SEMICONDUCTIVE TEMPERATURE PICKUP Russian patent published in 1998 - IPC

FIELD: systems for automatic control of manufacturing processes. SUBSTANCE: temperature pickup includes two sources 1,10 of direct current voltage, two temperature-sensitive diodes 2,7, two field-effect transistors 4,5, two limiting resistors 3,6. Sources of field effect transistors are mutually connected. Drains of field effect transistors are connected in parallel with circuit including inductance coil and capacitor. At heating impedance of temperature-sensitive diodes 2,7 and capacitive component of impedance of outlets "drain-drain" of field effect transistors are changed, and it causes change of resonance frequency of oscillation circuit. EFFECT: enhanced accuracy of temperature measuring. 1 dwg