Systems and methods for minimizing harmonic interference

1. An apparatus comprising:

an oscillator configured to generate a first clock signal having a first duty cycle;

a counter coupled to the oscillator and configured to count between a first number and a second number; and

a controller coupled to the counter and configured to generate a second clock signal from the first clock signal, the second clock signal having a second duty cycle different than the first duty cycle, wherein the controller is configured to generate the second duty cycle based on an output of the counter, the second clock signal to reduce harmonic interference in an intermediate frequency signal in a wireless transceiver.

2. The apparatus of claim 1 , wherein the first duty cycle comprises a symmetric duty cycle and the second duty cycle comprises an asymmetric duty cycle.

3. The apparatus of claim 1 , wherein the controller is configured to receive a first count value and a second count value.

4. The apparatus of claim 3 , wherein the controller is configured to trigger an edge of the second clock signal when the output of the counter corresponds to the first count value.

5. The apparatus of claim 1 , wherein the first clock signal and the second clock signal have the same frequency.

6. The apparatus of claim 1 , wherein the controller is configured to reset the counter to the first number upon initialization.

7. The apparatus of claim 1 , wherein the controller is configured to provide the second clock signal to the wireless transceiver.

8. The apparatus of claim 1 , wherein the counter comprises a modular down counter.

9. A method comprising:

receiving a counter value from a counter configured to count between a predetermined number range;

comparing the counter value to a first count threshold; and

generating an output clock signal from an input clock signal based on the comparison, wherein the output clock signal has a duty cycle different than the input clock signal.

10. The method of claim 9 , further comprising receiving the input clock signal with a symmetric duty cycle and generating the output clock signal with an asymmetric duty cycle.

11. The method of claim 9 , further comprising generating the output clock signal with a first value if the counter value is above the first count threshold and with a second value if the counter value is below the first count threshold.

12. The method of claim 9 , wherein the duty cycle corresponds to a ratio between the first count threshold and the predetermined number range.

13. The method of claim 9 , further comprising:

receiving the input clock signal from an oscillator; and

providing the output clock signal to digital circuitry.

14. A method comprising:

generating a first clock signal with a first duty cycle at a first frequency using an oscillator; and

generating a second clock signal at the first frequency with a second duty cycle formed by a first transition and a second transition, the second transition initiated when a value of a counter coupled to the oscillator is at a predetermined value.

15. The method of claim 14 , further comprising generating the first clock signal at an intermediate frequency.

16. The method of claim 14 , further comprising providing the second clock signal to a digital portion of an integrated circuit comprising a transceiver.

17. The method of claim 16 , further comprising generating the first clock signal via the oscillator, wherein the oscillator and the digital portion are located on a single substrate of the integrated circuit.

18. The method of claim 14 . further comprising receiving a first count value and a second count value to set the second duty cycle.

19. The method of claim 14 , further comprising generating the first clock signal with a symmetric duty cycle and generating the second clock signal with an asymmetric duty cycle.