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:
Aug. 28, 2001
Filed:
Aug. 16, 1999
Prabir C. Maulik, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A class AB operational amplifier has first and second intermediate differential nodes respectively driving intermediate stage inverting and non-inverting amplifiers to produce a single-ended output voltage, which are provided with a frequency compensating feedback signal at a selected one of the first and second intermediate differential nodes, derived from the single-ended output of the operational amplifier subject to frequency compensation. The frequency compensating feedback signal is generated with the feedback circuitry. The feedback circuitry includes a compensation capacitor connected to the single-ended output and a current mirror circuit connected to the selected one of the first and second intermediate differential nodes of the operational amplifier.