Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2005-02-04
2008-11-18
Mai, Lam T (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S155000
Reexamination Certificate
active
07453381
ABSTRACT:
The invention relates to a power-saving multibit delta-sigma converter (1) comprising: an input (2) for an analog input signal (ZA) and an output (3) for a digital output signal (ZD); a digital-to-analog converter (4) having a bit width N and serving to convert the digital output signal (ZD) to an analog feedback signal (Z3); a summing device (5) for solving the difference between the input signal (ZA) and the feedback signal (Z3); a filter (6) for filtering the difference signal (Z1); and a clocked quantizing device (7) for quantizing the filtered difference signal (Z2) into a digital output signal (ZD) with the bit width N. Said quantizing device (7) comprises a number of comparators (21, 22, 23) that compare the filtered signal (Z2) with a respective reference potential (U0,U6) associated with each comparator (21, 22, 23) and they each output a comparison result (V1,V2,V3) to a decoder (33), which generates the digital output signal (ZD) from the comparison results (V1,V2,V3), and the reference potentials (U0,. . . U6) are updated according to a previous comparison result.
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Doerrer Lukas
Kuttner Franz
Infineon - Technologies AG
Jenkins Wilson Taylor & Hunt, P.A.
Mai Lam T
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