Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-08-08
2010-12-14
Le, Thanh C (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S254000
Reexamination Certificate
active
07853229
ABSTRACT:
In one aspect, a calibration component configured to calibrate an automatic gain controller (AGC) for use in a tuner configured to isolate a selected channel from a multi-channel broadcast signal, the tuner implemented substantially on two chips, a first chip comprising a radio frequency (RF) integrated circuit adapted for RF processing and a second chip comprising a digital integrated circuit adapted for digital processing is provided. The calibration component comprises a calibration signal generator implemented on the RF integrated circuit, the calibration signal generator adapted to generate a generally known calibration signal, a power detector implemented on the RF integrated circuit and configured to detect, during calibration, at least one power characteristic of the calibration signal and to provide a power level signal indicative of the at least one detected power characteristic, a gain controller implemented on the digital integrated circuit, the gain controller adapted to generate at least one error signal based, at least in part, on a comparison between the power level signal provided by the power detector and a first reference signal, an offset signal generator implemented on the RF integrated circuit and configured to generate an offset signal based, at least in part, on the at least one error signal and a summing element implemented on the RF integrated circuit and adapted to combine the offset signal with the power level signal provided by the power detector to provide an adjusted power level signal.
REFERENCES:
patent: 7091792 (2006-08-01), Mehr
patent: 2002/0142745 (2002-10-01), Kang et al.
patent: 2003/0012313 (2003-01-01), Husted et al.
patent: 2006/0166633 (2006-07-01), Mehr
patent: 2006/0264192 (2006-11-01), Kuo et al.
patent: 1 724 953 (2006-11-01), None
International Preliminary Report on Patentability in corresponding International Application No. PCT/US2008/009455, dated Feb. 9, 2010.
B-E. Kim et al., “A 9dBm IIP3 Direct-Conversion Satellite Broadband Tuner-Demodulator SOC,”2003, Digest of Technical Papers, ISS CC. 2003, IEEE International Solid-State Circuits Conference, San Francisco, CA Feb. 9-13, 2003, Piscataway, NJ, IEEE, US. Feb. 9, 2003, pp. 1-10.
S. Drude, and M. Klecha, “System Aspects for Broadcast TV Reception in Mobile Phones,”Consumer Electronics, 2006. ICCE '06. 2006 Digest of Technical Papers, pp. 269-270.
S. Amiot, G. Bassement, A. Daubenfeld, V. Fillatre, E. Maurice, F. Mercier, T. Mevel, Y. Richard and J-R Tourret, “A Low Power DVB-T/H Zero-IF Tuner IC Design in 0.25 μm BiCMOS Technology for Mobile TV Reception,”IEEE Transactions on Broadcasting, IEEE Service Center, Piscataway, NJ, vol. 53, No. 1, Mar. 1, 2007, pp. 434-440.
International Search Report and Written Opinion for International Application No. PCT/US2008/009455, mailed Nov. 27, 2008.
Abaskharoun Nazmy
L'Bahy Hassan
Maulik Prabir C.
Paterson Donald
Rose Steven
Analog Devices Inc.
Knobbe Martens Olson & Bear LLP
Le Thanh C
LandOfFree
Methods and apparatus for calibration of automatic gain... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for calibration of automatic gain..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for calibration of automatic gain... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4187016