求翻译：第二步是电源的选取：运放上的电源是必需要有的电源，尤其是在系统的总的增益电路的高电平一端是不可或缺的。通常采用LC震荡电路实现。 LC值和信号的频率、电容的质量有关。一般的音频部分，L可以在几个微H到几十微H 之间。是什么意思？

The second step is the selection of power: the power operation is essential to have put the power supply, especially in the total system gain of the circuit's high end is essential. Usually lc oscillator circuit to achieve. lc value and the signal frequency, the quality of the capacitor. The audio p

Step 2: Select the power of the power supply is placed on the power supply are essential to the overall system, especially in the high-voltage circuits of GAINS is indispensable. Circuit realization LC shocks are usually used. LC and signal frequency, capacitance value on the quality. In general, th

The second step is the power source selection: The power source which transports puts the power source which is essential must have, in a system total gain electric circuit high level end is indispensable in particular.Usually uses the LC shake electric circuit realization. The LC value and the sign

The second step is selection of power supply: operational amplifier power is required on some power, especially in high end of the system the total gain of the circuit is essential. Usually uses the LC oscillation circuit. LC value of frequency, capacitance and signal quality. The audio portion of l