公开(公告)号：US20160282391A1

公开(公告)日：2016-09-29

申请号：US14669232

申请日：2015-03-26

Applicant: Microchip Technology Incorporated

Inventor： Vincent Quiquempoix ,  Michael Brumann

IPC: G01R21/00 ,  G01R23/165 ,  H03L7/099 ,  H03M1/12 ,  H03M1/36

CPC classification number: G01R21/003 ,  G01R21/06 ,  G01R21/1331 ,  G01R23/165 ,  H03L7/099 ,  H03M1/1245 ,  H03M1/36

Abstract: A power metering circuit includes a current input path for receiving an analog current input at a first analog to digital converter; a voltage input path for receiving an analog voltage input at a second analog to digital converter; a multiplier configured to multiply an output of the current input path and the voltage input path; a notch filter configured to receive an output of the multiplier, the notch filter having a stop band based on a line frequency; and a control circuit for setting a sampling frequency of the first analog to digital converter and the second analog to digital converter to a multiple of the line frequency.

Abstract translation: 电力计量电路包括用于在第一模数转换器处接收模拟电流输入的电流输入路径; 用于接收在第二模数转换器处输入的模拟电压的电压输入路径; 配置为乘以当前输入路径的输出和电压输入路径的乘法器; 陷波滤波器，被配置为接收所述乘法器的输出，所述陷波滤波器具有基于线路频率的阻带; 以及控制电路，用于将第一模数转换器和第二模数转换器的采样频率设置为线路频率的倍数。

公开(公告)号：US10197605B2

公开(公告)日：2019-02-05

申请号：US14669232

申请日：2015-03-26

Applicant: Microchip Technology Incorporated

Inventor： Vincent Quiquempoix ,  Michael Brumann

IPC: G01R21/00 ,  G01R21/06 ,  G01R21/133 ,  G01R23/165 ,  H03L7/099 ,  H03M1/12 ,  H03M1/36

Abstract: A power metering circuit includes a current input path for receiving an analog current input at a first analog to digital converter; a voltage input path for receiving an analog voltage input at a second analog to digital converter; a multiplier configured to multiply an output of the current input path and the voltage input path; a notch filter configured to receive an output of the multiplier, the notch filter having a stop band based on a line frequency; and a control circuit for setting a sampling frequency of the first analog to digital converter and the second analog to digital converter to a multiple of the line frequency.