公开(公告)号：US20180188293A1

公开(公告)日：2018-07-05

申请号：US15395789

申请日：2016-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： ARUP POLLEY ,  SRINATH RAMASWAMY ,  BAHER S. HAROUN

IPC: G01R15/14 ,  G01R19/00

CPC classification number: G01R15/148 ,  G01R15/185 ,  G01R15/207

Abstract: One example includes a current measurement system. The system includes at least two magnetic field sensors positioned proximal to and in a predetermined arrangement with respect to a current conductor, each of the magnetic field sensors being configured to measure magnetic field associated with a current flowing in the current conductor and provide respective magnetic field measurements. The system also includes a current measurement processor configured to implement a mathematical algorithm based on a Taylor series expansion of the magnetic field measurements to calculate an amplitude of the current based on the mathematical algorithm.

公开(公告)号：US20140368944A1

公开(公告)日：2014-12-18

申请号：US14295113

申请日：2014-06-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： ARUP POLLEY ,  Pankaj Pandey ,  Bryan Bloodworth

IPC: G11B5/09 ,  G11B5/60

CPC classification number: G11B5/6011

Abstract: A circuit includes an input that receives a current that increases as a tunneling current sensor moves closer to a media. A high gain path is operatively coupled to the input to amplify the received current as a first amplified output. The first amplified output increases until a saturation threshold is attained for the high gain path. Further increases in the received current beyond the saturation threshold are diverted from the input as an overflow current. A low gain path is operatively coupled to the input to amplify the overflow current as a second amplified output. The second amplified output increases with the overflow current as the tunneling current sensor continues to move closer to the media.

Abstract translation: 电路包括接收当隧道电流传感器更靠近介质移动时增加的电流的输入。 高增益路径可操作地耦合到输入端，以将接收电流放大为第一放大输出。 第一个放大的输出增加，直到达到高增益路径的饱和阈值。 超过饱和阈值的接收电流的进一步增加作为溢出电流从输入转移。 低增益路径可操作地耦合到输入端以放大溢出电流作为第二放大输出。 随着隧道电流传感器继续移动到介质附近，第二个放大输出随溢流电流而增加。