IntegrationDuring the period covered in this article, ASIC technology brought about a revolution in the industry. At first, hundreds of gate arrays provided the military with a way to improve digital integration, and with the rapid increase in gate density and the improvement of development tools. T

When the capacitor is leaking, the insulation performance between the two poles of the capacitor is decreased, the leakage resistance exists between the two poles, there is a DC current passing through the capacitor, the straightness of the capacitor becomes worse, and the capacity of the capacitor

If the capacitor is broken down, it will also lose the function of the capacitor, because there is a path between the two pins of the capacitor, the direct action of the capacitor disappears, and the DC circuit of the circuit fails, thus affecting the AC working state.Solution: replace the breakdown

Problem description: if the capacitor has an open-circuit fault, then its line appears to be broken, lost capacity, that is, without the role of the capacitance. However, it should be noted that the capacitor has an open-circuit fault, in different circuits, the reason is different, need to be speci

No vibration. The reason for underexcitation is that the excitation power is not enough or the starting time is too long. This phenomenon usually shows that the crystal oscillator does not work after the reset or the crystal oscillator does not work in low power consumption mode, but a tap of th

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.