Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Fumihito Inukai0
Date of Patent
December 12, 2006
Patent Application Number
11240575
Date Filed
October 3, 2005
Patent Primary Examiner
Patent 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.
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