Method and apparatus for implementing a common mode level shift

Details Method and apparatus for implementing a common mode level shift Method and apparatus for implementing a common mode level shift

1994-03-31

1995-06-13

Hudspeth, David R.

Electronic digital logic circuitry

Interface

Logic level shifting

326 82, H03K 1730

Patent

active

054246571

ABSTRACT:
The level shifter provides a selective voltage level shift to a common mode signal level on a twisted pair signal line. The level shift is selectively performed based upon the input level of the common mode voltage. The level shifter is advantageously employed in a low voltage circuit wherein lacking sufficient voltage head room to accommodate a constant common mode level shift. An exemplary embodiment is described wherein the level shifter is employed within a bus transceiver of a bus system employing IEEE P1394 bus protocol. In the exemplary embodiment, the selective level shift is applied only to bus signals occurring during an idle phase and an arbitration phase, with no level shift performed during a data phase.

REFERENCES:
patent: 4904953 (1990-02-01), McCormack
patent: 5105099 (1992-04-01), Routh et al.
patent: 5179586 (1993-01-01), Lee
patent: 5317214 (1994-05-01), Lewis

Affiliated with

Also associated with

Rating

Method and apparatus for implementing a common mode level shift does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for implementing a common mode level shift , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for implementing a common mode level shift will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1312204