Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Patent
1999-01-06
2000-12-12
Urban, Edward F.
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
455303, 455306, 455315, H04B 110
Patent
active
061610046
ABSTRACT:
In one embodiment, an apparatus comprising a mixing network coupled to a summing stage is presented. The mixing network is operative to receive a signal and process the received signal along a first branch of the mixing network to produce a first mixed signal containing an image signal, and along a second branch of the mixing network to produce a second mixed signal containing the image signal and a desired signal. The summing stage, coupled to the first and second branch of the mixing network, is operative to subtract the first mixed signal from the second mixed signal to produce a downconverted signal comprising the desired signal while rejecting the image signal.
REFERENCES:
patent: 5020147 (1991-05-01), Okanobu
patent: 5113428 (1992-05-01), Fitzgerald
patent: 5140198 (1992-08-01), Atherly et al.
patent: 5179726 (1993-01-01), Moon
patent: 5564098 (1996-10-01), Rodal et al.
patent: 5710997 (1998-01-01), Okanobu
patent: 5752175 (1998-05-01), Roullet et al.
patent: 5802463 (1998-09-01), Zuckerman
patent: 5950119 (1999-09-01), McGeehan et al.
patent: 5953640 (1999-09-01), Meador et al.
patent: 5963724 (1999-10-01), Mantooth et al.
patent: 5971595 (1999-10-01), Grant et al.
patent: 5974241 (1999-10-01), Fusco
Asad A. Abidi, "Direct-Conversion Radio Transceivers for Digital Communications," IEEE Journal of Solid-State Circuits, vol.30, No. 12, Dec. 1995, pp. 1399-1410.
Jan Crols and Michael S. J. Steyaert, "A Single-Chip 900 MHz CMOS Receiver Front-End with a High Performance Low-IF Topology," IEEE Journal of Solid-State Circuits, vol.30, No. 12, Dec. 1995, pp. 1483-1492.
Rudell et al., "A 1.9-GHz Wide-Band IF Double Conversion CMOS Receiver for Cordless Telephone Applications," IEEE Journal of Solid-State Circuits, vol. 32, No. 12, Dec. 1997, pp. 2071-2088.
Jantzi et al., "Quadrature Bandpass .DELTA..SIGMA. Modulation for Digital Radio, " IEEE Journal of Solid-State Circuits, vol.32, No. 12, Dec. 1997, pp. 1935-1950.
Galal Sherif H.
Tawfik Mohamed S.
Jackson Blane J.
Mentor Graphics Corporation
Urban Edward F.
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