Method for controlling a bias voltage applied to an...

Details Method for controlling a bias voltage applied to an... Method for controlling a bias voltage applied to an...

2007-12-18

2007-12-18

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S208100, C250S214100

Reexamination Certificate

active

11305347

ABSTRACT:
The invention discloses an optical receiver that prevents the instability of the bias voltage to the avalanche photodiode (APD) and facilitates the recovery of the bias voltage from the safety value. The optical receiver comprises the APD, the DC-DC converter to supply the bias voltage to the APD, the current detector to detect the photo current generated by the APD, and the controller to set the bias voltage. The controller, evaluating the optical input power based on the output voltage of the DC-DC converter and the monitored current, sets the output voltage based on the change of the optical input power.

REFERENCES:
patent: 6031219 (2000-02-01), Shuke
patent: 6313459 (2001-11-01), Hoffe et al.
patent: 6707024 (2004-03-01), Miyamoto et al.
patent: 6852966 (2005-02-01), Douma et al.
patent: 2002/0020803 (2002-02-01), Suzuki et al.
patent: 08-186924 (1996-07-01), None
patent: 10-303820 (1998-11-01), None
patent: 10-308636 (1998-11-01), None

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