发明公开
EP3183821A1 LOW NOISE AND LOW POWER PASSIVE SAMPLING NETWORK FOR A SWITCHED-CAPACITOR ADC WITH A SLOW REFERENCE GENERATOR
审中-公开
基本信息:
- 专利标题： LOW NOISE AND LOW POWER PASSIVE SAMPLING NETWORK FOR A SWITCHED-CAPACITOR ADC WITH A SLOW REFERENCE GENERATOR
- 专利标题（中）：具有慢速参考发生器的低噪声低功耗被动采样网络
- 申请号：EP15763120.1 申请日：2015-08-15
- 公开(公告)号：EP3183821A1 公开(公告)日：2017-06-28
- 发明人： ALLADI, Dinesh Jagannath , GUO, Yuhua
- 申请人： Qualcomm Incorporated
- 申请人地址： 5775 Morehouse Drive San Diego, CA 92121-1714 US
- 专利权人： Qualcomm Incorporated
- 当前专利权人： Qualcomm Incorporated
- 当前专利权人地址： 5775 Morehouse Drive San Diego, CA 92121-1714 US
- 代理机构： Tomkins & Co
- 优先权： US201462038504P 20140818; US201514826928 20150814
- 国际公布： WO2016028650 20160225
- 主分类号： H03M3/02
- IPC分类号： H03M3/02 ; G06G7/186 ; H03M3/04
摘要：
Certain aspects of the present disclosure provide various sampling networks for switched-capacitor integrators, which may be used in switched-capacitor analog-to-digital converters (ADCs). Rather than having both an input sampling capacitor and a reference sampling capacitor, certain aspects of the present disclosure use a shared sampling capacitor for the reference voltage and the input voltage, thereby reducing ADC input-referred noise, decreasing op amp area and power, and avoiding anti-aliasing filter insertion loss. Furthermore, by sampling the reference voltage during the sampling phase and sampling the input voltage during the integration phase using the shared sampling capacitor, a high-bandwidth reference buffer need not be used for the reference voltage.
摘要（中）：
本公开的某些方面提供用于开关电容积分器的各种采样网络，其可用于开关电容模数转换器（ADC）中。 本发明的某些方面不是同时具有输入采样电容器和参考采样电容器，而是使用用于参考电压和输入电压的共享采样电容器，从而降低ADC输入参考噪声，降低运算放大器面积和功率，以及 避免了抗混叠滤波器的插入损耗。 此外，通过在采样阶段采样参考电压并在采用共享采样电容的积分阶段对输入电压进行采样，不需要使用高带宽参考缓冲器作为参考电压。
IPC结构图谱:
| H | 电学 |
| --H03 | 基本电子电路 |
| ----H03M | 一般编码、译码或代码转换 |
| ------H03M3/00 | 模拟值转换到差分调制或相反转换 |
| --------H03M3/02 | .增量调制，即单比特差分调制 |