Cam and groove coupling capacitance-decoupling

　　Decoupling of cam and groove coupling means to take further measures for power supply filtering, removing the signal between the two stages through the power interference. The cam and groove coupling constant is refers to the time constant that the coupling capacitance corresponding to the second level product and input impedance. The decoupling of cam and groove coupling has three purposes:

　　Remove the high-frequency ripple power, and cut the high frequency signal multistage amplifier power through pathway crosstalk.

　　When working in large signal, the circuit has a increase demand for the power supply, causing the power fluctuation, the decoupling of cam and groove coupling can reduce signal power fluctuations in the input stage to / high voltage gain stage effects.

　　To form a suspension gound or a suspension power supply, high frequency switching noise coordination matched active device power generation at the switch will communicate along the power line in complex systems. The main function of decoupling capacitor is to provide a local DC power supply to the active devices, in order to reduce switching noise propagation in board and will lead to more noise.

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