| 摘要 |
<p>PURPOSE:To improve performance by adding another photocoupler for parallelly connecting the light emitting element of a photocoupler and another photodetector on the input side and for serially connecting the light receiving element of the photocoupler and another light emitting element on the output side. CONSTITUTION:A circuit is formed equivalently with a third photocoupler 7 for which an LED 1a and a phototransistor Tr 1b consisting of a first photocoupler 1 are combined with an LED 2a and a photo Tr 2b consisting of a second photocoupler 2. Then, the junction of the anode of the LED 2a and the collector of the photo Tr 1b can be regarded as an anode A of the third photocoupler 7, and the junction of the cathode of the LED 2a and the emitter of the photo Tr 1b can be regarded as a cathode K of the third photocoupler 7. Similarly, the anode of the LED 1a can be regarded as a collector C of the third coupler 7, and the emitter of the Tr 2b can be regarded as an emitter E of the third coupler 7.</p> |
