Measurement system and method for temperature frequency correcting apparatus

Abstract

The invention provides a measuring system of a temperature frequency correction device, comprising a temperature box that can adjust the temperature therein in a presetting range of temperature, a temperature frequency correction device held inside the temperature box, a recoding device, a fitting device, a re-sampling device and an accounting device. The recording device records expected output frequency values of each dispersed internal temperature of the temperature frequency correction device and corresponding internal temperature values. The fitting device fits a continuous temperature frequency curve according to all dispersed internal temperature values and corresponding expected output frequency values. The re-sampling device re-samples the fitted temperature frequency curve by the preset sampling temperature interval so as to obtain the corresponding frequency values of all the sampling temperature values. The accounting device accounts to obtain temperature frequency correction control data according to all the sampling temperature values and the corresponding frequency values, and the temperature frequency correction control data is imported inside a storage unit of thetemperature frequency correction device.

Description

technical field [0001] The invention relates to the field of electronic circuit design, in particular to a temperature frequency correction device and its measuring system and method. Background technique [0002] In order to ensure that all electronic devices work properly or synchronously, it is very important to provide accurate clock signals in electronic circuit design. Generally, the clock signal can generally be generated by a crystal oscillator, wherein the crystal oscillator is an electronic circuit that utilizes the mechanical resonance of an oscillating crystal of piezoelectric material to generate an electrical signal of a certain frequency. This frequency is often used for timekeeping (such as in a quartz watch), it can also be used to provide a clock signal for a digital integrated circuit, and it can also be used to stabilize the frequency of a wireless transmitter / receiver. One cause of a clock signal that differs from design is temperature, which can affect...

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Problems solved by technology

[0007] However, such a voltage-controlled temperature-compensated crystal oscillator first requires a high-quality crystal to meet the third-order linear compensation requirement, and such a high-quality crystal is very expensive, especially a small-sized crystal

Secondly, due to the limitation of the maximum output frequency of the crystal oscillator, it is also difficult to ensure high frequency stability and accuracy

In addition, the voltage-controlled temperature-compensated crystal oscillator is difficult to control small frequency changes (eg, less than 1.0 Hz) because it is difficult to accurately generate microvolt-level analog voltages.

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