High-speed transistor multivibrator circuit having constant-current biasing to prevent complete cut-off of emitter current

Claim 1

IN A CURRENT SWITCHING MULTIVIBRATOR CIRCUIT, FIRST AND SECOND TRNASISTORS INTERCONNECTED TO FORM A MULTIVIBRATOR, FIRST AND SECOND CONSTANT CURRENT SOURCES CONNECTED RESPECTIVELY TO THE EMITTERS OF SAID TRANSISTORS, FIRST AND SECOND OPPOSITELY-POLED DIODES SERIALLY CONNECTED BETWEEN THE EMITTERS OF SAID TRANSISTORS, THIRD AND FOURTH TRANSISTORS CONNECTED RESPECTIVELY TO SAID FIRST AND SECOND TRANSISTORS TO CONTROL THE SAME, THIRD AND FOURTH CONSTANT CURRENT SOURCES CONNECTED RESPECTIVELY TO THE EMITTERS OF SAID THIRD AND FOURTH TRANSISTORS, THIRD AND FOURTH OPPOSITELY-POLED DIODES SERIALLY CONNECTED BETWEEN THE EMITTERS OF SAID THIRD AND FOURTH TRANSISTORS, AND FIFTH CONSTANT CURRENT SOURCE AND FIFTH TRANSISTOR SERIALLY CONNECTED TO THE JUNCTION OF SAID FIRST AND SECOND DIODES, AND A SIXTH CONSTANT CURRENT SOURCE CONNECTED TO THE JUNCTION OF SAID THIRD AND FOURTH DIODES.