Circuit for direct digital delta-sigma conversion of...

Details Circuit for direct digital delta-sigma conversion of... Circuit for direct digital delta-sigma conversion of...

2005-12-13

2005-12-13

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S126000

Reexamination Certificate

active

06975258

ABSTRACT:
An electronic circuit for the direct conversion of a capacitive transducer signal to a digital delta-sigma bit stream is disclosed. The electronic circuit is comprised of two functional blocks, in which the variable transducer capacitance is first transformed and represented by a frequency modulated (FM) signal by a variable frequency oscillator, and subsequently converted to a digital delta-sigma representation using a frequency delta-sigma modulator. The electronic circuit eliminates any need for analog components in conjunction with the capacitive transducer, and hence simplifies the front-end circuit for applications where digital signal processing (DSP) is used. The output bit stream of the electronic circuit is similar to other analog to digital delta-sigma converters, and can therefore be processed using similar digital techniques.

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patent: 2003/0098699 (2003-05-01), Lemkin et al.

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