Signal converter for converting digital input signal to...

Details Signal converter for converting digital input signal to... Signal converter for converting digital input signal to...

2006-04-18

2006-04-18

Dong, Hung Xuan (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C341S137000

Reexamination Certificate

active

07031042

ABSTRACT:
A signal converter for converting a digital input signal to an optical modulation signal includes a pilot signal-superimposing circuit which superimposes a pilot signal on a bias control signal, a monitor circuit for providing a monitor signal by receiving a part of the optical modulation signal supplied from the optical modulator, a first feedback system for providing an amplitude control signal to control an amplitude of the digital input signal through a frequency deviation signal obtained from the monitor signal, and a second feedback system for providing the bias control the bias signal through a multiplying frequency deviation signal obtained from the monitor signal.

REFERENCES:
patent: 6539038 (2003-03-01), Wilkerson et al.
patent: 2642499 (1997-05-01), None

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