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多频音调电路是由若干组LC串联谐振回路组合而成的音调控制器,它可以对所需频率进行随心所欲的调节,控制效果明显,是高传真录放声设备上有用的单元电路。由于理想运算放大器可以用虚地来表示,而实际运放的性能又接近理想运放,所以用运算放大器代替分立元件制作多频音调电路时,其性能仅取决于外部反馈网络的特性,而与运放本身性能无关,这种特性使得该音调按制器的设计变得简单。
Multi-frequency tone circuit is composed of a number of LC series resonant circuit combination of tone controller, which can be arbitrarily adjusted for the desired frequency, the control effect is obvious, high-fidelity audio and video recording equipment useful unit circuit. Since the ideal op amp can be expressed in virtual ground and the actual op amp’s performance is close to that of an ideal op amp, the performance of an op amp in place of discrete components for multi-tone circuitry depends only on the characteristics of the external feedback network, Op amp itself has nothing to do with the performance, this feature makes the design of the pitch by the controller becomes simple.