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一个运算放大器的性能,可用前馈技术来加以改进。这种前馈法的基本原理是:让信号的高频段经过一个提升放大器,来绕开该运算放大器的前面几级,以扩展频带宽度。其基本线路如图1所示。有些运算放大器是具备引入前馈技术的条件的。其实,只要运算放大器的末级输入也能从外部引入即可。
The performance of an op amp can be improved with feed-forward techniques. The basic principle of this feedforward method is to let the high frequency of the signal go through a boost amplifier to bypass the first few stages of the operational amplifier to extend the bandwidth. The basic line shown in Figure 1. Some op amps have the benefit of introducing feedforward technology. In fact, as long as the final amplifier op amp can also be imported from the outside.