Quartz crystals cannot be used in RC sinusoidal oscillation circuits. Because the crystal impedance is close to zero when the quartz crystal oscillator is at the series resonance point, the resonant frequency of the LC parallel circuit is close to the inherent resonant frequency of the quartz cr

The matching capacitance of passive crystal oscillator is usually better to choose two unequal capacitors, one large and one small can speed up the start of vibration. The larger capacitance is beneficial to the stability of the oscillation, but it will increase the starting time. The commonly used

Given the choice of signals, the frequency of the general frequency converter can also be given in a variety of ways, panel given, external given, external voltage or current given, communication mode given. Of course, the frequency of the frequency of the frequency converter can also be the sum of

Setting the starting mode of frequency converter, general frequency converter in the factory adjust by start from the panel, the user can choose according to the actual situation start mode, can use the panel, external terminal, communication mode and so on several kinds.

The frequency converter adopts the control mode, namely the speed control, the rotation distance control, the PID control or other ways. After adopting the control mode, we usually need static or dynamic identification according to the control precision.

Commonly used frequency converter, generally out of the factory, manufacturers have a default value for each parameter, these parameters are called factory values. In the case of these parameter values, the user can operate normally in the face panel operation mode, but the panel operation does not

Increase the level of soundIf there are many different types of speakers in a sound system and no frequency divider is used, there will be a lot of frequency superposition and repetition between the different speakers, and the sound interference will become very serious. The sound becomes blurred. I

Protective speakerThe operating frequency of different loudspeakers is different. Generally speaking, the larger the caliber of loudspeakers, the better their low frequency characteristics and the lower the frequency of diving. The frequency divider can provide the optimal working frequency of the d

Frequency divisionThe main function and task of any type of frequency divider is of course frequency division. As there are many kinds of speakers in the system, what functions should be used in the system, several frequency divider or flexible configuration, now usually used frequency divider has 2

In terms of the circuit structure, the frequency divider is essentially a LC filter network composed of capacitors and inductor coils, and the high tone channel is a high pass filter, which only allows the high-frequency signal to pass through and blocks the low-frequency signal. The bass channel, o