Method and electronic circuitry for providing a stable digital to analog converter analog output in integrated circuit digital to analog converter applications
US6195030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jun 18, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/742
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and electronic circuitry for providing a Digital to Analog converter analog output in Integrated Circuit Digital to Analog Converter applications, said analog output being stable over temperature and supply changes, independent on transistor parameters of a particular chip, and stable for transistor parameter variation from chip to chip. An integrated circuit reference cell is implemented; an internal (secondary) reference quantity determining the analog Digital to Analog Converter (DAC) output is generated; the said internal (secondary) reference quantity for the Digital to Analog converter is referenced to on-chip device specific internal (primary) reference output from the chip in question, and the said chip device specific internal (primary) reference output, is processed further in order to derive a fixed predetermined DAC reference value, that is equal for any chip; and said fixed predetermined DAC reference value is supplied to the digital input of said Digital to Analog converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.