Phase-lock oscillator

Claim 1

AN INDICATOR CIRCUIT COMPRISING, A TRANSISTORIZED EMITTER FOLLOWER SWITCH ADAPED FOR CONNECTION TO AN INPUT SIGNAL FOR OBTAINING AN OUTPUT SIGNAL OF AT LEAST A GIVEN MAGNITUDE, A SCHMITT TRIGGER CIRCUIT EMPLOYING TWO TRANSISTORS EACH HAVING AT LEAST AN EMITTER, A BASE AND A COLLECTOR ELECTRODE, A SWITCHING TRANSISTOR HAVING AT LEAST AN EMITTER, A BASE AND A COLLECTOR ELECTRODE, MEANS CONNECTING THE EMITTER COLLECTOR PATH OF SAID SWITCHING TRANSISTOR IN SERIES WITH AN IMPEDANCE FROM THE EMITTERS OF SAID TWO TRANSISTORS TO ONE SOURCE OF POTENTIAL, MEANS INCLUDING A SEMICONDUCTOR DIODE CONNECTED BETWEEN THE EMITTER OF SAID EMITTER FOLLOWER SWITCH AND THE BASE OF SAID SWITCHING TRANSISTOR FOR BIASING SAID SWITCHING TRANSISTOR TO ITS NON-CONDUCTING STATE FOR AN OUTPUT FROM SAID EMITTER FOLLOWER SWITCH ABOVE SAID GIVEN MAGNITUDE, CROSSOVER MEANS CONNECTING THE BASE ELECTRODE OF THE NORMALLY CONDUCTING TRANSISTOR TO THE COLLECTOR ELECTRODE OF THE NORMALLY NON-CONDUCTING TRANSISTOR OF SAID SCHMITT TRIGGER, MEANS CONNECTING THE EMITTER OF SAID EMITTER FOLLOWER TO THE BASE OF SAID NORMALLY NON-CONDUCTING TRANSISTOR FOR CAUSING IT TO CONDUCT WHEN SAID EMITTER FOLLOWER SWITCH IS CUT OFF, AND IMPEDANCE MEANS CONNECTED BETWEEN EACH OF THE COLLECTORS OF SAID TWO TRANSISTORS AND A SECOND SOURCE OF POTENTIAL, SAID IMPEDANCE MEANS INCLUDING AT LEAST ONE INDICATING MEANS FOR INDICATING THE STATE OF AT LEAST ONE OF SAID TWO TRANSISTORS.