System and method for reducing inaccuracies caused by temperatur

Details System and method for reducing inaccuracies caused by temperatur System and method for reducing inaccuracies caused by temperatur

1997-09-15

1999-08-10

Jeffery, John A.

Electric heating

Heating devices

Combined with diverse-type art device

341119, 374152, H03M 100

Patent

active

059354666

ABSTRACT:
A system and method for monitoring and regulating the temperature of a D/A converter, thereby reducing inaccuracies caused by temperature drift in the D/A converter comprises a heating device, preferably a transistor, in thermal contact with the D/A converter. The system further includes a temperature sensing control circuit coupled to the D/A converter and the heating device. The temperature sensing control circuit receives a desired temperature signal Vin which indicates a desired temperature for the D/A converter. The temperature sensing control circuit measures the temperature on the D/A converter by calculating a difference in voltage between the base voltage of the D/A converter and the power input signal to the D/A converter. The temperature sensing control circuit then provides a control output to the heating device to regulate the temperature of the D/A converter, wherein the control output is generated in response to the measured temperature of the D/A converter and the desired temperature for the D/A converter. The temperature sensing control circuit operates to repeatedly measure the temperature on the D/A converter and repeatedly provide the control output to the heating device to regulate the temperature of the D/A converter. This operates to reduce inaccuracies caused by temperature drift in the D/A converter.

REFERENCES:
patent: 5319370 (1994-06-01), Signore et al.

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