Balanced bridge temperature regulator for an air-mass flow meter
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United States of America Patent
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May 14, 2002
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N/A
app pub date -
Feb 26, 1999
filing date -
Feb 27, 1998
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Abstract
A temperature regulator, circuit for an air-mass flow meter in which the temperature regulator circuit includes a bridge circuit one of whose bridge branches contains a temperature resistor of substantially higher resistance than a heating resistor in the other bridge branch. The resistance element of the temperature resistor normally requires a large amount of space on the sensor for this purpose. In order to reduce the size of the resistance element, a voltage divider is provided to reduce the input voltage applied to the temperature resistor. In order to maintain the bridge balance, additional circuit elements are provided in the other bridge branch containing the heating resistor.
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