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:
Nov. 07, 2000
Filed:
Jun. 01, 1999
David R MacQuigg, Tucson, AZ (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A low noise buffer circuit for increasing the slew rates of transitions between signal states of a digital signal while drawing minimal transient power supply current during such signal state transitions. Successive alternating digital signal inversion circuits conduct respective power supply source and sink currents which: are unregulated source currents and regulated sink currents during respective low-to-high output signal transitions; transition from unregulated source currents and regulated sink currents to regulated source currents and unregulated sink currents, respectively, during respective high output signal states; are regulated source currents and unregulated sink currents during respective high-to-low output signal transitions; and transition from regulated source currents and unregulated sink currents to unregulated source currents and regulated sink currents, respectively, during respective low output signal states.