Frequency shift keying modulator and applications thereof
AssigneeBroadcom Corporation
InventorsTom Baker, Henrik T. Jenson
Life of this patent
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Abstract
An FSK modulator and applications thereof are disclosed. The FSK modulator comprises a phase-locked loop, a frequency divider module, an image rejection mixer and a summing module. The phase-locked loop is operably coupled to generate a first oscillation from a reference oscillation. The frequency divider module is operably coupled to divide the first oscillation to produce a second oscillation. The image-rejection mixer is operably coupled to mix the second oscillation with a low intermediate oscillation to produce a mixed data signal, and the summing module is operably coupled to sum the mixed data signal with the first oscillation to produce an FSK modulated signal.
Claims12
A frequency shift keying (FSK) modulator comprises:
- a phase-locked loop operably coupled to generate a first oscillation from a reference oscillation;
- a frequency divider module operably coupled to divide the first oscillation to produce a second oscillation;
- an image-rejection mixer operably coupled to mix the second oscillation with a low intermediate oscillation data signal to produce a mixed data signal;
- and
- a summing module operably coupled to sum the mixed data signal with the first oscillation to produce an FSK modulated signal.
A method for frequency shift keying (FSK) modulation, the method comprises:
- generating a first oscillation;
- dividing the first oscillation by a divider value to produce a second oscillation;
- image-rejection mixing the second oscillation with a low intermediate frequency (IF) FSK modulated data signal to produce a mixed data signal;
- and
- summing the mixed data signal with the first oscillation to produce an FSK modulated signal.
An apparatus for frequency shift keying (FSK) modulation, the apparatus comprises:
- a processing module;
- and
- a memory operably coupled to the processing module, wherein the memory includes operational instructions that cause the processing module to:
- generate a first oscillation;
- divide the first oscillation to produce a second oscillation;
- image-rejection mix the second oscillation with a low intermediate oscillation data signal to produce a mixed data signal;
- and
- sum the mixed data signal with the first oscillation to produce an FSK modulated signal.
Dependencies are inferred from the claim text.