Microprocessor-based temperature control circuit

Details Microprocessor-based temperature control circuit Microprocessor-based temperature control circuit

Category

G - Physics

Subcategory

05

Subsubcategory

D

IPC codes

G05D 23/19 (2006.01) F23N 5/10 (2006.01) H02M 7/217 (2006.01)

Type

Patent

Patent number

CA 2137881

Description

A temperature control circuit which is capable of operating a microprocessor on a very low voltage source. The temperature control circuit uses a pair of field effect transistors and a zener diode in an oscillator circuit to amplify the source voltage. A microprocessor is supplied by the amplified source voltage, and is connected through a transistor to a temperature sensing portion of the circuit. The microprocessor uses the transistor to turn the power to the temperature sensing circuit portion off between temperature samples. By turning the temperature sensing circuit power off between samples, the average power drain by the control circuit is an amount that can be met by the amplified voltage from the low voltage source.

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