Method and device for soft-driving an array of logic gates and s

Details Method and device for soft-driving an array of logic gates and s Method and device for soft-driving an array of logic gates and s

1996-07-15

1998-08-25

Dinh, Son T.

Static information storage and retrieval

Magnetic bubbles

Velocity

365 17, 365 27, 365 97, H03K 1716

Patent

active

057989591

ABSTRACT:
Switching distortion in a digitally controlled attenuator is effectively suppressed and soft-switching in passgate arrays, present at a certain point of a logic signal path, is implemented with a minimum number of additional components. The soft switching in passgate arrays is implemented by driving the control nodes of each passgate by an inverter, at least a current terminal of which is made switchable from the respective supply node to a node onto which an appropriate ramp signal toward the potential of the respective supply potential is produced by a suitable controlled ramp generator. The passgates for switching the current terminals of the inverters are controlled by the logic signal that preexisted the intervening switching on the respective signal line of the passgate, and by its inverse. The preexistent logic value is momentarily stored in a latch that is updated at the end of any new switching process. The switching distortion is suppressed by causing a fast turn-on of the selected switch and a slowed-down turn-off of the deselected switch and by connecting in parallel to the portion of the resistive voltage divider pertaining to the change of output tap a shunt resistance, deselected from the signal path downstream of the selected switch. The deselected switch is driven by a ramp of a preset slope. A circuit sensing the sign of the change of attenuation of the contingent command, configures a pair of switches that deselect the shunt resistance.

REFERENCES:
patent: 4611135 (1986-09-01), Nakayama et al.
patent: 4633101 (1986-12-01), Masuda et al.
patent: 4683386 (1987-07-01), Kamikawara
patent: 5003204 (1991-03-01), Cushing et al.
patent: 5027019 (1991-06-01), Shiohara
patent: 5121014 (1992-06-01), Huang
patent: 5216289 (1993-06-01), Hahn et al.
patent: 5394034 (1995-02-01), Becker et al.
patent: 5598107 (1997-01-01), Cabuk

Affiliated with

Also associated with

Rating

Method and device for soft-driving an array of logic gates and s 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 device for soft-driving an array of logic gates and s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for soft-driving an array of logic gates and s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-40991