Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1987-08-27
1990-05-22
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307451, 307579, 307270, 307263, H03K 1716, H03K 19003, H03K 512
Patent
active
049280236
ABSTRACT:
A CMOS push-pull output buffer is disclosed, which utilizes two reference nodes in the pull-down side. A first of the reference nodes is dedicated to switching the output from a high to a low logic state. A switching circuit is provided for driving the pull-down transistor associated with the first reference node responsive to the input node transition, but which turns off this pull-down transistor responsive to the output node approaching its final voltage. The second reference node is dedicated for holding the output node low in the DC state. A drive circuit is provided for driving the pull-down transistor associated with this second reference node, but which does not turn on this pull-down transistor until the output node has approached its final voltage, preferably when the first pull-down transistor is turned off. By controlling the turning on of the second pull-down transistor responsive to the output voltage, the coupling of noise from the first reference node to the second reference node can be minimized.
REFERENCES:
patent: 4395644 (1983-07-01), Misaizu
patent: 4731553 (1988-03-01), Van Lehn et al.
Callahan Timothy P.
Comfort James T.
Holland Robby T.
Miller Stanley D.
Sharp Melvin
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