Patent ID: 11885674
Assignee: HONEYWELL INTERNATIONAL INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A phototransistor apparatus, comprising:
a phototransistor;
a light source; and
a supply voltage electrically connected to the phototransistor, wherein the phototransistor, the light source and the supply voltage are implemented in a gas meter, wherein after switching on the supply voltage, the phototransistor generates a phototransistor signal that is scanned, wherein the light source is switched off before the phototransistor signal is scanned, and wherein charge carriers in a base area of the phototransistor are reactive to a light pulse from the light source in a currentless state, and continue to react after the light source is switched off, and wherein the supply voltage is switched on when the light source is already switched off.