Device and method for compensating crystal characteristics by using radio frequency chip temperature

Abstract

The invention belongs to the electronic communication technical field and relates to a radio frequency chip-based crystal characteristic temperature compensation device and method. The radio frequency chip-based crystal characteristic temperature compensation device is applied to a mobile terminal; a radio frequency chip and a controller are arranged in the mobile terminal; the controller generates frequency control parameters to control the work of the radio frequency chip; the radio frequency chip includes a radio frequency transmit-receive unit and a crystal oscillator attached to the radio frequency transmit-receive unit; a temperature sensing unit is built in the radio frequency transmit-receive unit and is used for obtaining the current temperature of the radio frequency transmit-receive unit; the controller is coupled to the temperature sensing unit and is used for correcting the frequency control parameters according to the current temperature of the radio frequency transmit-receive unit; and the radio frequency transmit-receive unit compensates frequency instability generated by the crystal oscillator under the action of the corrected frequency control parameters. With the device and method of the invention adopted, a temperature compensation system can be simplified; a clock device with temperature stable performance can be provided for the mobile terminal; high-order modulation technologies can be possibly applied to the mobile terminal.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to a device and method for temperature compensating crystal characteristics. Background technique [0002] At present, the requirements of mobile communication users for communication quality and capacity are constantly improving. In order to meet the needs, mobile communication standards have been evolving. The current mobile communication standards used in my country have changed from 2G (The Second Generation Mobile Telecommunications, second generation mobile )'s Global System for Mobile Communications (GSM, Global System for Mobile Communications) to the long-term evolution technology (LTE, Long Term Evolution) of 4G (The Fourth Generation Mobile Telecommunications, fourth generation mobile communications). [0003] The evolution of mobile communication technology comes from the optimization of various communication technologies and the introduction of new techn...

AI Technical Summary

Problems solved by technology

There are many ways to compensate the oscillation frequency temperature. The most common temperature compensated crystal oscillator (TCXO, Temperature Compensate Crystal Oscillator) uses a temperature compensation network to generate a compensation voltage to improve the temperature characteristics of the output frequency of the temperature compensated crystal oscillator. However, this The temperature compensation network of the compensation technology is relatively complicated, requiring a separate thermal sensor, which increases the cost

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