发明名称 |
Digital-to-analog converter with noiseshaping modulator, commutator and plurality of unit converters, and method |
摘要 |
A digital-to-analog converter (200) has a first portion (208) which receives a digital input signal X (201') and has serially coupled a second portion (209) which provides an analog output signal Y (202'). The first portion (208) is a delta-sigma modulator with integrators (210 and 215), adders (203 and 205), a comparator (220) and delay stages (230 and 235). The second portion (209) comprises a commutator (260), unit converters (280-n) and an analog adder (290). In the second portion, the unit converters (280-n) can be mismatched. The first portion (208) provides a noise-shaped intermediate signal V (221') which has substantially zero noise at that frequencies where the mismatches would lead to unwanted spectral tones.
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申请公布号 |
US6028544(A) |
申请公布日期 |
2000.02.22 |
申请号 |
US19980002421 |
申请日期 |
1998.01.02 |
申请人 |
MOTOROLA, INC. |
发明人 |
ZARUBINSKY, MICHAEL;KOIFMAN, VLADIMIR;AFEK, YACHIN |
分类号 |
H03M3/02;H03M3/04;H03M7/00;(IPC1-7):H03M3/00 |
主分类号 |
H03M3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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