Pulse or digital communications – Receivers
Patent
1996-03-29
1998-03-31
Tse, Young T.
Pulse or digital communications
Receivers
375247, 375328, 375329, H04B 1406, H04L 2722
Patent
active
057346836
ABSTRACT:
A sigma-delta signal converter is implemented using switched capacitor switching elements in which a first switch (31) serves as a mixer (11). The output of the mixer is directed to the second input of an adder (16), and its second input is the feedback signal (f1) of the sigma-delta signal converter, which is also directed into a base-frequency output signal through a decimator (14) and low-pass filtering (15).
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IEE Journal of Solid-State Circuits., vol. 26, No. 12, Dec. 1991, New York US pp. 1951-1957, K. Lakshmikumar et al., `A Baseband Codec For Digital Cellular Telephony`.
Signal Processing., vol. 22, No. 2, Feb. 1991, Amsterdam NL, pp. 139-151, H.J. Dressler, `Interpolative Bandpass-A/D-Conversion`.
The Design of Sigma-Delta Modulation, Analog-To-Digital Converters, B. Boser et al., IEEE Journal of Solid-State Circuits, vol. 23, No. 6, Dec. 1988, pp. 1298-1308.
Digital Communication, E. Lee et al., Kluwer Academic Publishers, Boston, 1990, pp. 173-176.
Hulkko Jaakko A.
Kontas Veijo L. H.
Siren Lauri T.
Nokia Mobile Phones Limited
Tse Young T.
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