公开(公告)号：US20160352351A1

公开(公告)日：2016-12-01

申请号：US15160010

申请日：2016-05-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKUJI MIKI ,  KAZUO MATSUKAWA

IPC: H03M1/46

CPC classification number: H03M1/468 ,  H03M1/0626 ,  H03M1/0665

Abstract: An AD converter converts an analogue input voltage into a digital value including a most significant bit to a least significant bit. The AD converter includes: a common node; a capacitive DAC; a comparator; a successive approximation controller; and an integrator. The integrator includes first to Xth integrating circuits connected in a cascade arrangement, where X is an integer greater than or equal to two, and at least one feedforward path that each samples a residual voltage and outputs the sampled residual voltage to one of the second to Xth integrating circuits.

Abstract translation: AD转换器将模拟输入电压转换为包括最高有效位的数字值至最低有效位。 AD转换器包括：公共节点; 电容式DAC; 比较器 逐次逼近控制器; 和一个积分器。 积分器包括以级联布置连接的第一至第X集成电路，其中X为大于或等于2的整数，以及至少一个前馈路径，每个前馈路径对残余电压进行采样，并将采样的残余电压输出到第二至第 第X集成电路。

公开(公告)号：US20170346457A1

公开(公告)日：2017-11-30

申请号：US15594075

申请日：2017-05-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KOJI OBATA ,  KAZUO MATSUKAWA

IPC: H03F3/45 ,  A61B5/00 ,  A61B5/024

CPC classification number: H03F3/45475 ,  A61B5/02108 ,  A61B5/02427 ,  A61B5/7225 ,  H03F2203/45514 ,  H03F2203/45551

Abstract: An amplifier circuit includes a first input branch circuit including a first sampling capacitor, a second input branch circuit including a second sampling capacitor, an averaging capacitor, and a subtraction capacitor, a feedback capacitor, and an operational amplifier. The first sampling capacitor samples an input voltage in a first time period and outputs a first voltage. The second sampling capacitor samples the input voltage in the first time period and outputs a second voltage. The averaging capacitor takes an average of the second voltage in the second time period and outputs a third voltage. The subtraction capacitor receives the third voltage in the first time period. The subtraction capacitor subtracts the first voltage from the third voltage and outputs a fourth voltage in the second time period. The operational amplifier is connected to the feedback capacitor and amplifies the fourth voltage. The first and second time periods are repeated alternately.