Delta-sigma modulation circuit with gain control function

Details Delta-sigma modulation circuit with gain control function Delta-sigma modulation circuit with gain control function

2006-12-12

2006-12-12

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

C341S143000

Reexamination Certificate

active

07148829

ABSTRACT:
A delta-sigma modulation circuit with a gain control function includes a variable gain amplifier, a control unit that controls the gain of the variable gain amplifier, a delta-sigma modulator that inputs an output from the variable gain amplifier, and a filter circuit that inputs an output from the delta-sigma modulator. The control unit that controls the gain of the variable gain amplifier gain controls the delta-sigma modulator. By this, the optimum dynamic range is obtained according to the setting level of the variable gain amplifier without causing the dynamic range to vary depending on the setting level of the variable gain amplifier.

REFERENCES:
patent: 6404367 (2002-06-01), Van der Zwan et al.
patent: 6567025 (2003-05-01), Schreier et al.
patent: 2004/0207549 (2004-10-01), Easwaran et al.
patent: 2006/0092059 (2006-05-01), Gulmaraes
patent: 818457 (1996-01-01), None

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