Signal converting circuit

摘要

A converter circuit for converting signals from a non-CMOS circuit into signals for a CMOS circuit. A level shifter stage in the circuit has a first MOS transistor for receiving at its gate the non-CMOS signals which always enable the first transistor and a second MOS transistor for receiving at its gate a constant voltage for enabling the second transistor. Since these transistors do not switch between non-enabling and enabling conditions in order to change the logic levels at the output of the converter circuit, the circuit operates quickly. In one embodiment the converter circuit converts ECL signals into CMOS signals, and in a second embodiment the converter circuit converts TTL signals into CMOS signals.