请帮我看看下面单词的意思

cosmo.wang

Note that an inverter between the PFD output and the DN or UP input of the charge pump may be required. In order to ensure that the switches turn on and off when the charge pump output voltages is close to the power-supply rails, the signal from the PFD must be a full rail-to-rail output buffer would be needed..... 下文中还有个mid-rail....... 中间的这个rail是什么意思啊？

cosmo.wang

回复 1# cosmo.wang


     另外我想请问一下大家：各位都是在哪里查询专业词汇的啊？

goodsilicon

rail==轨==power supply or ground