TCXO, how are high-precision temperature-compensated crystal oscillators produced?

TCXO is the abbreviation of Temperature Compensate X'tal (crystal) Oscillator. The Chinese translation is temperature compensated crystal oscillator, referred to as temperature compensated crystal oscillator. TCXO counteracts the impact of ambient temperature changes on frequency stability by introducing a temperature compensation mechanism into the oscillator circuit.

The core component of the TCXO is a crystal oscillator, which uses the properties of crystal resonance to generate a stable frequency signal. However, the frequency of a crystal oscillator is affected by temperature changes, causing the output frequency to drift. To solve this problem, TCXO introduces a temperature sensor and compensation circuit into the crystal oscillator circuit.

Figure 1: Temperature characteristics of crystal oscillator

The temperature sensor is used to monitor changes in ambient temperature and transmit temperature information to the compensation circuit. The compensation circuit automatically adjusts the parameters of the crystal oscillator based on data provided by the temperature sensor to offset frequency drift caused by temperature changes. By compensating the crystal oscillator, TCXO is able to provide higher frequency stability and lower frequency drift.

Figure 2: Temperature compensation circuit

Figure 3: TCXO internal design

Through the function of the temperature compensation loop, the frequency deviation caused by temperature is compensated and corrected, and the effect shown in the figure below is obtained:

Figure 4: Temperature curve before compensation (red) & after compensation (green)

TCXOs have many advantages that make them a good choice for many applications. First, it provides high frequency stability to meet precise synchronization and timing requirements. Secondly, TCXO has a wide adaptability range and can provide stable frequency output in a wide temperature range. In addition, compared with other similar oscillators, TCXO has lower power consumption and smaller size, making it suitable for integration into various small devices.

HCI TCXO/VCTCXO

Feature:

Package：2016/2520/3225/5032/7050

Frequency Range：5-1500MHz

Stability: ±0.28~2ppm @-40+85℃

Output: CMOS/LVDS/LVPECL/Clipped Sine wave

VCTCXO frequency pull ranging: 0.5 to 5ppm

Application :

GPS unit, Cellular and Wireless Communications,Network Equipment，Mobile.

TCXO has been used in many fields, especially in wireless communications, satellite navigation, computer networks and precision measurement. Base stations and mobile terminals in wireless communication systems use TCXOs to achieve accurate time slot synchronization and frequency adjustment. Receivers in satellite navigation systems use TCXOs to ensure precise time synchronization and frequency tracking. In computer networks, switches and routers use TCXOs for data transmission with a stable clock signal. Precision measurement equipment, such as spectrum analyzers and instrumentation, also utilize TCXO's high-precision time base information.

TCXO provides stable frequency output by introducing a temperature compensation mechanism, which is suitable for devices that require high-precision clock or frequency stability. It plays a key role in a variety of applications, ensuring accurate synchronization and high-quality data transfer between devices.

About Suzhou Hangjing Elec & Tech Co., LTD

Suzhou Hangjing Electronic Technology Co., Ltd. was established in 2014. It specializes in the research and development, design, production, sales and service of quartz frequency control components, crystal oscillators, temperature compensated and constant temperature crystal oscillator products, and provides customers with a sound supply chain system. Provide a full range of services. Suzhou Hangjing is headquartered in Suzhou, with branches in Beijing and offices in Shenzhen/Xi'an. With Suzhou as the center, it radiates to Beijing, the Yangtze River Delta, the Pearl River Delta and the western development.

In the piezoelectric crystal industry, Suzhou Hangjing Electronics' technology and quality are at the forefront of the industry. The company fully complies with the ISO9001:2015 quality system and the national military standard GJB 9001C:2017 standard management model. The products produced comply with EU RoHS and Reach regulations. It can provide miniaturized, high-precision, wide-temperature, industrial-grade, and vehicle-mounted products. It has a rich product line, including quartz crystal oscillators, clock oscillators, high-end clock oscillators (differential minute oscillators/TCXO/VCXO/OCXO) and other products.

Suzhou Hangjing Electronics' products are widely used in industrial control, research institutes, military, aerospace fields, video systems, communication systems, measuring instruments, power equipment, program-controlled exchanges, automatic control, information platforms, radar navigation, digital products, high-definition surveillance, precision Instruments, radio communications, mobile communications base stations, national defense (moving target display radar), navigation, frequency counters, spectrum and network analysis instruments (frequency standards) and other fields.