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:
Jul. 01, 2003
Filed:
Mar. 02, 2001
Farhood Moraveji, Saratoga, CA (US);
Micrel, Incorporated, San Jose, CA (US);
Abstract
The present invention provides for an output stage which couples with an input stage and is configured to limit a reflection current which is reflected back into the input stage to enhanced an output voltage to drive a variety of loads. The present output stage limits the reflection current by compensating for at least one bias current at the input stage output. The output stage further reduced a quiescent current needed to maintain the output stage in an active state without adversely affecting the output voltage supplied to the load. The output stage includes a first and second current driving stage, a first and second current compensation circuit and an output circuit. The first and second current driving stages couple with both the input stage and the output circuit. The first and second current driving stages are configured to generate a first and second driving current, respectively, to drive the output circuit, wherein the first driving current is proportional to a first bias current and the second driving current is proportional to a second bias current. To limit reflection current the first current compensation circuit is configured to compensate for the first bias current while the second current compensation circuit is configured to compensate for the second bias current.