Invention Application
WO2009032573A3 COMMON-MODE BANDWIDTH REDUCTION CIRCUIT AND METHOD FOR DIFFERENTIAL APPLICATIONS 审中-公开
共模带宽减小电路和差分应用方法

COMMON-MODE BANDWIDTH REDUCTION CIRCUIT AND METHOD FOR DIFFERENTIAL APPLICATIONS
Abstract:
An amplifier driver circuit (10A) includes first (11-1) and second (11-2) feedback amplifiers including first (14-1) and second (14-2) upper current mirrors, respectively, and first (16-1) and second (16-2) lower current mirrors, respectively, first (12-1) and second (12-2) amplifier input stages receiving a common mode input signal, and first (18-1) and second (18-2) amplifier output stages coupled to outputs of the first and second amplifier input stages, respectively. Each current mirror has an input and first (OUT1) and second (OUT2) outputs. Upper bias terminals of the first and second amplifier input stages are coupled to the inputs of the first and second upper current mirrors, respectively, and are cross-coupled to the second outputs of the second and first lower current mirrors, respectively. Lower bias terminals of the first and second amplifier input stages are coupled to the inputs of the first and second lower current mirrors, respectively, and are cross-coupled to the second outputs of the second and first upper current mirrors, respectively, to oppose signals at the inputs of the current mirrors in response to the common mode input signal.
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