BIAS CURRENT COMPENSATION CIRCUIT FOR A DIFFERENTIAL INPUT STAGE

A bias current compensation circuit for a differential input stage has a compensation current supplying circuit and a compensation selecting circuit. The compensation current supplying circuit generates a compensation current. The compensation selecting circuit is coupled between the compensation cu...

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Bibliographic Details
Main Author LIN CHING-TZUNG
Format Patent
LanguageEnglish
Published 08.05.2008
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Summary:A bias current compensation circuit for a differential input stage has a compensation current supplying circuit and a compensation selecting circuit. The compensation current supplying circuit generates a compensation current. The compensation selecting circuit is coupled between the compensation current supplying circuit and a first and a second input terminals of the differential input stage. When the first input terminal needs to be driven by a first bias current, the compensation selecting circuit determines to allow the compensation current to be applied to the first input terminal for serving as the first bias current. When the second input terminal needs to be driven by a second bias current, the compensation selecting circuit determines to allow the compensation current to be applied to the second input terminal for serving as the second bias current.
Bibliography:Application Number: US20060557489