Driving circuit using probability density function

Details Driving circuit using probability density function Driving circuit using probability density function

2011-02-22

2011-02-22

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular component circuitry

Having feedback circuitry

C372S038020, C372S038070

Reexamination Certificate

active

07894497

ABSTRACT:
The present invention provides a laser diode driving circuit that enables to precisely control the amplitude of the driving current with suppressing the overshoot and the undershoot appeared in the monitor signal of the optical output from the laser diode. The driving circuit of the invention includes a signal mixer, a comparator, an averaging unit and a current generator. The signal mixer superposes an additional signal on the monitor signal. The amplitude of the additional signal varies in accordance with a preset distribution function. The comparator compares thus superposed signal with a reference level and outputs a binary signal. The averaging unit integrates this binary signal and the current generator provides the driving current based on the averaged binary signal.

REFERENCES:
patent: 6151344 (2000-11-01), Kiely et al.
patent: 06-164049 (1994-06-01), None
patent: 09-283848 (1997-10-01), None
patent: 2000-269897 (2000-09-01), None
patent: 2000-332344 (2000-11-01), None

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