A new high-frequency capacitor

ONE of the common uses of capacitors is by-passing high-frequency current from circuits in which direct or low-frequency current is flowing. The frequency range over which it is effective as a by-pass depends upon the relative impedance of the capacitor and the impedance across which it is connected. The impedance of a capacitor at a given frequency is determined by its capacitance, inductance, and resistance. At low frequencies the impedance is largely determined by the capacitance, but at high frequencies and thus in most by-passing applications, lead inductance and the inherent inductance of the capacitor become the controlling factors.