The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2001
Filed:
Jun. 18, 1999
Rogelio Peon, Gijon, ES;
Maarten Visee, Houten, NL;
Lucent Technologies Inc., Murray Hill, NJ (US);
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.