3.3. Temperature Diode Beta Variation
As the temperature diode Beta value gets lower, especially if the temperature diode collector is tied to the ground, the Beta value affects the current ratio on . Therefore, maintaining an accurate current ratio is crucial.
Some temperature sensing chips have built-in Beta compensation feature. The Beta variation of the circuitry senses the base current and adjusts the emitter current to compensate for the variation. The Beta compensation maintains the collector current ratio.
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