Logic network with logic circuits from different logic families

摘要

The logic circuits (S1,S2) have constant current sources, delivering constant currents of opposite direction, for coupling their output stages to termination impedances (Zo). The logic circuits are coupled together on the output side by a coupling resistance (R3) between their termination impedances. Pref. each logic circuit has a complementary output stage, with a further termination impedance (Zo), both termination impedances coupled together at the terminal (A,B) coupled to the coupling resistance. A number of identical logic circuits may be coupled to each coupling resistance terminal.