De-emphasis system and method for coupling digital signals...

Details De-emphasis system and method for coupling digital signals... De-emphasis system and method for coupling digital signals...

2006-05-25

2008-05-20

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C327S321000

Reexamination Certificate

active

07375573

ABSTRACT:
A system for de-emphasizing digital signals, such as address signals, boosts the level of the signals for one clock period prior to transmitting the signals through signal lines that may have a relatively large capacitance. The system may include a delay circuit that delays the digital signal for a period corresponding to one period of a clock signal. The system may also include a first multiplier circuit that generates a first intermediate signal by multiplying the first and second logic levels of the digital signal by a first multiplier. Similarly, a second multiplier circuit generates a second intermediate signal by multiplying the first and second logic levels of the delayed signal from the delay circuit by a second multiplier. A combining circuit then subtracts the second intermediate signal from the first intermediate signal, and the resulting signal is level-adjusted to generate the de-emphasized signal.

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