High-precision buffer circuit

摘要

A buffer circuit includes an input terminal operable to receive an input signal and an output terminal at which an output signal for the buffer circuit is provided. In the buffer circuit, three transistors at most provide signal currents. Two of the three transistors can be matched. Means are provided for feeding back the output signal so that the two matched transistors are balanced in response to a change in the input signal appearing at the input terminal.