Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Reexamination Certificate
2007-11-27
2007-11-27
Payne, David C. (Department: 2611)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
C329S323000, C375S316000, C455S021000
Reexamination Certificate
active
10371887
ABSTRACT:
A demodulation apparatus that can support various oscillation frequencies. The portable phone device includes a frequency synthesizer for generating a local-oscillation signal having a local oscillation frequency for converting the frequency of an input receiving signal into an intermediate frequency based on an oscillation signal generated by an TCXO and a synchronization hold portion provided with an NCO for generating a signal having a predetermined frequency based on the oscillation signal generated by TCXO. The frequency synthesizer makes the local oscillation frequency variable by setting the dividing ratio variable in accordance with an arbitrary oscillation frequency so that the intermediate frequency remains within a predetermined range regardless of the oscillation frequency, and an NCO makes the frequency of the signal variable by setting the dividing ratio variable in accordance with the oscillation frequency.
REFERENCES:
patent: 5757860 (1998-05-01), Shiota
patent: 6424826 (2002-07-01), Horton et al.
patent: 6754289 (2004-06-01), Komiyama
patent: 6795487 (2004-09-01), Bickerstaff et al.
patent: 2001/0026597 (2001-10-01), Komiyama
patent: 2002/0196881 (2002-12-01), Kalveram et al.
patent: 2003/0058927 (2003-03-01), Douglas et al.
patent: 2003/0076911 (2003-04-01), Kobayashi et al.
patent: 04-061529 (1992-02-01), None
patent: 05-072316 (1993-03-01), None
patent: 06-061795 (1994-03-01), None
patent: 10-068768 (1998-03-01), None
patent: 2001-285110 (2001-10-01), None
patent: 2001-516985 (2001-10-01), None
Sawada Masayuki
Takahashi Hideki
Tanaka Katsuyuki
Teranishi Koichiro
Ettehadieh Aslan
Lerner David Littenberg Krumholz & Mentlik LLP
Payne David C.
Sony Corporation
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