二是正弦波网络：主要包括正弦量化的电流源整列和开关网络，电流电压转换器，二阶低通滤波器；
The second part is to design the sine wave networks circuits which is composed of sinusoidal current source array and switches, current to voltage converter (I-V converter), two staged LPF, etc.
输出电流为正弦波，不包括多余的高次谐波。
Output current is sine wave and does not include unnecessary high harmonic wave.
输出电流为正弦波，不包括多余的高次谐波。
Output current is sine wave and does not include unnecessary high harmonic wave.
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