Apparatus and method for generating an oscillator signal

1. An apparatus for generating an oscillator signal comprising:

a mechanical resonator based oscillator circuit configured to generate a local oscillator signal with a frequency of more than 700 MHz;

a digital-to-time converter circuit configured to generate a frequency adapted signal based on the local oscillator signal;

a mixing circuit configured to generate a frequency converted signal based on the frequency adapted signal and a radio frequency receive signal or a signal associated therewith;

a low frequency oscillator circuit configured to generate a reference oscillator signal with a frequency below 100 MHz; and

a standby control circuit configured to trigger a switching from an off-state to an on-state of the mechanical resonator based oscillator circuit based on the reference oscillator signal,

wherein the frequency converted signal comprises a baseband receive signal, and

wherein the standby control circuit is configured to trigger a switching from an on-state to an off-state of the low frequency oscillator circuit, if the mechanical resonator based oscillator circuit is in an on-state.

2. The apparatus according to claim 1 , wherein the mechanical resonator based oscillator circuit is configured to generate the local oscillator signal based on a mechanical resonator element having a resonance frequency of more than 700 MHz.

3. The apparatus according to claim 1 , wherein the mechanical resonator based oscillator circuit is one of the group comprising a bulk acoustic wave based oscillator, a surface acoustic wave based oscillator, a piezoelectric effect based oscillator and a micro-electro-mechanical-system-based oscillator.

4. The apparatus according to claim 1 , wherein the mechanical resonator based oscillator circuit, the digital-to-time converter circuit and a signal path of the local oscillator signal between the mechanical resonator based oscillator circuit and the digital-to-time converter circuit are phase-locked-loop-less.

5. The apparatus according to claim 1 , wherein the mechanical resonator based oscillator circuit, the digital-to-time converter circuit and a signal path of the local oscillator signal between the mechanical resonator based oscillator circuit and the digital-to-time converter circuit are coil-less.

6. The apparatus according to claim 1 , wherein an inductance between a local oscillator signal input terminal of the digital-to-time converter circuit and a reference potential terminal is lower than 1 nH.

7. The apparatus according to claim 1 , wherein the mechanical resonator based oscillator circuit is configured to generate the local oscillator signal with a frequency of more than 3 GHz.

8. The apparatus according to claim 1 , further comprising:

a second digital-to-time converter circuit configured to provide a second frequency adapted signal based on the local oscillator signal; and

a second mixing circuit configured to generate a second frequency converted signal based on the second frequency adapted signal and a baseband transmit signal or a radio frequency receive signal.

9. The apparatus according to claim 8 , wherein the second mixing circuit is configured to generate a radio frequency transmit signal based on the second frequency adapted signal and a baseband transmit signal.

10. The apparatus according to claim 1 , further comprising a deviation determining circuit configured to generate a deviation signal based on the local oscillator signal and the reference oscillator signal, wherein the deviation signal comprises information indicating a deviation of the local oscillator signal or the reference oscillator signal from a desired behavior.

11. The apparatus according to claim 1 , wherein the mechanical resonator based oscillator circuit, the digital-to-time converter circuit and the mixing circuit are formed on the same semiconductor die.

12. The apparatus according to claim 1 , wherein the mechanical resonator based oscillator circuit is not on the same semiconductor die as at least one of the digital-to-time converter circuit and the mixing circuit.

13. An apparatus for generating an oscillator signal, comprising:

one or more processors configured to:

receive a local oscillator signal with a frequency of more than 700 MHz generated by a mechanical resonator; and

generate a frequency adapted signal based on the local oscillator signal, wherein the one or more processors is further configured to:

receive a reference oscillator signal with a frequency below 100 MHz from a low frequency oscillator circuit; and

trigger a switching from an off-state to an on-state of the mechanical resonator based on the reference oscillator signal,

wherein the one or more processors are configured to trigger a switching from an on-state to an off-state of the low frequency oscillator circuit, if the mechanical resonator is in an on-state.

14. The apparatus according to claim 13 , wherein the mechanical resonator and the one or more processors are formed on the same semiconductor die.

15. The apparatus according to claim 13 , wherein the one or more processors are configured to delay the local oscillator signal by a variable temporal delay to generate a frequency adapted signal comprising a frequency different from a frequency of the local oscillator signal.

16. The apparatus according to claim 13 , wherein the mechanical resonator is one of the group comprising a bulk acoustic wave based oscillator, a surface acoustic wave based oscillator, a piezoelectric effect based oscillator and a micro-electro-mechanical-system-based oscillator.

17. An apparatus for generating an oscillator signal comprising:

a mechanical resonator based oscillator circuit configured to generate a local oscillator signal with a frequency of more than 700 MHz;

a digital-to-time converter circuit configured to generate a frequency adapted signal based on the local oscillator signal and a phase component of a baseband transmit signal; and

a mixing circuit configured to generate a frequency converted signal based on the frequency adapted signal and the baseband transmit signal,

wherein the frequency converted signal comprises a radio frequency transmit signal.