发明名称 |
CONVERSION OF A PCM SIGNAL INTO A UPWM SIGNAL |
摘要 |
To correct non-linearity and noise in the conversion of a pulse code modulat ed signal (PCM) into a uniform pulse width modulated signal (UPWM), a model is made of the known non-linearity in the conversion by dividing a plurality of non-linearity components in the model, where the polynomial components are separately weighted with filter coefficients. The model is used as a basis for the construction of a filter of the Hammerstein type whose non-linear parts consist of a division of the PCM signal into a plurality of powers, and whose linear parts are approximated by means of the model made. With the circuit o f the invention it is now possible to construct a purely digital amplifier which has a great efficiency, low weight, etc.
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申请公布号 |
CA2249460(C) |
申请公布日期 |
2006.11.28 |
申请号 |
CA19972249460 |
申请日期 |
1997.03.26 |
申请人 |
RISBO, LARS;ANDERSEN, HANS K. |
发明人 |
RISBO, LARS;ANDERSEN, HANS K. |
分类号 |
H03M1/82;H03M5/08;H03F3/217;H04L25/49 |
主分类号 |
H03M1/82 |
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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