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:
Mar. 16, 2004
Filed:
Jul. 19, 2001
John James Gough, Beith, GB;
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An amplifier circuit which includes a differential amplifier, drive circuitry for driving an output of the amplifier circuit in response to an output of the differential amplifier and frequency compensation circuitry switchable between a low current mode and a high current mode of operation. Control circuitry is provided configured to switch the frequency response circuitry between the low and high current modes in response to a magnitude of current provided to a load connected to the amplifier circuit output. In the low current mode, the frequency compensation circuitry produces a frequency response having a first pole located at a first frequency. In the high current mode, the frequency compensation circuitry produces a zero at a second frequency sufficiently close to the first frequency so as to stabilize the amplifier circuit, with the first zero being absent for the frequency response in the low current mode.