System for fast switching of time critical input signals

Details System for fast switching of time critical input signals System for fast switching of time critical input signals

1995-07-03

1997-01-07

Hudspeth, David R.

Electronic digital logic circuitry

Accelerating switching

326 21, 326 93, H03K 1901

Patent

active

055921035

ABSTRACT:
A technique is provided for switching circuitry in a manner which allows the circuit to respond quickly to changes in some critical input signals expected to arrive last. In the preferred embodiment the circuits of this invention are provided in triple logic column form. A circuit will typically include at least two logic columns, each having three portions serially coupled between a high and a low potential source. The middle portion of each logic column is connected to the output node and to receive the critical input signal expected to arrive last, or the input signal with the critical timing requirement. The upper and lower portions of each logic column are connected to receive the remaining input signals, that is those input signals not expected to be changing at the time the critical input signal is received. Thus, the state of the upper and lower portions of the logic column can be "set-up" in advance, in readiness for the critical input condition. Typically, the invention provides three logic columns - - - one logic column for causing the output to follow changes in the state of the critical input signals, one logic column for causing the output to have a state which is the reverse of the state of the critical input signals, and a final logic column for holding the condition of the output constant regardless of changes in the state of the critical input signals.

REFERENCES:
patent: 4899066 (1990-02-01), Aikawa et al.
patent: 4940908 (1990-07-01), Tran
patent: 5121003 (1992-06-01), Williams
patent: 5389835 (1995-02-01), Yetter

Affiliated with

Also associated with

Rating

System for fast switching of time critical input signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for fast switching of time critical input signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for fast switching of time critical input signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1767529