Invention Application
- Patent Title: CROSSTALK REDUCTION IN RECEIVER INDUCTIVE LOOP USING CAPTURING LOOP IN TRANSMITTING INDUCTIVE LOOP
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Application No.: US17076275Application Date: 2020-10-21
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Publication No.: US20210036735A1Publication Date: 2021-02-04
- Inventor: Kumar Anurag SHRIVASTAVA
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Main IPC: H04B3/32
- IPC: H04B3/32 ; H04B1/10 ; H04L25/02

Abstract:
An inductively coupled multi-channel digital isolator where the transmitter and receiver inductive loops of a given channel are coplanar. In the case where two adjacent channels flow data in opposite directions, the receiver inductive loops of a given channel include a large, generally conventional loop portion and a small loop portion that is located inside the transmitter inductive loops of the adjacent channels. The sizes of the small loop portion and the conventional loop portion are generally in the ratio of the magnetic flux in the conventional loop portion to the magnetic flux in the transmitter inductive loop. This size relationship results in the voltage of the small loop portion being very close but opposite in sign to the voltage in the conventional loop portion. As a result, there is minimal crosstalk from the transmitter inductive loop of one channel to the receiver inductive loop of the adjacent channel.
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