A temperature control device for electric heating wire driven by radio frequency signal

Abstract

A temperature control device capable of driving an electric heating wire to heat by a radio frequency signal comprises a control circuit, a temperature measuring circuit, a multiplier, a radio frequency signal generating circuit and a power amplifying circuit, wherein the control circuit is used for controlling and comparing input signals; the output end of the temperature measuring circuit is connected with the input end of the control circuit; the input end of the multiplier is connected with the output end of the control circuit; the output end of the radio frequency signal generating circuit is connected with the input end of the multiplier; and the input end of the power amplifying circuit is connected with the output end of the multiplier. The temperature control device can effectively reduce the influence on the controlled object by heating a current induction generating magnetic field; furthermore, the heating quantity is linearly changed along with the control quantity, the adjusting resolution ratio is refined, and the control precision is high.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a temperature control device for heating an electric heating wire driven by a radio frequency signal. Background technique [0002] In almost every field, temperature is a very important parameter, so temperature control systems designed based on temperature parameters are widely developed and used, such as in constant temperature crystal oscillators, semiconductor lasers, and atomic clocks. At present, in the temperature control system with heating wire as the load, DC or 50Hz AC is generally used to drive the heating wire to perform temperature control, which causes the heating current to induce a slowly changing magnetic field. However, in the field of atomic clocks, especially in the area where the radiation field interacts with atoms, the requirements for the size and direction of the magnetic field are very strict, so the magnetic field induced by th...

AI Technical Summary

Problems solved by technology

However, in the field of atomic clocks, especially in the area where the radiation field interacts with atoms, the requirements for the size and direction of the magnetic field are very strict, so the magnetic field induced by the heating current is absolutely intolerable

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