Invention Grant
- Patent Title: Bandpass sigma-delta modulator
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Application No.: US10867688Application Date: 2004-06-16
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Publication No.: US07034727B2Publication Date: 2006-04-25
- Inventor: Yong-Ping Xu
- Applicant: Yong-Ping Xu
- Applicant Address: SG
- Assignee: National University of Singapore
- Current Assignee: National University of Singapore
- Current Assignee Address: SG
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Main IPC: H03M3/00
- IPC: H03M3/00 ; H04B14/06

Abstract:
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.
Public/Granted literature
- US20040239541A1 Bandpass sigma-delta modulator Public/Granted day:2004-12-02
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