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:
Apr. 25, 2006
Filed:
Oct. 08, 2003
Jingwei Xu, Plano, TX (US);
Zbigniew J. Lata, Plano, TX (US);
William E. Grose, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
System for providing a switched regulator with an adjustable operating frequency range. A preferred embodiment comprises a voltage supply and a load, a switch and filter block (SFB) (such as the SFB), a comparator (such as the comparator), and a fixed off time logic (FOTL) (such as the FOTL). The comparator compares an output voltage with a reference voltage. When the output voltage is equal to or exceeds the reference voltage, the comparator asserts a value on a signal line to the FOTL. The FOTL then shuts down the SFB for a specified period of time. During the off time, the output voltage decays. After the specified period of time expires, the SFB is turned back on and the output voltage can recharge. The duration of time that the SFB remains on is a function of the supply voltage, thus permitting an adjustable operating frequency.