Differential line driver having adjustable common

专利名称：Differential line driver having adjustable

common mode operation

发明人：Matthew D. Felder申请号：US09790780申请日：20010222

公开号：US20020113626A1公开日：20020822

专利附图：

摘要：A differential line driver that includes a 1operational amplifier, a 2operationalamplifier, an adjustable reference module, a 1feedback impedance, and a 2feedbackimpedance. First inputs (e.g. the inverting input or non-inverting input) of the 1and

2operational amplifiers are coupled to receive an input signal. The 2inputs (e.g. thecompliment of the 1input) of the 1and 2operational amplifiers are operably coupled toreceive an adjustable reference voltage from the adjustable reference module. Theadjustable reference module provides the adjustable reference voltage based on thecommon mode of the power source for the 1and 2operational amplifiers (e.g. V, V,)and/or the common mode of the input signal. The 1and 2feedback impedances, (e.g.resistors) are coupled from the output of the respective operational amplifiers to eitherthe 1or 2input of the respective operational amplifiers.

申请人：SIGMA TEL, INC.

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