Digital noise reduction in integrated circuits and circuit assemblies
US6121827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1999 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Apr 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3025
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A mixed signal integrated circuit board having decreased sensitivity of analog circuitry to digital circuitry noise is disclosed. In the mixed-signal integrated board of the present invention, a new (second) analog ground is created. This new analog ground is not limited by the manufacturing specification of connectivity to the substrate of the circuit board and is thereby free of transient noise generated by digital components on the board. In a mixed-signal integrated circuit board of the present invention, the new analog ground becomes the preferred ground and is utilized in many sensitive analog applications including voltage and current measurements. The new analog ground is easy to create as it does not involved complicated circuitry. The new analog ground may be created even after the initial circuit schematics has been created.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.