Oscillators – Automatic frequency stabilization using a phase or frequency... – With reference oscillator or source
Reexamination Certificate
2007-04-17
2007-04-17
Chang, Joseph (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
With reference oscillator or source
C455S076000, C331S002000
Reexamination Certificate
active
11181876
ABSTRACT:
In a communication semiconductor integrated circuit device using offset PLL architectures and including an oscillator circuit and a frequency divider circuit generating an intermediate frequency signal, the oscillator circuit includes an oscillator, a programmable frequency divider which frequency-divides the oscillation signal in accordance with frequency division information, a phase comparator detecting a phase difference between an output signal of the programmable frequency divider and a reference signal, and a frequency control unit for outputting a signal indicative of the phase difference and controlling the oscillation frequency of the oscillator, wherein a frequency division ratio generator circuit generates an integer part I and a fraction part F/G based on band information concerning the use frequency band and mode information along with channel information and for producing the frequency division ratio information to thereby give it to the programmable frequency divider.
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Henshaw Robert Astel
Kimura Yasuyuki
Osawa Hirotaka
Uozumi Toshiya
Yamamoto Satoru
Chang Joseph
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Renesas Technology Corp.
TTPCom Limited
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