如题,谢谢!
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链路上的非线性引起的信号畸变便会产生谐波.对高速adc而言的差分信号的非平衡会影响偶次谐波,因此手册上一般建议是用双巴伦.如下:
The mismatch in the transformer parasitic capacitance (between the windings) results in degraded even-order
harmonic performance. Connecting two identical RF transformers back-to-back helps minimize this mismatch and
good performance is obtained for high-frequency input signals.
非线性主要指信号传输链路上,对信号的幅频特性和相位引起的非线性.
非平衡不止这些,还有差分线的阻抗,匹配,一致性等引起的差分非平衡.
当然信号源出来自身的也会有带有高次谐波分量.