What is the main difference between a silicon oscillator and a crystal oscillator?

The biggest difference between a crystal oscillator and a silicon oscillator is that the material is not the same. Crystals use crystals. The crystals are very stable in terms of temperature and other characteristics. This is its outstanding advantage.

Epson Crystal FA-20H

Piezoelectric quartz crystals have become the norm. Once a small current is passed through them, a set frequency oscillation can occur. This oscillation frequency is not affected by temperature changes within the package. Quartz is a rich source of piezoelectric material on the planet. Through precise cutting and tilting, quartz oscillators can get the required frequency. Epson used a photolithographic process to produce a tuning fork resonator with a thickness of 2 mm, which is not achievable with conventional cutting and tilting processes. This process is used on Epson crystal oscillators, which can compete with silicon MEMS oscillators in terms of specifications.

The crystal oscillator and the silicon oscillator have the same structure and are composed of a resonator and an oscillating circuit. The oscillating circuit is the same except that the resonance is different. At present, the silicon oscillator wants to improve the accuracy, and it is bound to require more complicated technology on the oscillating circuit. If this technology can improve its accuracy, the crystal oscillator can also take this part of the oscillating circuit and apply it to the crystal. The original material of the crystal is very excellent, and now more excellent oscillation circuit is added, so the combination of strength and strength makes the crystal oscillator achieve higher accuracy than the silicon oscillator.

EPSON Jingzhen TG2016SBN

Compared with the traditional crystal oscillator, the most prominent advantage of the silicon oscillator is the price advantage, its low production cost, and it has been widely used in some low-end fields. However, Epson is not satisfied with this as a leading company in crystal oscillators. Through cutting-edge technology QMEMS, Epson has continuously introduced new product models in recent years. Not only in terms of product performance, but also in size and size, the miniaturization has been further improved. The most important thing is to quickly reduce manufacturing costs through technological advancement. The price of the EPSON crystal oscillator has become closer to the people and quickly squeezed the market share of silicon oscillators (MEMS). At the same time, in energy consumption, the EPSON crystal oscillator also has a special advantage. Taking the real-time clock module as an example, the current consumption of Epson products is 0.75 μA, while the circuit i consumption of MEMS products is 2 μA, 2.5 times that of the EPSON products. Therefore, the cost of the large-capacity MEMS battery and the miniaturization of the customer's product requirements are difficult to combine.

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