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1.发明公开Bandpass sigma-delta modulator with anti-resonance cancellation 有权Bandpass-Sigma-Delta-Modulator mitAntiresonanzunterdrückung
公开(公告)号：EP1684421A1
公开(公告)日：2006-07-26
申请号：EP06002858.6
申请日：2002-11-13
摘要： A bandpass sigma-delta modulator using acoustic resonators or micro-mechanical resonators. In order to improve resolution at hight 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. A cancellation circuit may remove the anti-resonance signal from a resonator. An anti-resonance cancellation circuit removes the anti-resonance from the output of the resonators by providing a signal which is subtracted from the output of the resonator. The cancellation circuit includes a capacitor which is matched to the static capacitance of the resonator. The loads of the resonator and cancellation network are also matched.
摘要翻译： 使用声谐振器或微机械谐振器的带通Σ-Δ调制器。 为了提高高频分辨率，在Σ-Δ调制器代替电子谐振器中使用声谐振器或微机械谐振器。 量化输出使用一对D / A转换器反馈到输入求和装置。 在第四级装置中，反馈是串联的两个求和装置。 这种Σ-Δ调制器可用于软件定义的无线电蜂窝电话系统以及需要高频和高分辨率A / D转换的其它应用中。 消除电路可以从谐振器去除反谐振信号。 反共振消除电路通过提供从谐振器的输出中减去的信号来消除谐振器的输出的反谐振。 消除电路包括与谐振器的静态电容相匹配的电容器。 谐振器和取消网络的负载也匹配。
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2.发明授权Bandpass sigma-delta modulator with anti-resonance cancellation 有权Bandpass-Sigma-Delta-Modulator mitAntiresonanzunterdrückung
公开(公告)号：EP1684421B1
公开(公告)日：2008-01-02
申请号：EP06002858.6
申请日：2002-11-13
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