Predistortion circuit with combined odd-order and even-order...

Details Predistortion circuit with combined odd-order and even-order... Predistortion circuit with combined odd-order and even-order...

2005-07-12

2005-07-12

Negash, Kinfe-Michael (Department: 2633)

Optical communications

Transmitter

Including compensation

C398S194000, C398S159000, C375S296000, C330S149000

Reexamination Certificate

active

06917764

ABSTRACT:
An apparatus and associated method for generating predistortion IMD in a predistortion circuit. The method comprising adjusting the bias voltage, adjusting the bias current; adjusting the gain of the amplifier; and adjusting the differential bias current flowing through each diode in an antiparallel diode pair. In one aspect, the bias voltage, the bias current, the gain of the amplifier, and the differential bias current can be iteratively adjusted to generate both even-order and odd-order predistortion IMD.

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Nazarathy et al. “Progress in Externally Modulated AM CATV Transmission Systems” Journal of Lightwave Technology, vol. 11, No. 1,pp. 82-105, Jan. 1993.
Wilson et al. “Predistortion of Electroabsorption Modulators for Analog CATV Systems at 1.55μm” Journal of Lightwave Technology, vol. 15, No. 9, pp. 1654-1661, Sep. 1997.

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