Protection from inbound signal noise caused by inductively coupl

Details Protection from inbound signal noise caused by inductively coupl Protection from inbound signal noise caused by inductively coupl

1999-03-29

2000-12-26

Young, Brain

Coded data generation or conversion

Analog to or from digital conversion

Detecting analog signal peak

375 76, 361 11, 367 76, H03M 100

Patent

active

061666696

ABSTRACT:
A noise-immune electronic circuit includes an input circuit for receiving an inbound signal through an input transmission line and comparing the inbound signal with a decision threshold to produce input data of the electronic circuit having one of predefined discrete levels depending on relative magnitudes of the inbound signal and the decision threshold and an output circuit for receiving output data of the electronic circuit and producing therefrom an outbound signal and forwarding the outbound signal onto an output transmission line. The input and output transmission lines are inductively coupled together so that a noise is introduced to the received inbound signal when a voltage transition occurs in the forwarded outbound signal. To avoid decision errors of the input circuit, a noise protection circuit is provided, which is responsive to a voltage transition of the output data of the electronic circuit for controlling the decision threshold at timing coincident with the noise produced in the inbound signal so that the input circuit makes no decision errors in the presence of the noise.

REFERENCES:
patent: 4663744 (1987-05-01), Russell et al.
patent: 4821292 (1989-04-01), Childress
patent: 5784241 (1998-07-01), Munch et al.

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