公开(公告)号：US20070001758A1

公开(公告)日：2007-01-04

申请号：US11172186

申请日：2005-06-30

申请人： Alasdair Alexander ,  Chau Tran

发明人： Alasdair Alexander ,  Chau Tran

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F1/14 ,  H03F3/45968 ,  H03F2200/261 ,  H03F2203/45288 ,  H03F2203/45551

摘要： A multiple differential amplifier system and method for transconductance mismatch compensation which in a first phase connects to a differential switched input of a null amplifier, the differential signal input of the main amplifier, inverted, for compensating for offset errors and transconductance mismatches in the null amplifier; and storing in a null storage device connected to an auxiliary input of the null amplifier the output of the null amplifier representing the compensation for the offset error and transconductance mismatch of the null amplifier; and in a second phase connecting the differential switched input of the null amplifier to the differential feedback input of the main amplifier and storing in the main storage device connected to an auxiliary input of the main amplifier the output of the null amplifier representing the compensation for the main amplifier offset error and transconductance mismatch.

公开(公告)号：US20130015916A1

公开(公告)日：2013-01-17

申请号：US13325750

申请日：2011-12-14

申请人： Quan Wan ,  Alasdair Alexander

发明人： Quan Wan ,  Alasdair Alexander

IPC分类号： H03F3/45 ,  H03F3/68

CPC分类号： H03F3/45995 ,  H03F3/211 ,  H03F3/45475 ,  H03F3/45977 ,  H03F2200/261 ,  H03F2200/375 ,  H03F2203/45138 ,  H03F2203/45514 ,  H03F2203/45521 ,  H03F2203/45551 ,  H03F2203/45634 ,  H03F2203/45682 ,  H03F2203/45726

摘要： An auto-zero amplifier includes a main amplifier for amplifying an input signal; the main amplifier receives an offset-correction signal for cancelling an offset at a first common-mode level of the input signal. At the first common-mode level, the offset-correction signal is based on a first value stored using a first offset-storage element. When a change is detected in the input common-mode from the first level to a second level, the first offset-storage element is switched out and a second offset-storage element, having a second value based on the second common-mode level, is switched in.

摘要翻译： 自动调零放大器包括用于放大输入信号的主放大器; 主放大器接收用于抵消输入信号的第一共模电平处的偏移的偏移校正信号。 在第一共模电平下，偏移校正信号基于使用第一偏移存储元件存储的第一值。 当在从第一级到第二级的输入共模中检测到改变时，第一偏移存储元件被切换，并且具有基于第二共模电平的第二值的第二偏移存储元件， 被切换