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Current differencing buffered amplifier

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CDBA, current differencing buffered amplifier, is a multi-terminal active component with two inputs and two outputs. It is derived from current feedback amplifier (CFA).

The characteristic equation of this element can be given as:

Vp=Vn=0, Iz=Ip-In, Vw=Vz

Here, current through z-terminal follows the difference of the currents through p-terminal and n-terminal. Input terminals p and n are internally grounded. The difference of the input currents are converted into the output voltage Vw , therefore CDBA element can be considered as a special type of current feedback amplifier with differential current input and grounded y input.

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