Solutions to crystal oscillator frequency multiplication interference

Crystal oscillator frequency doubling interference (high-order harmonic radiation) poses a significant challenge in electromagnetic compatibility (EMC) design, typically manifesting as excessive radiation at the 5th and 7th harmonics of the 25MHz fundamental frequency (e.g., 125MHz, 175MHz). This phenomenon arises from the square wave signals emitted by crystal oscillators, which contain abundant harmonic components. When combined with improper PCB layout, these signals can transform into highly efficient radiation antennas.

1.2V ultra-small crystal oscillator YSO131LR series — designed for low power consumption and small size.

The YSO131LR series 1.2V ultra-compact crystal oscillator is specifically designed for: · Smart wearable devices (watches, bracelets, etc.) · Screen and display module · Portable consumer electronics · Terminal products with strict requirements on power consumption and size

Four methods to improve the phase noise performance of quartz crystal oscillators.

Enhancing the phase noise performance of quartz crystal oscillators is indeed a "core" discipline that integrates materials science, mechanical structures, and electronic circuits. In high-speed communication and precision measurement and control fields, even minor phase jitter can lead to a drastic decline in system performance.

YSN8025TS: High-precision RTC timing solution for photovoltaic inverters

YXC Yangxing Technology's YSN8025TS industrial-grade high-precision RTC chip is designed specifically for applications such as photovoltaic inverters that operate outdoors for extended periods, experience wide temperature fluctuations, and undergo frequent power switching. It can be widely used in centralized, string, micro, and integrated solar energy storage inverter systems, providing stable and reliable time management support for these systems.

The difference between VCTCXO (Voltage-Controlled Temperature-Compensated Crystal Oscillator) and TCXO (Temperature-Compensated Crystal Oscillator)

A TCXO is a temperature-compensated crystal oscillator. It uses a built-in temperature compensation circuit, composed of thermistors and resistive-capacitive components, to reduce the impact of temperature changes on the oscillator's frequency. A VC-TCXO, on the other hand, is a voltage-controlled temperature-compensated crystal oscillator. It adds temperature compensation functionality on top of voltage control, allowing the oscillator's frequency to be adjusted by an external voltage. The main difference between a VC-TCXO and a TCXO is the presence of voltage control functionality.

What are the output waveforms of a crystal oscillator?

The output waveform of a crystal oscillator (XO) is a technical specification as important as the package size. These output waveforms can be broadly categorized into two types: sine wave and square wave.