Infrared radiation receiving circuit, electronic device, and infrared radiation receiving method
First Claim
1. An infrared radiation receiving circuit that generates an output pulse by receiving an input pulse of infrared radiation, converting the input pulse into an electric signal, and amplifying the electric signal, comprising:
- a pulse generating section that generates the output pulse by turning an amplified signal amplified through an amplifier into a pulse by using a threshold value, and outputs the output pulse to an external entity; and
a suspending section for suspending the pulse generating section from generating the output pulse after the output pulse is outputted until a predetermined first time elapses.
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Abstract
A receiving circuit stops a one shot timer from generating an output signal immediately after the output signal is outputted to an external entity until a predetermined stretch time elapses. With this arrangement, the receiving circuit will not generate a new output signal even if (i) noises generated by a voltage fluctuation of the output signal appear on an amplified signal immediately after the output signal is outputted (at the end of the output), and (ii) the value of the amplified signal exceeds a threshold value. Therefore, the receiving circuit can make sure that an unnecessary output signal will not be generated due to the noises.
12 Citations
17 Claims
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1. An infrared radiation receiving circuit that generates an output pulse by receiving an input pulse of infrared radiation, converting the input pulse into an electric signal, and amplifying the electric signal, comprising:
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a pulse generating section that generates the output pulse by turning an amplified signal amplified through an amplifier into a pulse by using a threshold value, and outputs the output pulse to an external entity; and
a suspending section for suspending the pulse generating section from generating the output pulse after the output pulse is outputted until a predetermined first time elapses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An infrared radiation receiving circuit that generates an output pulse by receiving an input pulse of infrared radiation, converting the input pulse into an electric signal, and amplifying the electric signal, comprising:
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a pulse generating section that (i) generates a comparator pulse whose pulse width corresponds to a time during which an absolute value of the amplified signal exceeds the threshold value, (ii) generates the output pulse from the comparator pulse, and (iii) outputs the output pulse to an external entity; and
a suspending section for suspending the pulse generating section from generating the output pulse after the comparator pulse is outputted until a predetermined second time elapses. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An infrared radiation receiving method for generating an output pulse by receiving an input pulse of infrared radiation, converting the input pulse into an electric signal, and amplifying the electric signal, comprising:
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an output pulse generating step, in which the output pulse is generated by turning an amplified signal amplified through an amplifier into a pulse by using a threshold value, and the output pulse is outputted to an external entity; and
a suspending step, in which generation of the output pulse is suspended after the output pulse is outputted until a predetermined first time elapses.
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17. An infrared radiation receiving method for generating an output pulse by receiving an input pulse of infrared radiation, converting the input pulse into an electric signal, and amplifying the electric signal, comprising:
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a pulse generating step, in which (i) a comparator pulse whose pulse width corresponds to a time during which an absolute value of the amplified signal exceeds the threshold value is generated, (ii) the output pulse is generated from the comparator pulse, and (iii) the output pulse is outputted to an external entity; and
a suspending step, in which generation of the output pulse is suspended after the comparator pulse is outputted until a predetermined second time elapses.
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Specification