US Patent Application 20090108929 - Apparatuses and methods for providing offset compensation for operational amplifier
InventorAssigneeUS Classes330/9, WITH PERIODIC SWITCHING INPUT-OUTPUT (E.G., FOR DRIFT CORRECTION)330/260, Having signal feedback means348/222.1Combined image signal generator and general image signal processingAttorney, Agent or FirmInternational ClassesH03F 3/45H03F 1/02 H04N 5/225 Issued Patent Number:7642846Abstract textApparatuses and methods for providing offset compensation include a primary amplifier which includes a first output, a second output, a first load input, and a second load input, a first feedback loop connected to the primary amplifier and which includes a first switch located between the first output of the primary amplifier and the first load input, and a first sampling capacitor coupled to the first switch between the first switch and the first load input and a second feedback loop connected to the primary amplifier and which includes a second switch located between the second output of the primary amplifier and the second load input, and a second sampling capacitor coupled to the second switch between the second switch and the second load input. |
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