Telecommunications – Transmitter
Reexamination Certificate
2003-07-21
2011-12-13
Vuong, Quochien B (Department: 2618)
Telecommunications
Transmitter
C455S093000, C341S126000, C341S135000, C341S144000
Reexamination Certificate
active
08078122
ABSTRACT:
Circuitry that generates an interface signal between a first and a second integrated circuit (IC). The circuitry includes a reference circuit that provides a reference signal, an interface circuit, and a circuit element. The interface circuit is implemented on the first IC, operatively couples to the reference circuit, receives the reference signal and a data input, and generates the interface signal. The circuit element is implemented on the second IC, operatively couples to the control circuit, receives the interface signal, and provides an output signal. The reference signal can be a voltage or a current signal, and can be generated in the first or second IC. The interface circuit can be implemented with a current mirror coupled to a switch array, and can be oversampled to ease the filtering requirement. The interface signal can be a differential current signal having multiple (e.g., four, eight, or more) bits of resolution. The circuit element can be, for example, a VGA, a modulator, or other circuits.
REFERENCES:
patent: 4573153 (1986-02-01), Nakamura et al.
patent: 4894864 (1990-01-01), Cook
patent: 5030924 (1991-07-01), Fritz
patent: 5200655 (1993-04-01), Feldt
patent: 5258758 (1993-11-01), Sooch
patent: 5274702 (1993-12-01), Rosch et al.
patent: 5371500 (1994-12-01), Lippmann et al.
patent: 5515014 (1996-05-01), Troutman
patent: 5712635 (1998-01-01), Wilson et al.
patent: 5811984 (1998-09-01), Long et al.
patent: 5847623 (1998-12-01), Hadjichristos
patent: 5880631 (1999-03-01), Sahota
patent: 5963158 (1999-10-01), Yasuda
patent: 0587207 (1994-03-01), None
patent: 04260225 (1992-09-01), None
patent: 08162942 (1996-06-01), None
patent: WO9615585 (1996-05-01), None
Minogue, P., “A 3 V GSM Codec”, Solid-State Circuits, IEEE Journal of Solid State Circuits, vol. 30, Issue 12, pp. 1411-1420, 1995.
Analog Devices, “0.8 GHz-2.5 GHz Quadrature Modulator, AD8346”, Data Sheet, revision 0, 1999.
Analog Devices, “12-Bit, 125 MSPS High Performance TxDAC D/A Converter, AD9752”, Data Sheet, revision 0, 1999.
Analog Devices, “CDMA 3 V Transmitter IF Subsystem with Integrated Voltage Regulator, AD6122”, Data Sheet, revision 0, 1998.
Horowitz, et al., The Art of Electronics, 2nd Ed., Digital Meets Analog, Chaper 9 pp. 612-621, Cambridge University Press, 1980, 1989.
Kimura, K., “Mixer Circuits ”, Wiley Encyclopedia of Electrical and Electronics Engineering, pp. 324-343, Dec. 27, 1999.
Kosunen, et al., “A CMOS Quadrature Baseband Frequency Synthesizer/Modulator”, Solid-State Circuits Conference, 1998. ESSCIRC '98. Proceedings of the 24th European Solid-State Circuits Conference, XP007907207.
Liu, et al., “Complete Mixed-Signal Building Blocks for Single-Chip GSM Baseband Processing”, Proceedings of the 1998 Custom Integrated Circuits Conference, pp. 101-104, 1998.
Neff, “Automatic synthesis of CMOS Digital/Analog Converters”, EECS Department, University of Berkeley, Technical Report No. UCB/ERL M95/28, Ch. 1, 2 and 6, 1995.
Pearse, Robert A., “Voltage References”, Wiley Encyclopedia of Electrical and Electronics Engineering, pp. 344-352, Dec. 27, 1999.
Song, B., “Digital-To-Analog Conversion”, Wiley Encyclopedia of Electrical and Electronics Engineering, pp. 518-530, Dec. 27, 1999.
Wong, C., “A 3-V GSM Baseband Transmitter”, IEEE Journal of Solid-State Circuits, vol. 34, No. 5, pp. 725-730, May 1999.
Silicon Germanium CDMA Transmit/Dual PLL-RFIC Cx74002 Conexant Delivers RF Chipsets for 2G and 3G CDMA Applications, Sep. 30, 2004, pp. 2.
Sahota Gurkanwal
Sani Mehdi H.
Shahrokhinia Sassan
Ho Eric
QUALCOMM Incorporated
Vuong Quochien B
LandOfFree
Interface between digital and analog circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interface between digital and analog circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interface between digital and analog circuits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4315793