Patent ID: 7418237

Claim:
An electric circuit for an inductively implemented low-frequency telemetric transmission, the electric circuit comprising: a direct current source for supplying electric power to the electric circuit; a resonance circuit for telemetric transmission; and a quenching circuit coupled to the resonance circuit and comprising a semiconductor transistor switch, the semiconductor transistor switch being configured to switch the quenching circuit into an electrically conductive state to prevent oscillation of the resonance circuit, and the semiconductor transistor switch being configured to switch the quenching circuit into a state preventing the passage of electric current to enable oscillation of the resonance circuit, wherein the quenching circuit comprises at least one electric restriction component for preventing the passage of a base current of the semiconductor transistor switch when the semiconductor transistor switch is switched open, wherein at least one electric restriction component comprised by the quenching circuit is a diode coupled between one pole of the resonance circuit and the semiconductor transistor switch in a non-conducting direction to prevent the passage of current from a collector to a base of the semiconductor transistor switch.