Fortunately op-amps are very flexible and the inverting configuration can be biased to center the output signal about a nonzero DC level.

• 幸运的是，运算放大器非常灵活。我们可以通过在反相电路构造上增加一个偏置电压，从而使使出信号处在以一个非0的直流电平为中间值的范围内。