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1. 发明授权

US07782234B2 Successive approximation analog-to-digital converter with inbuilt redundancy 有权
标题翻译：具有内置冗余的逐次逼近模数转换器
公开(公告)号：US07782234B2
公开(公告)日：2010-08-24
申请号：US11755754
申请日：2007-05-31
申请人： Fazil Ahmad
发明人： Fazil Ahmad
IPC分类号： H03M1/06
CPC分类号： H03M1/069 , H03M1/162 , H03M1/46
摘要： The method and system for converting an analog value into a digital equivalent using a plurality of conversion engines are disclosed. In one embodiment the plurality of conversion engines comprise N DACs associated with M comparators, wherein M is substantially greater than N, wherein M and N are integers, wherein each of the N CAP DACs has an associated P CAP DAC and an N CAP DAC, a method includes generating voltage differences between P CAP DACs and N CAP DACs such that they produce M threshold voltages. The plurality of conversion engines operate in a first phase of the conversion by inputting the produced M threshold voltages to associated inputs of M comparators so that more than one bit can be determined from a sampled signal during each successive approximation trial. The plurality of conversion engines operate in a second phase of the conversion by inputting the produced M threshold voltages into the associated inputs of the M comparators such that the plurality of conversion engines operate independently so that fewer bits are determined from the sampled signal during each successive approximation trial then were determined during the first phase. A result obtained from at least one of the plurality of conversion engines is then outputted.
摘要翻译：公开了使用多个转换引擎将模拟值转换为数字等价物的方法和系统。在一个实施例中，多个转换引擎包括与M个比较器相关联的N个DAC，其中M基本上大于N，其中M和N是整数，其中每个N CAP DAC具有相关联的P CAP DAC和N CAP DAC，一种方法包括产生P CAP DAC和N CAP DAC之间的电压差，使得它们产生M个阈值电压。通过将所产生的M个阈值电压输入到M个比较器的相关输入端，多个转换引擎在转换的第一阶段中工作，从而可以在每个逐次逼近试验期间从采样信号确定多于一个位。通过将产生的M个阈值电压输入到M个比较器的相关输入中，多个转换引擎在转换的第二阶段中工作，使得多个转换引擎独立地操作，使得在每个连续的期间从采样信号确定较少的位然后在第一阶段确定近似试验。然后输出从多个转换引擎中的至少一个获得的结果。

2. 发明申请

US20130335141A1 APPARATUS AND METHODS FOR ELECTRONIC AMPLIFICATION 有权
标题翻译：电子放大的装置和方法
公开(公告)号：US20130335141A1
公开(公告)日：2013-12-19
申请号：US13495929
申请日：2012-06-13
申请人： Fazil Ahmad
发明人： Fazil Ahmad
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/387 , H03F3/4595
摘要： Apparatus and methods for electronic amplification are provided. In one embodiment, a method of electronic amplification includes amplifying a differential input voltage signal to generate a feed-forward signal, chopping the feed-forward signal at a chopping frequency to generate a chopped feed-forward signal, notch filtering the chopped feed-forward signal at the chopping frequency to generate a notched signal, generating an input offset correction signal based at least partly on the notched signal, and amplifying the differential input voltage signal using a signal amplification block to generate an output signal. Amplifying the differential input voltage signal using the signal amplification block includes chopping the input signal at the chopping frequency to generate a chopped input signal and combining the chopped input signal and the offset correction signal to reduce input offset error of the signal amplification block.
摘要翻译：提供了用于电子放大的装置和方法。在一个实施例中，电子放大的方法包括放大差分输入电压信号以产生前馈信号，以斩波频率斩波前馈信号以产生斩波的前馈信号，对切断的前馈信号进行陷波滤波信号以产生陷波信号，至少部分地基于陷波信号产生输入偏移校正信号，以及使用信号放大块放大差分输入电压信号以产生输出信号。使用信号放大块放大差分输入电压信号包括以斩波频率斩波输入信号以产生斩波输入信号，并组合斩波输入信号和偏移校正信号以减小信号放大块的输入偏移误差。

3. 发明授权

US08786363B2 Apparatus and methods for electronic amplification 有权
标题翻译：电子放大的装置和方法
公开(公告)号：US08786363B2
公开(公告)日：2014-07-22
申请号：US13495929
申请日：2012-06-13
申请人： Fazil Ahmad
发明人： Fazil Ahmad
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/387 , H03F3/4595
摘要： Apparatus and methods for electronic amplification are provided. In one embodiment, a method of electronic amplification includes amplifying a differential input voltage signal to generate a feed-forward signal, chopping the feed-forward signal at a chopping frequency to generate a chopped feed-forward signal, notch filtering the chopped feed-forward signal at the chopping frequency to generate a notched signal, generating an input offset correction signal based at least partly on the notched signal, and amplifying the differential input voltage signal using a signal amplification block to generate an output signal. Amplifying the differential input voltage signal using the signal amplification block includes chopping the input signal at the chopping frequency to generate a chopped input signal and combining the chopped input signal and the offset correction signal to reduce input offset error of the signal amplification block.
摘要翻译：提供了用于电子放大的装置和方法。在一个实施例中，电子放大的方法包括放大差分输入电压信号以产生前馈信号，以斩波频率斩波前馈信号以产生斩波的前馈信号，对切断的前馈信号进行陷波滤波信号以产生陷波信号，至少部分地基于陷波信号产生输入偏移校正信号，以及使用信号放大块放大差分输入电压信号以产生输出信号。使用信号放大块放大差分输入电压信号包括以斩波频率斩波输入信号以产生斩波输入信号，并组合斩波输入信号和偏移校正信号以减小信号放大块的输入偏移误差。

4. 发明授权

US08638166B2 Apparatus and methods for notch filtering 有权
标题翻译：陷波滤波的装置和方法
公开(公告)号：US08638166B2
公开(公告)日：2014-01-28
申请号：US13495895
申请日：2012-06-13
申请人： Fazil Ahmad
发明人： Fazil Ahmad
IPC分类号： H03F1/02
CPC分类号： H03F3/387 , H03H19/004 , H03H2011/0488
摘要： Apparatus and methods for notch filtering are provided. In certain implementations, an amplifier includes amplification stages for providing signal amplification, chopper circuitry for generating a chopped signal by chopping an amplified signal associated with the amplification stages at a chopping frequency, and a time-interleaved finite impulse response (FIR) notch filter for notching frequency components of the chopped signal near the chopping frequency. The time-interleaved FIR notch filter includes a plurality of FIR filters configured to sample the chopped signal at a sampling rate of about twice the chopping frequency. The FIR filters are interleaved in time to reduce sampling error. Additionally, the time-interleaved FIR notch filter includes an infinite impulse response (IIR) filter configured to average samples taken by respective ones of the FIR filters and to integrate the averaged samples to generate the time-interleaved FIR notch filter's output signal.
摘要翻译：提供了用于陷波滤波的装置和方法。在某些实施方案中，放大器包括用于提供信号放大的放大级，用于通过以斩波频率斩波与放大级相关的放大信号来产生斩波信号的斩波电路，以及时间交织的有限脉冲响应（FIR）陷波滤波器，切断频率附近斩波信号的开槽频率分量。时间交错FIR陷波滤波器包括多个FIR滤波器，其被配置为以大约是斩波频率的两倍的采样率对斩波信号进行采样。 FIR滤波器及时交错以减少采样误差。此外，时间交错FIR陷波滤波器包括无限脉冲响应（IIR）滤波器，其被配置为平均由相应FIR滤波器获取的采样，并且对平均采样进行积分以产生时间交错FIR陷波滤波器的输出信号。

5. 发明申请

US20130335144A1 APPARATUS AND METHODS FOR NOTCH FILTERING 有权
标题翻译：装置和方法进行过滤
公开(公告)号：US20130335144A1
公开(公告)日：2013-12-19
申请号：US13495895
申请日：2012-06-13
申请人： Fazil Ahmad
发明人： Fazil Ahmad
IPC分类号： H03F3/45
CPC分类号： H03F3/387 , H03H19/004 , H03H2011/0488
摘要： Apparatus and methods for notch filtering are provided. In certain implementations, an amplifier includes amplification stages for providing signal amplification, chopper circuitry for generating a chopped signal by chopping an amplified signal associated with the amplification stages at a chopping frequency, and a time-interleaved finite impulse response (FIR) notch filter for notching frequency components of the chopped signal near the chopping frequency. The time-interleaved FIR notch filter includes a plurality of FIR filters configured to sample the chopped signal at a sampling rate of about twice the chopping frequency. The FIR filters are interleaved in time to reduce sampling error. Additionally, the time-interleaved FIR notch filter includes an infinite impulse response (IIR) filter configured to average samples taken by respective ones of the FIR filters and to integrate the averaged samples to generate the time-interleaved FIR notch filter's output signal.
摘要翻译：提供了用于陷波滤波的装置和方法。在某些实施方案中，放大器包括用于提供信号放大的放大级，用于通过以斩波频率斩波与放大级相关的放大信号来产生斩波信号的斩波电路，以及时间交织的有限脉冲响应（FIR）陷波滤波器，切断频率附近斩波信号的开槽频率分量。时间交错FIR陷波滤波器包括多个FIR滤波器，其被配置为以大约是斩波频率的两倍的采样率对斩波信号进行采样。 FIR滤波器及时交错以减少采样误差。此外，时间交错FIR陷波滤波器包括无限脉冲响应（IIR）滤波器，其被配置为平均由相应FIR滤波器获取的采样，并且对平均采样进行积分以产生时间交错FIR陷波滤波器的输出信号。

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