This makes for a good buffer amplifier, with infinite impedance on the input and zero impedance on the output. Ideally, at least. Figure 3 The buffer amplifier provides infinite input impedance and ...

Texas Instruments (TI) has introduced a high-input-impedance (Hi-Z) buffer amplifier, capable of supporting frequency bandwidths as high as 3 GHz. The wider bandwidth and high slew rates of the BUF802 ...