发明名称 |
Bandpass sigma-delta modulator |
摘要 |
A bandpass sigma-delta modulator using acoustic resonators or micro-mechanical resonators. In order to improve resolution at high frequencies, acoustic resonators or micro-mechanical resonators are utilized in a sigma-delta modulator instead of electronic resonators. The quantized output is fed back using a pair of D/A converters to an input summation device. In fourth order devices, the feed back is to two summation devices in series. Such a sigma-delta modulator is usable in a software defined radio cellular telephone system and in other applications where high-frequency and high-resolution A/D conversion is required.
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申请公布号 |
US2004239541(A1) |
申请公布日期 |
2004.12.02 |
申请号 |
US20040867688 |
申请日期 |
2004.06.16 |
申请人 |
NATIONAL UNIVERSITY OF SINGAPORE |
发明人 |
XU YONG-PING |
分类号 |
H03H9/02;H03H9/46;H03H9/54;H03H9/64;H03M3/02;(IPC1-7):H03M3/00 |
主分类号 |
H03H9/02 |
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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