Photoelectric switching apparatus
First Claim
1. A photoelectric switching apparatus comprising:
- a light transmitter part comprising a first built in oscillator and a detachable light transmitter circuit which is driven by said first oscillator when said light transmitter is connected to said first oscillator and a detachable light emitter for emitting light in response to signal received from said light transmitter circuit,a light receiver part comprising at least a photoelectric transducer for converting a light signal incident thereon to a converted electric signal and a signal processing part for processing the signal based on said converted electric signal,an auxiliary part for controlling operation of said light transmitter part and said light receiver part,a second oscillator which is separate from said light transmitter part and can be connected to said light transmitter circuit when said light transmitter circuit and said light emitter together are detached from said first oscillator,said signal processing circuit comprising a d-flip-flop which reads input data based on said converted electric signal by utilizing an output signal of said first oscillator as its clock pulse, received through a switchable inverter,said first oscillator issuing an output signal which is substantially synchronous with said converted electric signal to said d-flip-flop by utilizing a signal based on said converted electric signal when said light transmitter circuit and said light emitter are detached from said first oscillator, andsaid first oscillator issuing an output signal which drives said light transmitter circuit, to said d-flip-flop when said light transmitter is connected to said first oscillator.
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Accused Products
Abstract
A photoelectric switching apparatus includes a light transmitter part having a first built in oscillator and a detachable light transmitter circuit driven by the first oscillator. A detachable light emitter is provided for emitting light in response to a signal from the light transmitter circuit. A light receiver part includes a photoelectric transducer for converting a light signal incident thereon to a converted electric signal and a second oscillator which is separate from the light transmitter part and can be connected to the light transmitter circuit when the light transmitter circuit and the light emitter together are detached from the first oscillator. The light receiver part has a D-flip-flop which reads input data based on the converted electric signal by utilizing an output signal of the first oscillator as its clock pulse. The first oscillator issues an output signal which is substantially synchronous with the converted electric signal to the D-flip-flop by utilizing a signal based on the converted electric signal when the light transmitter circuit and the light emitter are detached from the first oscillator. The first oscillator issues an output signal which drives the light transmitter circuit, to the D-flip-flop when the light transmitter is connected to the first oscillator.
28 Citations
6 Claims
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1. A photoelectric switching apparatus comprising:
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a light transmitter part comprising a first built in oscillator and a detachable light transmitter circuit which is driven by said first oscillator when said light transmitter is connected to said first oscillator and a detachable light emitter for emitting light in response to signal received from said light transmitter circuit, a light receiver part comprising at least a photoelectric transducer for converting a light signal incident thereon to a converted electric signal and a signal processing part for processing the signal based on said converted electric signal, an auxiliary part for controlling operation of said light transmitter part and said light receiver part, a second oscillator which is separate from said light transmitter part and can be connected to said light transmitter circuit when said light transmitter circuit and said light emitter together are detached from said first oscillator, said signal processing circuit comprising a d-flip-flop which reads input data based on said converted electric signal by utilizing an output signal of said first oscillator as its clock pulse, received through a switchable inverter, said first oscillator issuing an output signal which is substantially synchronous with said converted electric signal to said d-flip-flop by utilizing a signal based on said converted electric signal when said light transmitter circuit and said light emitter are detached from said first oscillator, and said first oscillator issuing an output signal which drives said light transmitter circuit, to said d-flip-flop when said light transmitter is connected to said first oscillator. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification