Oscillator circuit

Integrated circuit comprising an oscillator circuit, wherein the oscillator circuit comprises:

• a multivibrator for generating an oscillator signal, wherein the multivibrator comprises at least one current path;
• a supply circuit having a first current path, a second current path and a third current path;
• a current mirror for mirroring a current through the second current path into the first current path, the third current path and the at least one current path of the multivibrator;
• a first field effect transistor in the first current path, wherein the first field effect transistor is configured to be operated in saturation on the basis of a first gate voltage;
• a second field effect transistor in the second current path, which is dimensioned in a manner deviating from the first field effect transistor, wherein the second field effect transistor is configured to be operated in saturation on the basis of the first gate voltage;
• a third field effect transistor in the second current path, wherein the third field effect transistor is configured to be operated in strong inversion and in the linear region on the basis of a second gate voltage;
• and
• a fourth field effect transistor in the third current path, wherein the fourth field effect transistor is configured to be operated in strong inversion and in saturation on the basis of the second gate voltage.

Method for operating an oscillator circuit, comprising:

• operating a first field effect transistor in a first current path in weak inversion and saturation on the basis of a first gate voltage;
• operating a second field effect transistor in the second current path in weak inversion and saturation on the basis of the first gate voltage, wherein the second field effect transistor is dimensioned in a manner deviating from the first field effect transistor;
• operating a third field effect transistor in the second current path in strong inversion and in the linear region on the basis of a second gate voltage;
• operating a fourth field effect transistor in a third current path in strong inversion and in saturation on the basis of the second gate voltage;
• and
• mirroring a current in the second current path into the first current path, the third current path and into at least one current path of a multivibrator for generating an oscillator signal.