Variable frequency transistor multivibrator

Claim 1

A MULTIVIBRATOR COMPRISING FIRST AND SECOND TRANSISTORS EACH HAVING AN OUTPUT, CONTROL AND COMMON ELECTRODE, A FIRST SOURCE OF REFERENCE POTENTIAL, RESISTIVE MEANS INDEPENDENTLY CONNECTING THE OUTPUT ELECTRODES OF THE SAID TRANSISTORS TO THE FIRST SOURCE OF REFERENCE POTENTIAL, A SECOND SOURCE OF REFERENCE POTENTIAL, MEANS CONNECTING THE COMMON ELECTRODES TO THE SAID SECOND SOURCE OF REFERENCE POTENTIAL, FIRST MEANS INCLUDING A CAPACITOR INTERCONNECTING THE OUTPUT ELECTRODE OF THE FIRST TRANSISTOR AND THE CONTROL ELECTRODE OF THE SECOND TRANSISTOR, SECOND MEANS INCLUDING A CAPACITOR INTERCONNECTING THE OUTPUT ELECTRODE OF THE SECOND TRANSISTOR AND THE CONTROL ELECTRODE OF THE FIRST TRANSISTOR, MEANS INCLUDING A VARIABLE IMPEDANCE CONNECTED BETWEEN THE FIRST SOURCE OF REFERENCE POTENTIAL AND TO THE COMMON CONNECTION OF TWO UNIDIRECTIONAL CURRENT CONDUCTORS EACH OF WHICH HAS ITS NON-COMMON TERMINAL CONNECTED TO THE CONTROL ELECTRODE OF A DIFFERENT TRANSISTOR, FIRST SWITCH MEANS COUPLED TO THE FIRST TRANSISTOR OUTPUT ELECTRODE FOR MAINTAINING THE SECOND TRANSISTOR OUTPUT ELECTRODE VOLTAGE AT ITS OVERDRIVEN VALUE DURING SUBSTANTIALLY THE ENTIRE CONDUCTION PERIOD OF SAID SECOND TRANSISTOR, AND SECOND SWITCH MEANS COUPLED TO THE SECOND TRANSISTOR OUTPUT ELECTRODE FOR MAINTAINING THE FIRST TRANSISTOR OUTPUT ELECTRODE VOLTAGE AT ITS OVERDRIVEN VALUE DURING SUBSTANTIALLY THE ENTIRE CONDUCTION PERIOD OF SAID FIRST TRANSISTOR.