无源晶振和有源晶振如何连入电路?解释如下:
About circuit connection 关于电路连接
The output level of Crystal is variable, and it depends on the vibration of the circuit. The same crystals can be used for different voltages. The output signal of the crystal is worse than the oscillator’s and needs to match with the extern circuit (capacitors, resistors, and inductors). That is to say, different frequency crystals must match different extern circuits. It’s advised to try to use high-precision oscillators.
晶体(在这里通常指无源晶振、晶体谐振器、Crystal)的输出电平是可变的,这取决于电路的振动。相同的晶体可用于不同的电压。晶体的输出信号比振荡器的输出信号差,需要与外部电路(电容器、电阻器和电感器)匹配。也就是说,不同频率的晶体必须匹配不同的外部电路。建议尝试使用高精度振荡器。
产高精度晶体振荡器OSC2016 8MHz主要电气参数如下:
The connection of oscillators is easier than others and mainly is promised the power supply filtering. It usually uses a capacitor and inductor to form a PI type filter, and the output end can filter the signal with a small resistance resistor and isn’t necessary to use a complex circuit. The instruction of an oscillator is: pin 1 for no connection, Pin2 for GND, pin3 for output, and pin4 for voltage. Compared with crystal, the disadvantage of an oscillator is permanent output level so it has bad flexibility and higher price. If you focus more on-time precision, it’s recommended to choose a higher precision oscillator, particularly TCXO.
产高精度TCXO温补晶体振荡器200MHz主要电气参数如下:
振荡器(在这里通常指有源晶振、晶体振荡器、Crystal Oscillator)的连接比其他振荡器更容易,主要是电源滤波。它通常使用电容器和电感器组成PI型滤波器,输出端可以用小电阻器对信号进行滤波,不需要使用复杂的电路。一般情况下,晶体振荡器的使用说明为:引脚 #1为无连接,引脚#2为GND,引脚#3为信号输出,引脚#4为电压输入。与晶体谐振器相比,晶体振荡器的缺点是输出电平是固定的,因此灵活性差,价格较高。如果您更注重准时及精度,建议选择更高精度的晶体振荡器,尤其是 TCXO温补晶振。
控制引脚#1:有源晶振通常包括一些控制引脚,例如使能脚和待机脚。这些引脚用于控制晶振的工作状态和功耗。
接地引脚#2:有源晶振的接地引脚,需要连接至电源的负极或地线。
信号输出引脚#3:有源晶振的输出引脚,用于输出时钟信号。
电源引脚#4:有源晶振的供电引脚,通常需要接入电源正极。
So what is the difference between the method of connection in the soldering circuit? Of course, there are other capacitors and resistors next to the crystal circuit to help the crystal oscillator vibrate. But active crystal oscillator has been set in a chip in the technology, which means that it can start to vibrate without the need for an external circuit.
那么焊接电路中的连接方式有什么区别呢?当然,晶体电路旁边还有其他电容器和电阻器来帮助晶体振荡器振动。但是有源晶体振荡器已经内设含IC在内的起振电路,这意味着它可以在不需要外部电路的情况下就可以起振。