Load current compensation for analog input buffers
摘要:
Systems and methods for load current compensation for analog input buffers. In various embodiments, an input buffer may include a first transistor (Q1) having a collector terminal coupled to a power supply node and a base terminal coupled to a first input node (vinp); a second transistor (Q2) having a collector terminal coupled to an emitter terminal of the first transistor (Q1); a third transistor (Q3) having an emitter terminal coupled to an emitter terminal of the second transistor (Q2) and to a ground node, a collector terminal coupled to a current source (Ibias), and a base terminal coupled the collector terminal and to a base terminal of the second transistor (Q2); and a capacitor (C1) coupled to the base terminals of the second and third transistors (Q2 and Q3) and to a second input node (vinn), wherein the first and second input nodes (vinp and vinn) are differential inputs.
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