1. Note that both the l.e.d. and phototransistor are very directional - the tops are the sensitive surfaces.

2. The conventional phototransistor and photodiode are discussed first.

3. Optocoupler, Phototransistor Output, With Base Connection.

4. The phototransistor and the light emitting diode are arranged on the end cover along a radical direction to form a measurement head.

5. Phototransistor. Collector-emitter voltage 30 V. Emitter-collector voltage 6 V. Collector current 20 mA. Power dissipation 100 mW.

6. Phototransistor. Collector emitter voltage 30 V. Emitter collector voltage 5 V. Power dissipation 75 mW.

7. The phototransistor was installed through holes in the top of the case, and enclosed in a brass tube that was painted black inside and out.

8. We find that the conventional phototransistor has a good responsivity but lower speed performance.

9. The necessity of setting the bias current and segregation resistances in every element of bipolar silicon photo-negative resistance phototransistor array is studied and analysed.

10. The Design project with the main use of AD590 and phototransistor as a test unit has still used the MC14433, 74LS160,[http://] such as integrated device.

11. Optically triggered MOS gated solid state relay is a new switching device, which is composed of an MOS gated thyristor, a phototransistor, an enhanced mode MOSFET and a Zener diode.

12. Such MSM structure can also be formed into a transverse phototransistor with its common-emitter current gain from 2 to'4.

13. The physical fundamentals of the injecting photosensitive device, the basic configuration and characteristics of the injecting phototransistor have been introduced.

14. In this paper, a high-sensitivity lightwave communication system is set up by using a mini-power near-infrared LED as a light emitter, a phototransistor as a photoelectric receiver.

15. Reflection of a beam of light on the diaphragm falls on a phototransistor.