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. 15, 2005
Filed:
Oct. 06, 2003
Kevin Scoones, Munich, DE;
Martin Rommel, Freising, DE;
Kevin Scoones, Munich, DE;
Martin Rommel, Freising, DE;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A voltage regulator includes a two-stage feedback circuit for driving a controller formed by a transistorThe feedback circuit includes an error amplifierand an output amplifiera simple compensating circuit in the form of a resistor Rinserted between the inverting inputand the non-inverting inputof the output amplifierresulting in a high phase reserve of the feedback circuit. The resistor Rlimits the gain of the error amplifierfor small load currents by reducing its effective output impedance. This compensating circuit results in the two-stage feedback circuit being highly stable even when very low load currents are involved. This now makes it possible to achieve a very simple linear voltage regulator architecture totally integrated on a single chip. It is especially in battery-powered handhelds such as e.g. mobile phones or electronic organizers that this is important since these devices are often on standby with a low current consumption and activated for use only occasionally.