INTERFACE CIRCUIT USABLE FOR DIGITAL SIGNAL AND ANALOG SIGNAL IN COMMON

摘要

PROBLEM TO BE SOLVED: To provide an interface circuit which can be used with either a digital signal input or an analog signal input. SOLUTION: Parts for a switching signal input and an analog signal input both in common are put in beforehand, while only terminals 2-10 to connect parts as well as necessary wiring are first assembled for parts for either input and thereafter parts selected according to the type of the signal input are connected to the terminals. An interface circuit is thereby composed which is suitable for either a digital signal input or an analog signal input.