The upper break frequency, $$f_2$$, of a typical amplifier is a function of the circuit gain and the op amp’s unity-gain frequency, $$f_{unity}$$. Typical op amps exhibit a 20 dB per decade roll off slope in their open-loop response. When negative feedback is applied, this results in a direct tradeoff between closed-loop gain and $$f_2$$. Any increase in gain results in an equivalent decrease in $$f_2$$, and vice versa. In other words, the product of closed-loop gain and $$f_2$$ must be a constant. This constant can be found on a device data sheet as either $$f_{unity}$$ or GBW (short for Gain-BandWidth product).