Optical receiving apparatus

Details Optical receiving apparatus Optical receiving apparatus

1996-12-31

1998-04-07

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359198, 250214A, H04B 1006

Patent

active

057371113

ABSTRACT:
An optical receiving apparatus is provided which is constructed to compensate for a rise in offset level attributable to low-frequency response of a light-receiving device. An offset detecting circuit detects a quantity of electricity indicative of an offset current quantity which corresponds to the zero level of an optical signal within the current quantity output from the light-receiving device, and a current subtracting circuit reproduces the offset current quantity based on the detected quantity of electricity, subtracts the reproduced offset current quantity from the current quantity output from the light-receiving device, and supplies the result to a preamplifier.

REFERENCES:
patent: 5371763 (1994-12-01), Ota et al.
patent: 5430766 (1995-07-01), Ota et al.
patent: 5532471 (1996-07-01), Khorramabadi et al.

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