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:
Jan. 11, 2005
Filed:
Mar. 17, 2003
James Scott Prater, Fort Collins, CO (US);
James Scott Prater, Fort Collins, CO (US);
NaTIONAL Semiconductor Corporation, Santa Clara, CA (US);
Abstract
Within one embodiment, a voltage detector circuit detects whether a voltage supply (e.g., V) is in a high or low range and generates a logic output. Using this logic output, a variable RC (resistor capacitor) Vfilter may be implemented such that at high Vthe amount of resistance is increased, thereby increasing the decoupling on the Vline and reducing the size of current spikes on V. This is particularly useful in circuits that function over a wide range of Vsupply. The voltage detector circuit can also be used in other embodiments as well. For example, the voltage detector circuit may be used to change the drive strength (e.g., effective W/L) of an output driver such that more drive is provided at low Vand less at high Vthereby having the effect of reducing rise/fall time variation and reducing the size of current spikes at high V.