Double mode modulator

Details Double mode modulator Double mode modulator

1998-07-29

2000-05-30

Kinkead, Arnold

Modulators

Frequency modulator

Plural modulation

455553, 455102, 455110, 375216, 332103, 332117, H04L 2732

Patent

active

060695374

ABSTRACT:
A double mode modulator, particularly, for a portable telephone, which is adapted to realize both digital and analog modulations and have a low phase noise and a reduced locking time with a device readily integrated in an integrated circuit, including: a frequency synthesizer for synthesizing a particular frequency from an external reference clock signal; a digital modulator for performing a quadrature modulation for an output signal of the frequency synthesizer; and an analog modulator for performing a frequency modulation for the output signal of the frequency synthesizer.

REFERENCES:
patent: 3931588 (1976-01-01), Gehweiler
patent: 5039893 (1991-08-01), Tomisawa
patent: 5228074 (1993-07-01), Mizikovsky
patent: 5446422 (1995-08-01), Mattila et al.
patent: 5764692 (1998-06-01), Mucke

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