专利名称:Circuit for DC offset cancellation发明人:Kuan Da Chen,Chunwei Hsu申请号:US11449710申请日:20060609
公开号:US20060279344A1公开日:20061214
专利附图:
摘要:A circuit having multiple overlapped feedback loops for DC offset cancellationis provided with applying in one of multistage amplifier, multistage filter, and thecombination thereof. The circuit includes a plurality of negative feedback variablebandwidth switches coupled to each stage of the above mentioned multistage devices,
the output of the last stage is coupled to an input of a low-pass filter loop. The circuitincludes a plurality of variable gain amplifiers, output of each variable gain amplifier iscoupled to the series contact of each stage respectively, and input of each variable gainamplifier is thereof coupled to an output of the low-pass filter loop. Therefore, thecircuit achieves to cancel the DC offset for multistage overlapped feedback path with lessarea and low power consumption.
申请人:Kuan Da Chen,Chunwei Hsu
地址:Taipei TW,Taipei TW
国籍:TW,TW
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