Oscillator circuit with a fast transient

1. An oscillator circuit for producing a frequency signal, comprising:

a resonator element;

an amplifier circuit to supply power to the resonator element, the amplifier apparatus having a series circuit of inverter elements; and

a coupling apparatus,

wherein the coupling apparatus is in a form such that it connects the amplifier circuit to the resonator element for the duration of a switching-on process in the oscillator circuit.

2. The oscillator circuit as claimed in claim 1 , wherein the coupling apparatus is in a form such that it decouples the amplifier circuit from the resonator element outside of the switching-on process.

3. The oscillator circuit as claimed claim 1 , wherein the resonator element has a crystal oscillator.

4. The oscillator circuit as claimed claim 3 , wherein the resonator element has a quartz crystal.

5. The oscillator circuit as claimed in claim 1 , wherein the amplifier apparatus is connected in parallel with the resonator element.

6. The oscillator circuit as claimed in claim 1 , wherein the amplifier circuit has an uneven number of inverters.

7. The oscillator circuit as claimed claim 1 , wherein the oscillator circuit being in the form of a Colpitts oscillator.

8. The oscillator circuit as claimed in claim 1 , wherein the coupling apparatus includes at least one transductance element.

9. The oscillator circuit as claimed in claim 1 , wherein the coupling apparatus includes at least two elements, a first of the two elements preceding the amplifier circuit and a second of the two elements following the amplifier circuit.

10. The oscillator circuit as claimed in claim 9 , wherein in the two elements are transductance elements.

11. The oscillator circuit as claimed in claim 1 , wherein the coupling apparatus is to receive a first signal to enable the coupling apparatus to connect the amplifier circuit to the resonator element.

12. The oscillator circuit as claimed in claim 11 , wherein the coupling apparatus is to receive a second signal to disable the coupling apparatus from connecting the amplifier circuit to the resonator element.

13. The oscillator circuit as claimed in claim 12 , wherein the coupling apparatus includes a first input to receive the first signal and a second input to receive the second signal.

14. The oscillator circuit as claimed in claim 1 , wherein the coupling apparatus is coupled in series with the amplifier circuit.

15. the oscillator circuit as claimed in claim 1 , wherein the coupling apparatus is to couple the amplifier circuit to the resonator element for a complete duration of a switching-on process in the oscillator circuit.