Figure 1 exploits these impressive features while also accommodating one quirk. To ensure stability, the OP37 requires a minimum closed loop gain of 5 = 14 dB. Satisfying this requirement is assured ...

Op amps have an approximate open-loop gain of 100 dB at a frequency of 10 Hz, and the op-amp gain rolls off at a rate of –20 dB/decade. The closed-loop-gain equation for a noninverting op amp is: The ...