How to measure the quality of crystal oscillator

There are generally two methods for crystal oscillator identification: the first is the naked eye identification method (crystal oscillator appearance identification, printed logo identification, crystal oscillator packaging style); the second is the multimeter detection method;

Two types of resistance in a crystal oscillator: feedback resistance and current limiting resistance

Two resistors are generally designed in the crystal oscillator circuit. One is connected across the two ends of the crystal oscillator, called the feedback resistor Rf; the other is connected to the output end of the IC, called the current limiting resistor RD; the capacitor connected to the crystal is called the load matching capacitor. The frequency of the oscillation circuit can be changed by adjusting the capacitance value, and these waveform frequency tests can be observed.

The difference between constant temperature crystal oscillator and temperature compensated crystal oscillator

Oven-controlled crystal oscillator: Oven-controlled crystal oscillator is abbreviated as OCXO (Oven Controlled Crystal Oscillator) Temperature-compensated crystal oscillator: Temperature-compensated crystal oscillator (TCXO), abbreviated as TCXO (Temperature Compensated Crystal Oscillator)

What are the output modes of differential crystal oscillators?

Differential Crystal Oscillator (Differential Crystal Oscillator) is also referred to as "differential crystal oscillator". It outputs two signals with opposite phases through two output terminals (to play an anti-interference role). Differential crystal oscillators have significant advantages in anti-interference, signal integrity, EMI suppression, etc. through differential signal output, and can provide more stable and higher-speed performance clock signals. Therefore, differential crystal oscillators are usually used in high-speed communication systems, optical modules, high-speed serial interfaces (such as PCIe, USB 3.x) and other scenarios.

TCXO makes clock signals not afraid of temperature challenges

A temperature compensated crystal oscillator (TCXO) is a quartz crystal oscillator that uses a built-in temperature compensation circuit to reduce the effect of ambient temperature changes on the oscillation frequency.

Unitree B2-W robot dog demonstrates new skills: the key role of crystal oscillators in quadruped robots

The robot dog needs to maintain high stability and accuracy under changing climate and temperature conditions. The temperature-compensated crystal oscillator can reduce the impact of ambient temperature changes on the oscillation frequency through the built-in temperature compensation circuit, thereby ensuring that the device can provide a stable frequency reference signal under different temperatures.