LP130F23CET Crystals, Oscillators, Resonators

Crystals

LP130F23CET is a variable frequency engine crystal covering frequency range (2.9MHz to 88 MHz). This crystal usually works in variable frequency engine which can automatically adjust the frequency output in dynamic circuit, this means it can provide frequency output without connection to external clock source.

Application Field

The application of LP130F23CET components is mainly in automotive electronics, smart cards, Bluetooth, and digital TV. Automotive Electronics applications include baseband system, engine control systems and airbag control systems. Smart card applications include mobile banking, NFC payment and NFC marketing, etc. Bluetooth applications include Bluetooth speakers, Bluetooth headset and Bluetooth anti-lost. Digital TV applications include DVB-S/S2 and DVB-T/T2.

Working Principle

LP130F23CET is based on the principle of a liquid crystal oscillator. This device is made up of two parts: a temperature compensation device and a voltage measurement device. The temperature compensation device consists of an inside glass sealed container and an outside isolation container which is filled with liquid crystal material. The liquid crystal material has a characteristic that its viscosity changes with the change of temperature. This change of viscosity will bring about a corresponding change in the capacitance within the liquid crystal material. The voltage measurement device detects the change in capacitance and inputs this information into the voltage applied to the crystal material. As the capacitance changes, the frequency of the crystal oscillator output also changes accordingly. The whole crystal system is monitored by a microprocessor unit to achieve frequency output without connection to external clock source.

Conclusion

LP130F23CET is an important part in a variety of applications, such as automotive electronics, smart cards, Bluetooth, and digital TV. The working principle of this device is a combination of temperature compensation and voltage measurement devices. The viscosity of the liquid crystal material changes with the change of temperature and the change in capacitance is detected by the voltage measurement device which then adjusts the voltage supplied to the crystal material for varying frequency output which can be monitored by a microprocessor without need for connection to external clock source.