Jinghongxing TechnologyProfessional crystal manufacturer
Jinghongxing TechnologyProfessional crystal manufacturer
The parallel and series are two kinds of common quartz oscillation circuit. The most intuitive difference between the two kinds of circuit is the appearance of resonator. The parallel crystal oscillator is in the form of parallel resonance, and the series crystal oscillator is in the form of series resonance.In order to better understand the basic principle and circuit design of crystal oscillator, we explain the basic characteristics of crystal material and the composition of quartz crystal oscillator circuit.
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1. The nominal frequency refers to the frequency value of the vibration circuit output under normal matching vibration circuit. Indicate as MHz or KHz. 2. Adjust the frequency difference, with the target being the promised error of the frequency at a certain temperature (25 ℃), expressed as parts per million (ppm). 3. Temperature frequency difference refers to the promised error of the target frequency within the operating temperature range. 4. The temperature scale of the homework, which refers to the temperature scale of quartz crystal components working within the prescribed error range. 5. The storage temperature scale refers to the temperature scale at which a crystal maintains its standard characteristics in a non operational state.
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Bluetooth is a wireless technology that supports short-range communication, typically around ten meters. By utilizing Bluetooth levels, communication between mobile communication terminals can be effectively simplified, making data transmission faster and more efficient. The common Bluetooth products in the market are widely used in electronic products such as computers, mobile phones, and entertainment devices, among which the most common is mobile phones.
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Application principle of passive crystal oscillator circuit: The characteristic of passive crystal oscillator is that it needs to be driven by peripheral circuits to generate oscillating clock signals and cannot start oscillating on its own. In passive crystal oscillator circuits, it is generally necessary to select a suitable external capacitor value for optimal matching, in order to fine tune the frequency of the passive crystal oscillator and make its output frequency as close as possible to the nominal frequency center point.
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