Integrated circuit output driver for differential transmission l

Details Integrated circuit output driver for differential transmission l Integrated circuit output driver for differential transmission l

1998-02-13

1999-08-17

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Signal transmission integrity or spurious noise override

327112, 327391, 327437, 326 21, 326 86, H03K 1716, H03K 300

Patent

active

059399260

ABSTRACT:
An integrated circuit driver chip includes an on-board precision current reference source, a pull-up FET and a pull-down FET having a common node connected to a transmission line. A variable switching edge pre-driver drives at least one of the pull-up FET and pull-down FET in accordance with a push-pull fast edge mode and a wired-OR slow edge mode and includes a weak FET and a strong FET selectively connected in parallel with the weak FET to implement the push-pull fast edge mode while the weak FET operating alone implements the wired-OR slow edge mode. A switched current source selectively sources current through the pull-up FET to the transmission line in accordance with the data signal and includes a trickle current FET switch for maintaining charge stored on a parasitic capacitance when the pull-up FET is off thereby preventing current spikes during turn-on switching of the pull-up FET.

REFERENCES:
patent: 4329600 (1982-05-01), Stewart
patent: 5329186 (1994-07-01), Hush et al.
patent: 5381062 (1995-01-01), Morris
patent: 5623221 (1997-04-01), Miyake
patent: 5831458 (1998-11-01), Nakagawa
patent: 5834948 (1998-11-01), Yoshizaki et al.

Affiliated with

Also associated with

Rating

Integrated circuit output driver for differential transmission l does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Integrated circuit output driver for differential transmission l, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated circuit output driver for differential transmission l will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-318352