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US 4,639,615 AGranted
Trimmable loading elements to control clock skew
AssigneeAT&T Bell Laboratories
InventorsCharles M. Lee, Bernard T. Murphy
Life of this patent
Estimating the term…
Abstract
An integrated circuit chip in which clock pulses are distributed to a plurality of circuits includes a pattern of trimmable elements such as capacitors or transistors. The capacitors or transistors are trimmed during manufacture in order, for example, to adjust clock skew.
Claims12
A semiconductor integrated circuit comprising:
- clock means for generating clock pulses;
- first and second logic circuits each having an output node and controlled by said clock means;
- means for coupling clock pulses from said clock means to a first node connected to said first logic circuit;
- and means for coupling clock pulses from said clock means to a second node connected to said second logic circuit,
- characterized in that
- said integrated circuit further comprises at least one trimmable element connected to said first node and adapted to adjusting the skew of the clock pulses developed at said first logic circuit output node with respect to the clock pulses at said second logic circuit output node.
3 more elements
Dependencies are inferred from the claim text.