit having a nonvolatile memory and a detection unit; plural oscillation sources outputting plural oscillation signals; a selection control unit that selects one of the oscillation signals output by the oscillation sources according to a selection signal, and controls a transfer timing for transferring circuit setting information from the nonvolatile memory to the detection unit and an operations start timing for starting signal processing operations of the signal processing unit according to the selected oscillation signal.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: August 18, 2009
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takatoshi Itagaki, Makio Abe
  • Publication number: 20090150101
    Abstract: A semiconductor integrated circuit device for calculating a remaining battery capacity of a battery from which the semiconductor integrated circuit device receives power supply, and reporting the calculated remaining battery capacity to a battery-using appliance which also receives power supply from the battery includes a clock generating unit configured to generate a first clock signal and a second clock signal having a higher frequency than a frequency of the first clock signal; a selecting unit configured to select one of the first clock signal and the second clock signal and output the selected clock signal; a calculating unit configured to operate according to the selected clock signal to calculate the remaining battery capacity; and a communicating unit configured to operate according to the selected clock to report the calculated remaining battery capacity to the battery-using appliance.
    Type: Application
    Filed: November 24, 2008
    Publication date: June 11, 2009
    Inventors: Takatoshi Itagaki, Makio Abe
  • Patent number: 7456675
    Abstract: A disclosed semiconductor integrated circuit device includes a selection circuit that is supplied with a first clock signal and a second clock signal, a selection signal, and a switching signal, and configured to select one of the first clock signal and the second clock signal according to the selection signal and to change the selected one of the first clock signal and the second clock signal to the other one of the first clock signal and the second clock signal according to the switching signal. The disclosed semiconductor integrated circuit device also includes an output fixing circuit configured to generate a pulse that is maintained at a high level or a low level during a certain period, to perform an OR operation on the output signal from the selection circuit and the generated pulse, and to output a result of the OR operation as the output clock signal.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: November 25, 2008
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Makio Abe
  • Publication number: 20070205830
    Abstract: A semiconductor integrated circuit device is disclosed that includes a signal processing unit having a nonvolatile memory and a detection unit; plural oscillation sources outputting plural oscillation signals; a selection control unit that selects one of the oscillation signals output by the oscillation sources according to a selection signal, and controls a transfer timing for transferring circuit setting information from the nonvolatile memory to the detection unit and an operations start timing for starting signal processing operations of the signal processing unit according to the selected oscillation signal.
    Type: Application
    Filed: February 13, 2007
    Publication date: September 6, 2007
    Inventors: Takatoshi Itagaki, Makio Abe
  • Publication number: 20070188212
    Abstract: A disclosed semiconductor integrated circuit device includes a selection circuit that is supplied with a first clock signal and a second clock signal, a selection signal, and a switching signal, and configured to select one of the first clock signal and the second clock signal according to the selection signal and to change the selected one of the first clock signal and the second clock signal to the other one of the first clock signal and the second clock signal according to the switching signal. The disclosed semiconductor integrated circuit device also includes an output fixing circuit configured to generate a pulse that is maintained at a high level or a low level during a certain period, to perform an OR operation on the output signal from the selection circuit and the generated pulse, and to output a result of the OR operation as the output clock signal.
    Type: Application
    Filed: February 12, 2007
    Publication date: August 16, 2007
    Inventor: Makio Abe
  • Patent number: 5558146
    Abstract: A number of parallel slats (3) of a blind (1) comprise transparent base boards (3a), and graphic pattern forming regions (16) are provided on the respective slats (3) by a paint or the like. When the slats (3) are simultaneously tilted at a predetermined angle, the graphic pattern forming regions (16) on the respective slats (3) are combined with each other to block the light coming from behind the blind (1) or reflect the light coming from behind from the side of the observer, thereby producing a significant graphic pattern (18) such as a portrait on a blind surface (17). The significant graphic pattern (18) can be recognized when the observer views the blind surface (17) or the shadow projected onto a wall or floor. The significant graphic pattern (18) creates an excellent interior atmosphere.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: September 24, 1996
    Inventor: Makio Abe