发明名称 |
SPECTRUM CONVERTER FOR ANALOG SIGNALS |
摘要 |
A device for receiving analog and discrete input signals and for converting the spectrum thereof without loss of information. The resultant signal has a frequency response curve which exhibits zero points at the frequency zero and at half the sample frequency. The second zero point is then suitable for addition of a pilot tone, without the required bandwidth being increased and without interference with the data signal. The device comprises two integrating feedback loops (32, 24/40), the output signals of which are alternately activated. The sign of the active output signal determines the sign of the input signal of the feedback loops and of the output signal of the device. One feedback loop directly receives said output signal, while the other feedback loop receives this output signal via a multiplier which alternately receives a positive and a negative multiplicand. |
申请公布号 |
DE3061865(D1) |
申请公布日期 |
1983.03.17 |
申请号 |
DE19803061865 |
申请日期 |
1980.04.23 |
申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
DE NIET, EDMOND;RIJCKAERT, ALBERT MARIA ARNOLD |
分类号 |
H03M5/20;H04L25/49;(IPC1-7):H04L25/49 |
主分类号 |
H03M5/20 |
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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