Patent ID: 6333805
Filing Date: 2001-12-25
Classification: G01J,H04B,H04J

Abstract:
An optical output control circuit comprising:a level varying means for varying input level of a light signal;a monitoring means for monitoring output level of the light signal;a variable quantity control means for controlling variable quantity of said level varying means in accordance with a monitor signal from said monitoring means;an A-D conversion means for generating a digital signal while digital converting the monitor signal;a table to which a data is set, such the data enabling variable quantity corresponding to desired value of the output level of the light signal to be determined from said digital signal; anda data processing means retrieving said table on the basis of the digital signal outputted from said A-D conversion means, before determining variable quantity in order to harmonize output level of the light signal with the desired value to supply to said variable quantity control means.