Automatic zeroing circuit to compensate for dark currents or the

Details Automatic zeroing circuit to compensate for dark currents or the Automatic zeroing circuit to compensate for dark currents or the

1976-06-21

1978-03-21

Evans, F. L.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

250214C, G01J 350, H01J 3912

Patent

active

040800741

ABSTRACT:
An automatic zeroing circuit normalizes a detector-measuring apparatus to eliminate relatively steady-state DC errors that may develop in response to the temperature or other variable parameter dependency of leakage currents in a transducer, such as dark currents in a photosensitive transistor. Therefore, the outputs from such apparatus are generally insensitive to such variables and errors.

REFERENCES:
patent: 3684378 (1972-08-01), Lord
patent: 3861788 (1975-01-01), Webster

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