1. The equivalent resistance of all the resistors connected to logical "1" and the equivalent resistance of all the resistors connected to logical "0" form the two legs of a composed voltage divider driving the transistor.

논리적 "1"에 연결된 저항과 논리적 "0"에 연결된 저항은 트랜지스터로 형성된 전압 분리기의 두 다리 역할을 한다.