Systems and methods for self testing a voltage controlled oscillator
AssigneeQUALCOMM Incorporated
InventorsTracy Hall, Troy Stockstad, Jin Wook Kim
Life of this patent
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Abstract
A method for self testing a multiband voltage controlled oscillator (VCO) is described. A first frequency band in a VCO is selected. An N value is selected for a frequency divider that produces a tuning voltage for the VCO that is between a low tuning voltage limit and a high tuning voltage limit for the VCO. The N value is adjusted in one direction until the tuning voltage reaches one of the tuning voltage limits. This N value at the tuning voltage is a first limit value. The frequency bands are switched from the first frequency band to a second frequency band that is adjacent to the first frequency band.
Claims30
A method for self testing a multiband voltage controlled oscillator (VCO), comprising:
- selecting a first frequency band in a VCO;
- selecting an N value for a frequency divider that produces a tuning voltage for the VCO that is between a low tuning voltage limit and a high tuning voltage limit for the VCO;
- adjusting the N value in one direction until the tuning voltage reaches a first limit value corresponding to one of the tuning voltage limits;
- switching frequency bands from the first frequency band to a second frequency band that is adjacent to the first frequency band;
- and
- determining an overlap between the first and second frequency bands based on the switching.
A wireless device configured to self test a multiband voltage controlled oscillator (VCO), comprising:
- a processor;
- memory in electronic communication with the processor;
- instructions stored in the memory, the instructions being executable by the processor to:
- select a first frequency band in a VCO;
- select an N value for a frequency divider that produces a tuning voltage for the VCO that is between a low tuning voltage limit and a high tuning voltage limit for the VCO;
- adjust the N value in one direction until the tuning voltage reaches a first limit value corresponding to one of the tuning voltage limits;
- switch frequency bands from the first frequency band to a second frequency band that is adjacent to the first frequency band;
- and
- determine an overlap between the first and second frequency bands based on the switching.
A wireless device configured to self test a multiband voltage controlled oscillator (VCO), comprising:
- means for selecting a first frequency band in a VCO;
- means for selecting an N value for a frequency divider that produces a tuning voltage for the VCO that is between a low tuning voltage limit and a high tuning voltage limit for the VCO;
- means for adjusting the N value in one direction until the tuning voltage reaches a first limit value corresponding to one of the tuning voltage limits;
- means for switching frequency bands from the first frequency band to a second frequency band that is adjacent to the first frequency band;
- and
- means for determining an overlap between the first and second frequency bands based on the switching.
A computer-program product for self testing a multiband voltage controlled oscillator (VCO), the computer-program product comprising a non-transitory computer-readable medium having instructions thereon, the instructions comprising:
- code for selecting a first frequency band in a VCO;
- code for selecting an N value for a frequency divider that produces a tuning voltage for the VCO that is between a low tuning voltage limit and a high tuning voltage limit for the VCO;
- code for adjusting the N value in one direction until the tuning voltage reaches a first limit value corresponding to one of the tuning voltage limits;
- code for switching frequency bands from the first frequency band to a second frequency band that is adjacent to the first frequency band;
- and
- code for determining an overlap between the first and second frequency bands based on the switching.
An integrated circuit for self testing a multiband voltage controlled oscillator (VCO), the integrated circuit being configured to:
- select a first frequency band in a VCO;
- select an N value for a frequency divider that produces a tuning voltage for the VCO that is between a low tuning voltage limit and a high tuning voltage limit for the VCO;
- adjust the N value in one direction until the tuning voltage reaches a first limit value corresponding to one of the tuning voltage limits;
- switch frequency bands from the first frequency band to a second frequency band that is adjacent to the first frequency band;
- and
- determine an overlap between the first and second frequency bands based on the switching.
Dependencies are inferred from the claim text.