CIRCUIT AND CIRCUIT DESIGN METHOD

摘要

A circuit and a circuit design method are provided. The circuit operates between a first power source voltage and a ground voltage. The circuit comprises at least one low speed circuit path and at least one high speed circuit path. The low speed circuit path adjusts voltage level at the first power source voltage or the ground voltage. The low speed circuit path provides a first return path and isolates unwanted noise signals for a signal on the high speed circuit path.