Dual-tune input integrated VCO on a chip
AssigneeSkyworks Solutions, Inc.
InventorsScott A. Griffith, Pete Good, John S. Walley
Life of this patent
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Abstract
A system for controlling an output frequency of a dual-input voltage controlled oscillator relative to a reference frequency is provided. The method includes the step of coupling a first tune control signal to a first input of the dual-input voltage controlled oscillator. The method further includes the steps of dividing the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to a second tune control signal, comparing a phase of the divided output frequency with a phase of the reference frequency and coupling a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
Claims31
A method of controlling an output frequency of a dual-input voltage controlled oscillator relative to a reference frequency where the output frequency of the dual-input voltage controlled oscillator may be controlled at any of a plurality of predetermined operating frequencies, such method comprising the steps of:
- providing a predetermined first tune control signal and a predetermined second tune control signal for each predetermined frequency of the plurality of predetermined operating frequencies;
- selecting a predetermined frequency of the plurality of predetermined operating frequencies;
- coupling the predetermined first tune control signal provided for the selected frequency to a first input of the dual-input voltage controlled oscillator;
- dividing the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to the predetermined second tune control signal provided for the selected frequency;
- comparing a phase of the divided output frequency with a phase of the reference frequency;
- and
- coupling a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
A method of controlling an output frequency of a dual-input voltage controlled oscillator relative to a reference frequency where the output frequency of the dual-input voltage controlled oscillator may be controlled at any of a plurality of predetermined operating frequencies, such method comprising the steps of:
- providing a predetermined first tune control signal and a predetermined second tune control signal for each predetermined frequency of the plurality of predetermined operating frequencies;
- selecting a predetermined frequency of the plurality of predetermined operating frequencies;
- coupling the first tune control signal provided for the selected frequency as a first numeric value to a first input of the dual-input voltage controlled oscillator;
- dividing the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to the second tune control signal provided for the selected frequency as a second numeric value;
- comparing a phase of the divided output frequency with a phase of the reference frequency;
- and
- coupling a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
An apparatus for controlling an output frequency of a dual-input voltage controlled oscillator relative to a reference frequency where the output frequency of the dual-input voltage controlled oscillator may be controlled at any of a plurality of predetermined operating frequencies, such apparatus comprising:
- means for providing a predetermined first tune control signal and a predetermined second tune control signal for each predetermined frequency of the plurality of predetermined operating frequencies;
- means for selecting a predetermined frequency of the plurality of predetermined operating frequencies;
- means for coupling the predetermined first tune control signal for the selected frequency to a first input of the dual-input voltage controlled oscillator;
- means for dividing the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to the predetermined second tune control signal for the selected frequency;
- means for comparing a phase of the divided output frequency with a phase of the reference frequency;
- and
- means for coupling a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
An apparatus for controlling an output frequency of a dual-input voltage controlled oscillator relative to a reference frequency where the output frequency of the dual-input voltage controlled oscillator may be controlled at any of a plurality of predetermined operating frequencies, such apparatus comprising:
- means for providing a predetermined first control signal and a predetermined second tune control signal for each predetermined frequency of the plurality of predetermined operating frequencies;
- means for selecting a predetermined frequency of the plurality of predetermined operating frequencies;
- means for coupling the first tune control signal provided for the selected frequency as a first numeric value to a first input of the dual-input voltage controlled oscillator;
- means for dividing the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to the second tune control signal provided for the selected frequency as a second numeric value;
- means for comparing a phase of the divided output frequency with a phase of the reference frequency;
- and
- means for coupling a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
An apparatus for controlling an output frequency of a dual-input voltage controlled oscillator relative to a reference frequency where the output frequency of the dual-input voltage controlled oscillator may be controlled at any of a plurality of predetermined operating frequencies, such apparatus comprising:
- a predetermined first tune control signal and a predetermined second tune control signal provided for each predetermined frequency of the plurality of predetermined operating frequencies;
- a channel selector adapted to select a predetermined frequency of the plurality of predetermined operating frequencies;
- the predetermined first tune control signal for the selected frequency coupled to a first input of the dual-input voltage controlled oscillator;
- a frequency divider adapted to divide the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to the predetermined second tune control signal for the selected frequency;
- a comparator adapted to compare a phase of the divided output frequency with a phase of the reference frequency;
- and
- a phase detector adapted to couple a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
An apparatus for controlling an output frequency of a single-chip, dual-input voltage controlled oscillator relative to a reference frequency where the output frequency of the dual-input voltage controlled oscillator may be controlled at any of a plurality of predetermined operating frequencies, such apparatus comprising:
- a predetermined first tune control signal and a second predetermined tune control signal provided for each predetermined frequency of the plurality of predetermined operating frequencies;
- a channel selector adapted to select a predetermined frequency of the plurality of predetermined operating frequencies;
- the first tune control signal for the selected frequency provided as a first numeric value coupled to a first input of the single-chip, dual-input voltage controlled oscillator;
- a frequency divider adapted to divide the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to the second tune control signal provided for the selected frequency as a second numeric value;
- a comparator adapted to compare a phase of the divided output frequency with a phase of the reference frequency;
- and
- a phase detector adapted to couple a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
An apparatus for controlling an output frequency of a single-chip dual-input voltage controlled oscillator relative to a reference frequency where the output frequency of the dual-input voltage controlled oscillator may be controlled at any of a plurality of predetermined operating frequencies, such apparatus comprising:
- a predetermined first tune control signal and a predetermined second tune control signal provided for each predetermined frequency of the plurality of predetermined operating frequencies;
- a channel selector adapted to select a predetermined frequency of the plurality of predetermined operating frequencies;
- the predetermined first tune control signal for the selected frequency coupled to a first input of the single-chip dual-input voltage controlled oscillator;
- a fractional frequency divider adapted to divide the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to the predetermined second tune control signal for the selected frequency;
- a comparator adapted to compare a phase of the divided output frequency with a phase of the reference frequency;
- and
- a phase detector adapted to couple a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.
Dependencies are inferred from the claim text.