Patents Assigned to Astex Co., Ltd.
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Patent number: 5117118Abstract: A photoelectric switch is adapted for us as either a transmission type or a reflection type switch. To provide an integrated circuit for the photoelectric switch and to minimize input/output pins, multiple functions are assigned to each input/output pin. Such functions are provided via first to fourth integrated circuit input/output pins, i.e., the first pin serves functions in the supply of a detection output and a self-diagnosing output; the second pin supports a circuit for driving a projection type LED and a circuit for turning the LED off; the third pin supports a circuit for reversing a stable indication output and an operation indicating output; and the fourth pin supports a circuit for amplifying a received photo-signal and for controlling the mode of combination of photoelectric signals from a pair of photo-diodes.Type: GrantFiled: October 13, 1989Date of Patent: May 26, 1992Assignees: Astex Co., Ltd., Takenaka Electronic Industrial Co., Ltd.Inventor: Toshifumi Fukuyama
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Patent number: 5059809Abstract: A photoelectric switch is adapted for use as either a transmission type or a reflection type switch. To provide an integrated circuit for the photoelectric switch and to minimize input/output pins, multiple functions are assigned to each input/output pin. Such functions are provided via first to fourth integrated circuit input/output pins, i.e., the first pin serves functions in the supply of a detection output and a self-diagnosing output; the second pin supports a circuit for driving a projection type LED and a circuit for turning the LED off; the third pin supports a circuit for reversing a stable indication output and an operation indicating output; and the fourth pin supports a circuit for amplifying a received photo-signal and for controlling the mode of combination of photoelectric signals from a pair of photo-diodes.Type: GrantFiled: July 11, 1990Date of Patent: October 22, 1991Assignees: Astex Co., Ltd., Takenaka Electronic Industrial Co., Ltd.Inventor: Toshifumi Fukuyama
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Patent number: 5059782Abstract: A photoelectric switch is adapted for use as either a transmission type or a reflection type switch. To provide an integrated circuit for the photoelectric switch and to minimize input/output pins, multiple functions are assigned to each input/output pin. Such functions are provided via first to fourth integrated circuit input/output pins, i.e., the first pin serves functions in the supply of a detection output and a self diagnosing output; the second pin supports a circuit for driving a projection type LED and a circuit for turning the LED off; the third pin supports a circuit for reversing a stable indication output and an operation indicating output; and the fourth pin supports a circuit for amplifying a received photo-signal and for controlling the mode of combination of photoelectric signals from a pair of photo-diodes.Type: GrantFiled: July 11, 1990Date of Patent: October 22, 1991Assignees: Astex Co., Ltd., Takenaka Electronic Ind. Co. Ltd.Inventor: Toshifumi Fukuyama
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Patent number: 5057683Abstract: An error preventive circuit for a photoelectric switch is formed of a logic circuit, and it is highly responsive, while preventing erroneous operations caused by noises, eliminates the need of capacitors, and is suitable for circuit integration. The circuit validates the incoming light reception pulse only when its base-of-N counter has advanced to N counts, and, if the light reception pulse deviates in time by a certain value in the range of synchronism, a base-of-M counter is preset so that the timing of light reception is re-established at the center of the allowable range of synchronism.Type: GrantFiled: October 13, 1989Date of Patent: October 15, 1991Assignees: Astex Co., Ltd., Takenaka Electronic Industrial Co., Ltd.Inventor: Toshifumi Fukuyama
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Patent number: 5034601Abstract: A photoelectric switch is adapted for use as either a transmission type or a reflection type switch. To provide an integrated circuit for the photoelectric switch and to minimize input/output pins, multiple functions are assigned to each input/output pin. Such functions are provided via first to fourth integrated circuit input/output pins, i.e., the first pin serves functions in the supply of a detection output and a self-diagnosing output; the second pin supports a circuit for driving a projection type LED and a circuit for turning the LED off; the third pin supports a circuit for reversing a stable indication output and an operation indicating output; and the fourth pin supports a circuit for amplifying a received photo-signal and for controlling the mode of combination of photoelectric signals from a pair of photo-diodes.Type: GrantFiled: July 11, 1990Date of Patent: July 23, 1991Assignees: Astex Co., Ltd., Takenaka Electronic Ind. Co., Ltd.Inventor: Toshifumi Fukuyama
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Detection output circuit for a photoelectric switch integrated circuit with reduced interconnections
Patent number: 5034600Abstract: A photoelectric switch is adapted for use as either a transmission type or a reflection type switch. To provide an integrated circuit for the photoelectric switch and to minimize input/output pins, multiple functions are assigned to each input/output pin. Such functions are provided via first to fourth integrated circuit input/output pins, i.e., the first pin serves functions in the supply of a detection output and a self-diagnosing output; the second pin supports a circuit for driving a projection type LED and a circuit for turning the LED off; the third pin supports a circuit for reversing a stable indication output and an operation indicating output; and the fourth pin supports a circuit for amplifying a received photo-signal and for controlling the mode of combination of photoelectric signals from a pair of photo-diodes.Type: GrantFiled: July 11, 1990Date of Patent: July 23, 1991Assignees: Astex Co., Ltd., Takenaka Electronic Ind. Co., Ltd.Inventor: Toshifumi Fukuyama -
Patent number: 5030822Abstract: A photoelectric switch is adapted for use as either a transmission type or a reflection type switch. To provide an integrated circuit for the photoelectric switch and to minimize input/output pins, multiple functions are assigned to each input/output pin. Such functions are provided via first to fourth integrated circuit input/output pins, i.e., the first pin serves functions in the supply of a detection output and a self-diagnosing output; the second pin supports a circuit for driving a projection type LED and a circuit for turning the LED off; the third pin supports a circuit for reversing a stable indication output and an operation indicating output; and the fourth pin supports a circuit for amplifying a received photo-signal and for controlling the mode of combination of photoelectric signals from a pair of photo-diodes.Type: GrantFiled: July 11, 1990Date of Patent: July 9, 1991Assignees: Astex Co., Ltd., Takenaka Electronic Industrial Co., Ltd.Inventor: Toshifumi Fukuyama
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Patent number: 5030821Abstract: A photoelectric switch is adapted for use as either a transmission type or a reflection type switch. To provide an integrated circuit for the photoelectric switch and to minimize input/output pins, multiple functions are assigned to each input/output pin. Such functions are provided via first to fourth integrated circuit input/output pins, i.e., the first pin serves functions in the supply of a detection output and a self-diagnosing output; the second pin supports a circuit for driving a projection type LED and a circuit for turning the LED off; the third pin supports a circuit for reversing a stable indication output and an operation indicating output; and the fourth pin supports a circuit for amplifying a received photo-signal and for controlling the mode of combination of photoelectric signals from a pair of photo-diodes.Type: GrantFiled: July 11, 1990Date of Patent: July 9, 1991Assignees: Astex Co., Ltd., Takenaka Electronic Ind. Co., Ltd.Inventor: Toshifumi Fukuyama