发明名称 |
MODULATEUR DELTA-SIGMA |
摘要 |
A Delta-Sigma DELTA SIGMA modulator for one-bit analog to digital conversion of a signal, such as a telephone voice channel switch to digital form is disclosed. The circuit incorporates integration operative as low-pass filtering. The voice signal is sampled at a rate high compared to the highest voice channel frequency component. Sampled instantaneous signal values are integrated, re-sampled and again integrated to reduce encoding noise. Finally, a bi-level sense identifying circuit links the second integrator output to a D type flip-flop providing the one-bit encoded output. The sampling and integrator control is effected by switching in a capacitor charge shifting arrangement under clock control and feedback is applied as a capacitor switching program modifications. |
申请公布号 |
RO84865(A) |
申请公布日期 |
1984.08.17 |
申请号 |
RO19830109753 |
申请日期 |
1983.01.17 |
申请人 |
INTERNATIONAL TELEPHONE AND TELEGRAPH CORP,US |
发明人 |
SHENOI,KISHAN,US;AGRAWAL,BHAGWATI P.,US |
分类号 |
H03H3/02;H03H19/00;H03M3/02;H03M7/36;H04B14/06 |
主分类号 |
H03H3/02 |
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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