Apparatus and method for reducing common-mode current in...

Details Apparatus and method for reducing common-mode current in... Apparatus and method for reducing common-mode current in...

2003-03-26

2004-10-12

Shingleton, Michael B (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S260000, C330S291000, C327S108000

Reexamination Certificate

active

06803820

ABSTRACT:

BACKGROUND
In a conventional differential link, two conductors are driven in complementary fashion by respective legs of an output buffer to generate differential output signals. Ideally the sum of the currents provided by the two legs of the output buffer is constant. However, in practice, it may occur during switching of the differential output signals that the current in one leg may decrease at a rate that is faster or slower than the rate of increase in the current in the other leg. As a result, an excess current may exit the output buffer in common-mode format. This may cause electromagnetic interference (EMI), a distortion in the duty cycle of the output signal, output jitter and/or a reduction in the “eye opening” at the receiver.


REFERENCES:
patent: 6664820 (2003-12-01), Estrada
patent: 2003/0098021 (2003-05-01), Heineke et al.
patent: 4135305 (1992-05-01), None
“Differential-to-common-mode Conversion”, download from http://www.signalintegrity.com/Pubs/edn/DifftoCommonMode.htm, on Feb. 4, 2003, Oct. 17, 2002, 1pg.
“4.3—A 62Gb/s Backplane Interconnect ASIC Based on 3.1Gb/s Serial-Link Technology”, download from http://www.signalintegrity.com/Pubs/edn/DifftoCommonMode.htm, on Feb. 4, 2003, 3pgs.

Affiliated with

Also associated with

Rating

Apparatus and method for reducing common-mode current in... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for reducing common-mode current in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for reducing common-mode current in... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3278458