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1. 发明授权

US07583215B2 Semiconductor integrated circuit 有权
标题翻译：半导体集成电路
公开(公告)号：US07583215B2
公开(公告)日：2009-09-01
申请号：US12013855
申请日：2008-01-14
申请人： Takaya Yamamoto , Tatsuji Matsuura , Masumi Kasahara , Hideo Nakane , Junya Kudo , Yoshitaka Jingu
发明人： Takaya Yamamoto , Tatsuji Matsuura , Masumi Kasahara , Hideo Nakane , Junya Kudo , Yoshitaka Jingu
IPC分类号： H03M3/00
CPC分类号： H03M3/406 , H03M3/43 , H03M3/454
摘要： The A/D converter converting an analog input signal into a digital output signal is constructed with a band pass ΔΣ modulator. The band pass ΔΣ modulator includes: a resonator showing a band-pass characteristic at a predetermined frequency and an attenuation characteristic at another frequency; a quantizer; and a local D/A converter. A signal of difference between the analog input signal and a local analog signal of the local D/A converter is supplied to the resonator. The A/D converter further includes an adder for supplying the analog input signal to an input of the quantizer. In addition, signal transmission circuits for reducing the influence of spike noise of the quantizer on the input to the resonator are connected between an input of the adder and an input of resonator selectively. The A/D converter constructed with the band pass ΔΣ modulator is improved in S/N ratio.
摘要翻译：将模拟输入信号转换为数字输出信号的A / D转换器由带通DeltaSigma调制器构成。带通DeltaSigma调制器包括：表示预定频率的带通特性的谐振器和另一频率处的衰减特性; 量化器和本地D / A转换器。模拟输入信号和本地D / A转换器的本地模拟信号之间的信号被提供给谐振器。 A / D转换器还包括用于将模拟输入信号提供给量化器的输入的加法器。此外，用于减小量化器的尖峰噪声对谐振器的输入的影响的信号传输电路被选择性连接在加法器的输入和谐振器的输入之间。用带通DeltaSigma调制器构成的A / D转换器的S / N比提高了。

2. 发明申请

US20080169953A1 SEMICONDUCTOR INTEGRATED CIRCUIT 有权
标题翻译：半导体集成电路
公开(公告)号：US20080169953A1
公开(公告)日：2008-07-17
申请号：US12013855
申请日：2008-01-14
申请人： Takaya YAMAMOTO , Tatsuji Matsuura , Masumi Kasahara , Hideo Nakane , Junya Kudo , Yoshitaka Jingu
发明人： Takaya YAMAMOTO , Tatsuji Matsuura , Masumi Kasahara , Hideo Nakane , Junya Kudo , Yoshitaka Jingu
IPC分类号： H03M1/12 , H04L27/06
CPC分类号： H03M3/406 , H03M3/43 , H03M3/454
摘要： The A/D converter converting an analog input signal into a digital output signal is constructed with a band pass ΔΣ modulator. The band pass ΔΣ modulator includes: a resonator showing a band-pass characteristic at a predetermined frequency and an attenuation characteristic at another frequency; a quantizer; and a local D/A converter. A signal of difference between the analog input signal and a local analog signal of the local D/A converter is supplied to the resonator. The A/D converter further includes an adder for supplying the analog input signal to an input of the quantizer. In addition, signal transmission circuits for reducing the influence of spike noise of the quantizer on the input to the resonator are connected between an input of the adder and an input of resonator selectively. The A/D converter constructed with the band pass ΔΣ modulator is improved in S/N ratio.
摘要翻译：将模拟输入信号转换为数字输出信号的A / D转换器由带通DeltaSigma调制器构成。带通DeltaSigma调制器包括：表示预定频率的带通特性和另一频率的衰减特性的谐振器; 量化器和本地D / A转换器。模拟输入信号和本地D / A转换器的本地模拟信号之间的信号被提供给谐振器。 A / D转换器还包括用于将模拟输入信号提供给量化器的输入的加法器。此外，用于减小量化器的尖峰噪声对谐振器的输入的影响的信号传输电路被选择性连接在加法器的输入和谐振器的输入之间。用带通DeltaSigma调制器构成的A / D转换器的S / N比提高了。

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