ECL also draws almost constant current during switching (unless it is driving asymmetrical loads) and has much smaller output voltage swings than TTL or CMOS.

• ECL结构在状态转换期间的输入电流几乎不变（除非驱动非平衡负载），其输出摆幅也远远小于TTL或者CMOS结构。因此，虽然ECL的工作速度高于TTL和CMOS，但是其噪声更低[参见参考资料9]。