Three-level asynchronous switching circuit

Claim 1

A CURRENT SWITCHING CIRCUIT HAVING AT LEAST THREE DIFFERENT STABLE OUTPUTS COMPRISING: A PAIR OF LIKE TRANSISTORS EACH HAVING AN EMITTER, A COLLECTOR AND A BASE; EACH OF SAID TRANSISTORS BEING BIASED FROM A CONSTANT CURRENT SOURCE; A PAIR OF UNILATERALLY CONDUCTING DEVICES CONNECTED IN PARALLEL OPPOSED CONDUCTING RELATION AND INTERCONNECTING THE EMITTER ELECTRODES OF THE SAID TRANSISTORS; SAID DEVICES BEING ALSO CONNECTED BETWEEN THE SAID CURRENT SOURCES COUPLED TO THE SAID TRANSISTORS; AN INPUT CIRCUIT CONNECTED TO THE BASE OF ONE OF THE SAID PAIR OF TRANSISTORS; THE BASE OF THE OTHER OF SAID PAIR OF TRANSISTORS BEING CONNECTED TO A SOURCE OF REFERENCE POTENTIAL; A NORMAL OUTPUT CIRCUIT CONNECTED TO THE COLLECTOR OF ONE OF THE SAID PAIR OF TRANSISTORS; AND A COMPLEMENTARY OUTPUT CIRCUIT CONNECTED TO THE COLLECTOR OF THE OTHER OF THE SAID PAIR OF TRANSISTORS; WHEREBY POSITIVE, GROUND AND NEGATIVE INPUT SIGNALS CAUSE A NORMAL OUTPUT OF TWO, ONE AND ZERO, AND A COMPLEMENTARY OUTPUT OF ZERO, ONE AND TWO.