Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2007-02-09
2010-10-19
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S144000
Reexamination Certificate
active
07817074
ABSTRACT:
A D/A converter (100) includes a delta-sigma modulation circuit (102) including a quantizer (105) that receives a digital signal to quantize it based on a quantization reference value, a local D/A conversion circuit (107) for converting an output from the delta-sigma modulating circuit to an analog signal to be outputted, and a control circuit (109) for correcting the quantization reference value of the quantizer. The quantization reference value is established for each of a plurality of discrete output values that the quantizer may output. The control circuit (109) corrects the quantization reference value to cancel any distortion that would occur in a circuit, following the delta-sigma modulation circuit (102) and including the local D/A conversion circuit (107).
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International Search Report issued Mar. 27, 2007 in International (PCT) Application PCT/JP2007/052351.
Nguyen Linh V
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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