Dithered digital gain scalar/summer

Details Dithered digital gain scalar/summer Dithered digital gain scalar/summer

1997-09-16

1999-12-07

Tokar, Michael

Coded data generation or conversion

Analog to or from digital conversion

Increasing converter resolution

341139, H03M 120

Patent

active

059991143

ABSTRACT:
A method of breaking up idle tones in a converter is used for gain scaling and summing of digital input signals. The invention achieves this object by introducing dither. Further, the invention optimizes the dither introduced by adapting the magnitude of the dither based on the value of the feedback gain factor of the converter. By adapting the dither in this way, the output idle channel noise can be essentially constant and independent of the scaling factor of the converter.

REFERENCES:
patent: 5144308 (1992-09-01), Norsworthy
patent: 5191331 (1993-03-01), Karema et al.
patent: 5410310 (1995-04-01), Molnar
patent: 5530442 (1996-06-01), Norsworthy et al.
patent: 5530443 (1996-06-01), Borgen et al.
Patent No. 5144308, filed on May 21, 1991 and issued on Sep. 1, 1992 to Norsworthy. Class: 341/131.
Patent No. 5483238, filed on Dec. 16, 1993 and issued on Jan. 9, 1996 to Norsworthy. Class: 341/131.

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