Optical waveguides – Miscellaneous
Reexamination Certificate
2005-11-15
2005-11-15
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
Miscellaneous
C372S026000, C372S032000, C372S038070, C330S295000, C330S311000
Reexamination Certificate
active
06965722
ABSTRACT:
An optical transmitter and/or a constituent electro-optic transducer driver that performs active matching. The transducer driver performs active matching using a voltage step down through one base-emitter bipolar transistor, followed by a step up approach through the base-emitter of another bipolar transistor, thereby allowing for lower supply voltages. Furthermore, the voltage drop across the source resistor is minimal by using an operation amplifier in a feedback configuration, thereby further encouraging operability with low supply voltages. The electro-optic transducer driver is also beneficial in that it has high AC-coupling efficiency of the modulation current to the electro-optic transducer, may operate at high speeds with reduced jitter.
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Finisar Corporation
Ullah Akm Enayet
Workman Nydegger
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