Clock distribution scheme for user-programmable logic array architecture
US5254886A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1992 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Jun 19, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/1737
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A clock distribution architecture is disclosed for use in a user-programmable logic array integrated circuit comprising an array of user-programmable logic elements having inputs and outputs, at least some of the user-programmable logic elements including sequential logic elements having clock inputs, and further including a plurality of general interconnect lines which may be connected to one another and to the inputs and outputs of the logic elements. The clock distribution architecture includes at least one clock input pin on the integrated circuit, a plurality of clock distribution lines disposed in the array, at least one buffer amplifier having an input connected to the clock input pin and an output connected to at least one of the clock distribution lines. At least one inverter has an input connected to at least one of the clock distribution lines, and an output. A multiplexer is associated with each of the sequential logic elements, each of the multiplexers has a first input connected to one of the clock distribution lines, a second input connected to the output of the inverter, and a third input connected to a clock signal line connectable to at least one of the general in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.