Telecommunications – Transmitter – With feedback of modulated output signal
Reexamination Certificate
2007-03-06
2007-03-06
Urban, Edward F. (Department: 2618)
Telecommunications
Transmitter
With feedback of modulated output signal
C455S114200, C455S127100, C332S162000, C370S205000
Reexamination Certificate
active
10862626
ABSTRACT:
The invention provides a communication semiconductor integrated circuit (RF IC) that, when a transmission oscillator is incorporated into a semiconductor chip, secures the oscillation operation over a wide frequency range, prevents a deterioration of a transmission spectrum, and thereby enhances the accuracy of an oscillation frequency. The integrated circuit corrects a dispersion of the KV characteristic of the transmission oscillator by calibrating a current Icp of the charge pump inside the phase control loop. More in concrete, the integrated circuit measures a KV value Kv of the transmission oscillator, and calibrates the current Icp of the charge pump so that Kv·Icp falls into a predetermined value.
REFERENCES:
patent: 6844788 (2005-01-01), Chadwick
patent: 6853836 (2005-02-01), Asam et al.
patent: 6917791 (2005-07-01), Chadwick
patent: 7062236 (2006-06-01), Midtgaard et al.
patent: 7088968 (2006-08-01), Zipper
patent: 2004-7443 (2004-01-01), None
patent: 2004-112749 (2004-04-01), None
Kenington, Peter B., “High Linearity RF Amplifier Design”, ARTECH House, Inc., 1979, pp. 160-165.
Arayashiki Satoshi
Kimura Yasuyuki
Kurakami Noriyuki
Miyagawa Hirokazu
Okasaka Akira
Jackson Blane J.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Renesas Technology Corp.
Urban Edward F.
LandOfFree
Calibrated PLL for wide band communication semiconductor... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Calibrated PLL for wide band communication semiconductor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calibrated PLL for wide band communication semiconductor... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3794585