Signal detection circuit and signal detection method, and state detection circuit
AssigneeFujitsu Component Limited
InventorMasaki Noguchi
Life of this patent
Estimating the term…
Abstract
A signal detection circuit comprises: a driving power source that drives a photosensor and applies a voltage to a mechanical switch, wherein the photosensor has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from this light-emitting device, and the mechanical switch is connected in parallel between a power supply terminal of the photosensor and a signal output terminal of the photosensor and switchable between on and off states; and a detection means that is connected to the signal output terminal of the photosensor and that detects an electric signal output by the photosensor and an electric signal indicating the on/off state of the mechanical switch.
Claims13
A state detection circuit comprising:
- a photosensor that has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device;
- a mechanical switch that is connected in parallel between a power supply terminal of said photosensor and a signal output terminal of said photosensor and that is switchable between on and off states;
- a driving power source that drives said photosensor and applied a voltage to said mechanical switch;
- and
- a detection means that is connected with said signal output terminal of said photosensor and that detects an electric signal output by said photosensor and an electric signal indicating the on/off state of said mechanical switch.
A state detection circuit comprising:
- a photosensor that has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device;
- a mechanical switch that is connected in parallel between a power supply terminal of said photosensor and a terminal of said light-emitting device at the side opposite to said power supply terminal in said photosensor;
- a driving power source that drives said photosensor and applied a voltage to said mechanical switch;
- and
- a detection means that is connected to said signal output terminal of said photosensor and that detects an electric signal output by said photosensor.
A signal detection circuit comprising:
- a driving power source that drives a photosensor and applies a voltage to a mechanical switch, wherein said photosensor has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device, and said mechanical switch is connected in parallel between a power supply terminal of said photosensor and a signal output terminal of said photosensor and switchable between on and off states;
- and
- a detection means that is connected to the signal output terminal of the photosensor and that detects an electric signal output by the photosensor and an electric signal indicating the on/off state of the mechanical switch.
A signal detection circuit comprising:
- a first connector pin that is connected to a power supply terminal of a photosensor and one terminal of a mechanical switch, wherein said photosensor has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device, and said mechanical switch is switchable between on and off states;
- a second connector pin that is connected to a signal output terminal of said photosensor and the other terminal of the mechanical switch;
- a driving power source that is connected to said first connector pin and that drives said photosensor and applies a voltage to said mechanical switch;
- and
- a detection means that is connected to said second connector pin and that detects an electric signal output by the photosensor and an electric signal indicating the on/off state of the mechanical switch.
A signal detection circuit for detecting an electric signal output by a photosensor and an electric signal indicating an on/off state of a mechanical switch, wherein said photosensor has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device, and said mechanical switch is switchable between the on and off states, comprises:
- a driving power source that drives said photosensor and applies a voltage to said mechanical switch that is connected in parallel between a power supply terminal of said photosensor and a terminal of said light-emitting device at the side opposite to said power supply terminal in said photosensor;
- and
- a detection means that is connected to a signal output terminal of said photosensor and that detects the electric signal output by said photosensor.
A signal detection circuit for detecting an electric signal output by a photosensor and an electric signal indicating an on/off state of a mechanical switch, wherein said photosensor has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device, and said mechanical switch is switchable between the on and off states, comprises:
- a first connector pin that is connected with a power supply terminal of said photosensor and one terminal of said mechanical switch, wherein said mechanical switch is connected in parallel between said power supply terminal of said photosensor and a terminal of said light-emitting device at the side opposite to said power supply terminal in said photosensor;
- a second connector pin that is connected to a signal output terminal of said photosensor;
- a driving power source that is connected to said first connector pin and that drives said photosensor and applies a voltage to said mechanical switch;
- and
- a detection means that is connected to said second connector pin and that detects the electric signal output by the photosensor.
A signal detection method comprising the steps of:
- supplying electric power, through a power supply terminal, to a photosensor and a mechanical switch, wherein said photosensor has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device, and said mechanical switch is connected in parallel between said power supply terminal of said photosensor and a signal output terminal of said photosensor and switchable between on and off states;
- and
- detecting, through said signal output terminal of said photosensor, an electric signal output by said photosensor and an electric signal indicating the on/off state of said mechanical switch.
A signal detection method for detecting an electric signal output by a photosensor and an electric signal indicating an on/off state of a mechanical switch, wherein said photosensor has a light-emitting device, and a light-receiving device to output an electric signal corresponding to an amount of light received from such light-emitting device, and said mechanical switch is switchable between the on and off states, the method comprising the steps of:
- supplying electric power, through a power supply terminal, to a photosensor and a mechanical switch, wherein said mechanical switch is connected in parallel between said power supply terminal of said photosensor and the terminal of said light-emitting device at the side opposite to said power supply terminal in said photosensor;
- and
- detecting, through a signal output terminal of said photosensor, the electric signal output by said photosensor.
Dependencies are inferred from the claim text.