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US 5,969,390 AGranted
Layout solution for electromagnetic interference reduction
AssigneeZilog, Inc.
InventorBruno Kranzen
Life of this patent
Estimating the term…
Abstract
A polysilicon resistor is added between a source (ground or power) of an EMI core circuitry and a source of the EMI peripheral circuitry. In this way, the electromagnetic interference of an integrated circuit is reduced. The added polysilicon resistor reduces the di/dt of the current passing between the power and the ground of the EMI core circuitry so that the EMI is reduced.
Claims19
A method of reducing the electromagnetic interference ("EMI") of an integrated circuit, the method comprising:
- laying out a chip design for an integrated circuit having, EMI core comprising a core supply and EMI peripheral circuitry comprising a peripheral supply such that an EMI reduction resistor is positioned between said core supply and said peripheral supply of the integrated circuit design,
- wherein the EMI of the integrated circuit is reduced.
A method of reducing the electromagnetic interference ("EMI") of an integrated circuit, the method comprising:
- providing an integrated circuit design layout for a chip having EMI core comprising a core supply and EMI peripheral circuitry comprising a peripheral supply;
- and
- modifying the circuit design layout such that an EMI reduction resistor is positioned between the core supply and the peripheral supply so as to reduce the electromagnetic interference of the chip formed using the modified circuit design layout,
- wherein the EMI of the integrated circuit is reduced.
1 more element
An integrated circuit comprising:
- an electromagnetic interference core circuitry,
- an electromagnetic interference peripheral circuitry;
- and
- an electromagnetic interference reduction resistor positioned between a core supply of the electromagnetic interference core circuitry and a peripheral supply of the electromagnetic interference peripheral circuitry,
- wherein the electromagnetic interface of the integrated circuit is reduced.
2 more elements
Dependencies are inferred from the claim text.