公开(公告)号：US07737780B2

公开(公告)日：2010-06-15

申请号：US11900917

申请日：2007-09-12

申请人： Pratap N Singh ,  Chandrajit Debnath ,  Rakesh Malik ,  Arnold James D'Souza

发明人： Pratap N Singh ,  Chandrajit Debnath ,  Rakesh Malik ,  Arnold James D'Souza

IPC分类号： H03F3/45

CPC分类号： H03F3/45188 ,  H03F3/45677 ,  H03F2203/45052 ,  H03F2203/45074 ,  H03F2203/45248 ,  H03F2203/45296 ,  H03F2203/45302 ,  H03F2203/45318 ,  H03F2203/45342 ,  H03F2203/45356

摘要： Embodiments of the present invention disclose operational amplifiers which demonstrate good settling behavior with minimum over-shoot or ringing for improving settling behavior. The amplifiers include one or more amplification stages connected to form a symmetric structure. The amplification stage includes a boosting amplifier, a MOS transistor and a compensation capacitor. The MOS transistor can be an NMOS transistor and a PMOS transistor. Using this scheme pole-zero doublets are rearranged in a manner to improve the transient settling response.

摘要翻译： 本发明的实施例公开了运行放大器，其以最小的过冲或振铃来表现出良好的沉降行为，以改善沉降行为。 放大器包括一个或多个连接以形成对称结构的放大级。 放大级包括升压放大器，MOS晶体管和补偿电容器。 MOS晶体管可以是NMOS晶体管和PMOS晶体管。 使用该方案，极点双重重排以改善瞬态稳定响应的方式。

公开(公告)号：US07671676B2

公开(公告)日：2010-03-02

申请号：US11900928

申请日：2007-09-12

申请人： Pratap N Singh ,  Chandrajit Debnath ,  Rakesh Malik

发明人： Pratap N Singh ,  Chandrajit Debnath ,  Rakesh Malik

IPC分类号： H03F3/45

CPC分类号： H03F3/45659 ,  H03F1/3211 ,  H03F3/45183 ,  H03F2203/45404 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45428 ,  H03F2203/45434 ,  H03F2203/45521 ,  H03F2203/45642 ,  H03F2203/45681

摘要： A continuous time common mode feedback module is capable of operating in a wide range of input voltages. The common mode feedback module includes a common mode detector and an amplifier for computing and amplifying the difference of a reference voltage and a common mode voltage of a first input signal and a second input signal. The common-mode feedback module includes a common mode resolver and a control voltage generating module coupled to each other to provide a common mode feedback voltage. The common mode feedback module provides a good linearity and a wide bandwidth, without compensation requirements. The common mode feedback module also provides small process corner dependence of bias current and a common mode offset.

摘要翻译： 连续时间共模反馈模块能够在宽范围的输入电压下工作。 共模反馈模块包括共模检测器和用于计算和放大第一输入信号和第二输入信号的参考电压和共模电压的差的放大器。 共模反馈模块包括共模分解器和彼此耦合以提供共模反馈电压的控制电压产生模块。 共模反馈模块提供良好的线性度和宽带宽，无需补偿要求。 共模反馈模块还提供偏置电流和共模偏移的小过程角依赖性。

公开(公告)号：US07652535B2

公开(公告)日：2010-01-26

申请号：US11900929

申请日：2007-09-12

申请人： Pratap N Singh ,  Chandrajit Debnath ,  Rakesh Malik ,  Ashish Kumar Sharma

发明人： Pratap N Singh ,  Chandrajit Debnath ,  Rakesh Malik ,  Ashish Kumar Sharma

IPC分类号： H03F3/45

CPC分类号： H03F1/3211 ,  H03F3/45192 ,  H03F3/45659 ,  H03F2200/513 ,  H03F2203/45082 ,  H03F2203/45424 ,  H03F2203/45428 ,  H03F2203/45521 ,  H03F2203/45642 ,  H03F2203/45681

摘要： Embodiments of the present invention provide a low voltage continuous time common mode feedback (CMFB) module, for low voltage operational amplifiers, providing good linearity, wide bandwidth and low systematic offset. The common mode feedback module includes a controlling module and an initializing module. The controlling module and the initializing module are parallel common mode feedback loops. The controlling module is a main CMFB loop and the initializing module is an auxiliary CMFB loop and both the loops work simultaneously. The controlling module and the initializing module receive a first differential input voltage and a second differential input voltage supplied by differential outputs of a main differential amplifier. Both the CMFB loops are low gain amplifiers in order to provide operation as linear as possible over the entire differential output operating range of the main differential amplifier.

摘要翻译： 本发明的实施例为低电压运算放大器提供低电压连续时间共模反馈（CMFB）模块，提供良好的线性度，宽带宽和低系统偏移。 共模反馈模块包括控制模块和初始化模块。 控制模块和初始化模块是并联共模反馈回路。 控制模块是主CMFB循环，初始化模块是辅助CMFB循环，两个循环同时工作。 控制模块和初始化模块接收由主差分放大器的差分输出提供的第一差分输入电压和第二差分输入电压。 CMFB环路都是低增益放大器，以便在主差分放大器的整个差分输出工作范围内提供尽可能线性的操作。