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:
May. 18, 2004
Filed:
Jul. 31, 2002
Robert S. Wrathall, Scotts Valley, CA (US);
Micrel, Inc., San Jose, CA (US);
Abstract
A compensation circuit for introducing a zero in a first circuit being incorporated in a closed loop feedback system includes a first capacitor, an amplifier with capacitive feedback and a second capacitor, connected in series between an input node and a summing node in the first circuit. In one embodiment, the summing node is an intermediate node between two gain stages of a second circuit in the first circuit. The capacitive feedback can be formed by a third capacitor coupled in parallel with one or more of the gain stages in the amplifier. In operation, the capacitance of the second capacitor and an input impedance of the second gain stage of the second circuit introduce a zero in the closed loop feedback system at the third node. The compensation circuit can be applied to a switching regulator controller for adding a zero in the feedback system of a switching regulator.