System and method for providing a fast turn on bias circuit...

Details System and method for providing a fast turn on bias circuit... System and method for providing a fast turn on bias circuit...

2007-03-06

2007-03-06

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Bipolar transistor

C326S031000, C326S033000, C326S115000, C326S126000

Reexamination Certificate

active

10973220

ABSTRACT:
A system and method is disclosed for providing a fast turn on bias circuit that permits a fast transition from an idle “power down” state to an active “power up” state in current mode logic (CML) transmitter output circuits. The invention comprises a capacitor coupled to a bias transistor and a charge switch circuit for controlling the operation of the capacitor. The capacitor has a value of capacitance that is equal in magnitude and opposite in sign to the Miller coupling capacitance in the bias transistor. The capacitor compensates for the Miller coupling capacitance within the bias transistor in less than ten nanoseconds. This permits a CML transmitter to more quickly restart the transmission of data after an active state has been initiated.

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