公开(公告)号：US09356568B2

公开(公告)日：2016-05-31

申请号：US14334569

申请日：2014-07-17

Applicant: Analog Devices, Inc.

Inventor： Jie Zhou ,  Arthur J. Kalb ,  Mark D. Reisiger

IPC: H03F3/393 ,  H03F3/45

CPC classification number: H03F3/393 ,  H03F3/45192 ,  H03F3/45775 ,  H03F2200/271 ,  H03F2203/45048

Abstract: Apparatus and methods for chopper amplifiers are provided herein. In certain configurations, a chopper amplifier includes at least one differential transistor bank including a selection circuit and a plurality of transistors. The selection circuit can select a first portion of the transistors for operation in a first transistor group and a second portion of the transistors for operation in a second transistor group. During calibration, the chopper amplifier's input offset can be observed for different transistor configurations of the differential transistor banks. Although the transistors of a particular bank can be designed to have about the same drive-strength and/or geometry, the chopper amplifier can have a different input offset in different transistor configurations due to manufacturing mismatch between transistors, such as process variation. The chopper amplifier can be programmed to operate with the selected transistor configurations of the differential transistor banks to provide the amplifier with low input offset.

Abstract translation: 本文提供了斩波放大器的装置和方法。 在某些配置中，斩波放大器包括至少一个包括选择电路和多个晶体管的差分晶体管组。 选择电路可以选择用于在第一晶体管组中操作的晶体管的第一部分和用于在第二晶体管组中操作的晶体管的第二部分。 在校准期间，可以对差分晶体管组的不同晶体管配置观察到斩波放大器的输入偏移。 尽管特定存储体的晶体管可被设计成具有大致相同的驱动强度和/或几何形状，但是由于晶体管之间的制造失配（例如工艺变化），斩波放大器可以在不同的晶体管配置中具有不同的输入偏移。 斩波放大器可以编程为与差分晶体管组的选定晶体管配置一起工作，为放大器提供低输入偏移。

公开(公告)号：US10720919B2

公开(公告)日：2020-07-21

申请号：US14534662

申请日：2014-11-06

Applicant: Analog Devices, Inc.

Inventor： Jie Zhou ,  Arthur J. Kalb

IPC: H03K17/687 ,  H03K19/0185

Abstract: Apparatus and methods for reducing charge injection mismatch are provided herein. In certain implementations, an electronic circuit includes one or more switch banks. Each switch bank can include a selection circuit and a plurality of switches that can be controlled using one or more clock signals. The selection circuit can select a first portion of the switches for operation in a first switch group and a second portion of the switches for operation in a second switch group. During a calibration, the electronic circuit's charge injection mismatch can be directly or indirectly observed for different switch configurations of the switch banks. The electronic circuit can be programmed to operate with the selected switch configurations of the switch banks to provide the electronic circuit with small charge injection mismatch.

公开(公告)号：US20150054576A1

公开(公告)日：2015-02-26

申请号：US14334569

申请日：2014-07-17

Applicant: Analog Devices, Inc.

Inventor： Jie Zhou ,  Arthur J. Kalb ,  Mark D. Reisiger

IPC: H03F3/393 ,  H03F3/45

CPC classification number: H03F3/393 ,  H03F3/45192 ,  H03F3/45775 ,  H03F2200/271 ,  H03F2203/45048

Abstract: Apparatus and methods for chopper amplifiers are provided herein. In certain configurations, a chopper amplifier includes at least one differential transistor bank including a selection circuit and a plurality of transistors. The selection circuit can select a first portion of the transistors for operation in a first transistor group and a second portion of the transistors for operation in a second transistor group. During calibration, the chopper amplifier's input offset can be observed for different transistor configurations of the differential transistor banks. Although the transistors of a particular bank can be designed to have about the same drive-strength and/or geometry, the chopper amplifier can have a different input offset in different transistor configurations due to manufacturing mismatch between transistors, such as process variation. The chopper amplifier can be programmed to operate with the selected transistor configurations of the differential transistor banks to provide the amplifier with low input offset.

Abstract translation: 本文提供了斩波放大器的装置和方法。 在某些配置中，斩波放大器包括至少一个包括选择电路和多个晶体管的差分晶体管组。 选择电路可以选择用于在第一晶体管组中操作的晶体管的第一部分和用于在第二晶体管组中操作的晶体管的第二部分。 在校准期间，可以对差分晶体管组的不同晶体管配置观察到斩波放大器的输入偏移。 尽管特定存储体的晶体管可被设计成具有大致相同的驱动强度和/或几何形状，但是由于晶体管之间的制造失配（例如工艺变化），斩波放大器可以在不同的晶体管配置中具有不同的输入偏移。 斩波放大器可以编程为与差分晶体管组的选定晶体管配置一起工作，为放大器提供低输入偏移。

公开(公告)号：US20160134278A1

公开(公告)日：2016-05-12

申请号：US14534662

申请日：2014-11-06

Applicant: Analog Devices, Inc.

Inventor： Jie Zhou ,  Arthur J. Kalb

IPC: H03K17/687

Abstract: Apparatus and methods for reducing charge injection mismatch are provided herein. In certain implementations, an electronic circuit includes one or more switch banks. Each switch bank can include a selection circuit and a plurality of switches that can be controlled using one or more clock signals. The selection circuit can select a first portion of the switches for operation in a first switch group and a second portion of the switches for operation in a second switch group. During a calibration, the electronic circuit's charge injection mismatch can be directly or indirectly observed for different switch configurations of the switch banks. The electronic circuit can be programmed to operate with the selected switch configurations of the switch banks to provide the electronic circuit with small charge injection mismatch.

Abstract translation: 本文提供了用于减少电荷注入失配的装置和方法。 在某些实施方式中，电子电路包括一个或多个开关组。 每个开关组可以包括可以使用一个或多个时钟信号来控制的选择电路和多个开关。 选择电路可以选择用于在第一开关组中操作的开关的第一部分和用于在第二开关组中操作的开关的第二部分。 在校准期间，可以直接或间接地观察电子电路的电荷注入失配，用于开关组的不同开关配置。 电子电路可以被编程为使用开关组的所选择的开关配置来操作，以为电子电路提供小的电荷注入不匹配。