Frequency shift keying modulator and applications thereof

Details Frequency shift keying modulator and applications thereof Frequency shift keying modulator and applications thereof

2011-07-12

2011-07-12

Tran, Khai (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S303000

Reexamination Certificate

active

07978789

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.

REFERENCES:
patent: 5179359 (1993-01-01), McLeod
patent: 6674812 (2004-01-01), Stevenson
patent: 6678503 (2004-01-01), Black et al.
patent: 6747987 (2004-06-01), Meador et al.
patent: 2002/0008588 (2002-01-01), Khan

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