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:
Dec. 20, 2005
Filed:
Jul. 13, 2004
Geir Sigurd Ostrem, Colorado Springs, CO (US);
Ajay Kuckreja, Boulder, CO (US);
Geir Sigurd Ostrem, Colorado Springs, CO (US);
Ajay Kuckreja, Boulder, CO (US);
Maxim Integrated Products, Inc., Sunnyvale, CA (US);
Abstract
Wide band CMOS digital to analog converters (DACs), including converters with selectable impulse response, using multiple DAC cores. The DAC cores operate on the same data at the DAC clock rate, but staggered in phase. Switches are used to switch the later part of the output time of each DAC core to the DAC output, otherwise to a dummy load. Thus each DAC conversion is comprised of a later part of each DAC core conversion, at least the first part of each DAC core conversion being ignored to allow each DAC core to settle before utilizing its output. Since the same switches and switching sequence is used on each DAC data conversion, the effects of switch imbalances are negated. Various embodiments are disclosed, including manipulation of the input to one of the DAC cores to selectively provide an NRZ, RZ and an RF response.