Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1992-02-24
1994-03-22
Westin, Edward P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307475, 307451, 307473, H03K 1716, H03K 19092
Patent
active
052967581
ABSTRACT:
A ground bounce compensating output buffer for an integrated circuit is disclosed. The circuit includes a pull-up transistor, the gate of the pull-up transistor is coupled to an input line, the output of the pull-up transistor is coupled to an output line. The pull-up transistor discharges current to ground during a state transition. The discharge of current to ground creates ground bounce due to the resistance and inductance of the package lead. A pull-down transistor is also provided. The gate of the pull-down transistor is also coupled to the input line, the output of the pull-down transistor is also coupled to the output line. The pull-down transistor also discharges current to ground during a state transition and thereby produces ground bounce. To reduce the ground bounce, the disclosed circuit includes compensating devices positioned between the input line and the gate of the pull-down transistor. The first compensating device includes a mechanism for regulating drive current to the pull-down transistor in the presence of ground bounce. A second compensating device limits voltage to the first compensating device in the presence of ground bounce. As a result, the second compensating device further regulates drive current to the pull-down transistor during ground bounce. A third compensating device generates a constant drive current to the pull-down transistor in the presence of ground bounce. The design of the circuit provides optimal signal delays to minimize totem pole current which would otherwise produce additional ground bounce.
REFERENCES:
patent: 4918339 (1990-04-01), Shigeo et al.
patent: 4947063 (1990-08-01), O'Shaughnessy et al.
patent: 4959561 (1990-09-01), McDermott et al.
patent: 5028817 (1991-07-01), Patil
patent: 5216299 (1993-06-01), Wanlass
National Semiconductor Corporation
Roseen Richard
Westin Edward P.
LandOfFree
Output buffer with ground bounce compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Output buffer with ground bounce compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Output buffer with ground bounce compensation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-439092