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Which lead method is employed to compensate for temperature variation in the leads?

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Which lead method is employed to compensate for temperature variation in the leads?

(a) three

(b) eight

(c) six

(d) two

This question was posed to me in an international level competition.

The question is from Implantable Telemetry Systems topic in chapter Biomedical Telemetry of Biomedical Instrumentation

1 Answer

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Best answer
Right option is (c) six

The best I can explain: The third lead is in series with the power supply and is therefore independent of bridge balance.  Compensation for temperature variation in the leads can be provided by using three lead methods. In this method, two of the leads are in the adjacent legs of the bridge which cancels their resistance changes and does not disturb the bridge balance.

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