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Expired Canadian patentCanada

High-speed dynamic cmos circuit

CA 1298359 C · Owner: Northern Telecom Limited · Inventors: Roy, Marc P.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Programmable logic array, multiplexer and memory array circuits utilizing the dynamic CMOS logic of the invention are capable of operating at speeds approximating twice that of similar circuits utilizing conventional dynamic CMOS logic. The circuit of the invention has an AND plane defined by a series of input columns and a series of rows, and has an OR plane defined by the series of rows and one or more output columns. Transistors are connected selectively between the input columns and the rows and, between the output columns and the rows. During one state of an external clock input to the circuit each of a series of inputs are placed on a respective one of the input columns each of the, …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 28, 1989
GrantedMarch 31, 1992
Term endedMarch 31, 2009
Patent numberCA 1298359 C
Classification (IPC)H03K19/01 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedAug 28, 1989Patent grantedMarch 31, 1992Term endedMarch 31, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.