A T2L to I2L interface circuit

摘要

The collector of a transistor Q1 in a T2L output stage 540 is connected via resistors R2, R3 to the bases of transistors Q2, Q3 in I2L input stages 544 of an interface circuit, the collector of the transistor Q2, Q3 providing an I2L level signal. The base 548 of the transistor Q2 has the "dog-bone" configuration shown in Fig 4B. IMAGE