Differential, as the name suggests, is a crystal oscillator that outputs a differential signal. The output differential signal uses two signals with completely opposite phases to eliminate common mode noise. Output Types: LVPECL/LVDS/HCSL.

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The difference between differential oscillators and ordinary crystal oscillators:
 Differential oscillators and ordinary crystal oscillators are common types of oscillators used in the electronics field to generate high-precision clock signals. Although they both share the basic functionality of an oscillator, there are some significant differences in principle, performance, and application.

1. Definition and concepts
 Ordinary crystal oscillator: Ordinary crystal oscillator uses the resonance characteristics of quartz crystal to generate a stable clock signal. Its basic working principle is to generate a signal with a fixed frequency through the mechanical vibration of the crystal. It is widely used in fields such as clock synchronization and data sampling in electronic equipment.

Differential Oscillator: A differential oscillator is a device that uses a differential feedback loop to achieve oscillation. It uses two complementary phase outputs for oscillation, providing better anti-interference performance and noise characteristics. Differential oscillators are commonly used in high-speed communication systems and analog circuits.

2. Working principle
 Ordinary crystal oscillator: The working principle of ordinary crystal oscillator is based on the piezoelectric effect of the crystal. When a voltage is applied to a crystal, mechanical vibrations are generated, which are amplified and fed back to the crystal, forming a stable oscillation loop. Ordinary crystal oscillators have good frequency stability and long-term stability.

Differential Oscillator: A differential oscillator uses two mutually coupled differential feedback loops to achieve oscillation. This design reduces common-mode noise in single-ended oscillators and improves signal quality and immunity to interference. Differential oscillators typically use a differential pair output to provide a cleaner clock signal in high-speed digital or analog systems.

3. Performance characteristics
 Ordinary crystal oscillator:
 High frequency stability, suitable for applications requiring higher frequency accuracy.
 The cost is low and the manufacturing process is relatively simple.
 Strong reliability and good long-term stability.

4, Differential Oscillator:
 It has strong anti-interference performance and is suitable for systems in high-interference environments.
 The output signal quality is higher and the noise is lower.
 Requires more complex design and debugging, and may be more costly.