Method and amplification circuit with pre-emphasis

Details Method and amplification circuit with pre-emphasis Method and amplification circuit with pre-emphasis

2005-02-08

2005-02-08

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S052000

Reexamination Certificate

active

06853220

ABSTRACT:
A method for amplifying a digital signal representative of data to be transmitted by a line driver with pre-emphasis over an output line is provided. The gain of the line driver is varied between an upper value to coincide with switching of the digital signal and a lower value in absence of the digital signal switching. In particular, the varying includes amplifying the digital signal with a first gain for generating an amplified digital signal, delaying the digital signal with a predetermined delay for generating a delayed digital signal, and amplifying the delayed digital signal with a second gain for generating a delayed and amplified digital signal. An ouput signal corresponding to a difference between the amplified digital signal and the delayed and amplified digital signal is output over the output line.

REFERENCES:
patent: 5739707 (1998-04-01), Barraclough
patent: 6535019 (2003-03-01), De Santis
patent: 6542144 (2003-04-01), Kogure et al.
patent: 6566911 (2003-05-01), Moyer
patent: 6590432 (2003-07-01), Wu et al.

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